Staff Publications

Staff Publications

  • external user (warningwarning)
  • Log in as
  • language uk
  • About

    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

    We have a manual that explains all the features 

Current refinement(s):

Records 1 - 20 / 613

  • help
  • print

    Print search results

  • export
    A maximum of 250 titles can be exported. Please, refine your queryYou can also select and export up to 30 titles via your marked list.
  • alert
    We will mail you new results for this query: keywords==plantenontwikkeling
Check title to add to marked list
Modeling spatial pattern formation in plant development
Adibi, Milad - \ 2017
University. Promotor(en): Vitor Martins dos Santos, co-promotor(en): Christian Fleck. - Wageningen : Wageningen University - ISBN 9789462956896 - 209
plant development - mathematical models - patterns - arabidopsis thaliana - vascular system - xylem - auxins - modeling - systems biology - plantenontwikkeling - wiskundige modellen - patronen - vaatsysteem - xyleem - auxinen - modelleren - systeembiologie

Modern biological research is accumulating an ever-increasing amount of information on genes and their functions. It is apparent that biological functions can very rarely be attributed to a single genes, but rather arise from complex interaction within networks that comprise many genes. A fundamentally important challenge in contemporary biology is to extract mechanistic understanding about the complex behavior of genetic networks from the available data. The interactions within a genetic network are often exceedingly complex and no-linear in nature, and thus are not open to intuitive understanding. This situation has given rise to a host of mathematical and computational approaches aimed at in-depth analysis of genetic network topologies and dynamics. In particular these approaches focus on system level proprieties of these networks, not directly derivable from their constituent components. To a large extent the power of these theoretical approaches rely on meaningful reduction in complexity by utilizing justified simplifications and abstractions. The underlying principle is that in order to comprehend a mechanism, it is not necessary to take into account all the available information about the mechanism. Given this, Computational models that follow this approach focus on incorporating core components that are essential in answering a specific biological question, while simplifying/omitting the less relevant processes. A fundamental question is this regard is what simplifying concept should be employed when developing a theoretical model of a genetic network.

A successful approach to address this question is the notion of network motif analysis. This approach is based on the core idea that most genetic networks are not arbitrary nor unique, instead they can be categorized into common network dynamics and topologies that perform core functions. Analogous to components of an electric circuit (resistors, capacitor, etc.) these network motifs have distinct properties that are independent of the network that they are embedded in. Therefore analysis of genetic networks in terms of their constituent motifs can potentially be an effective mean in obtaining mechanistic understanding about them.

In this thesis the network motif approach is utilized to study two instances of pattern formation in plant tissues. The first study focuses on organization of stem cells within the shoot apical meristem of the model plant, Arabidopsis thaliana. The results demonstrate that three interconnected network motifs can account for a range of experimental observations regarding this system. Furthermore through an exhaustive exploration of the available data, candidate genes and interactions corresponding to these motifs are outlined, thus paving the way for future interdisciplinary investigations.

The second study explores the development of vasculature during arabidopsis embryogenesis. In contrast to shoot apical mersitem in mature plant, the cell number and arrangement of vasculature in highly dynamic during its embryonic development. To account for this feature, a computational framework was utilized that is capable of capturing the interplay between genes and cell growth and division. The outcome revealed that two interlocking networks motifs dynamically control both patterning and growth of the vascular tissue. The study revealed novel spatial features of a motif previously studies exclusively in non-spatial settings. Furthermore the study resulted in a compelling example of model-driven discovery, where theoretical analysis predicted a specific cellular arrangement to be crucial for the correct development of vasculature. Subsequent analysis of experimental data confirmed the existence of this cellular arrangement in the embryo.

The projects presented in this thesis exemplify successful applications of the network motif approach in studying spatial genetic network. In both cases the networks were successfully examined in terms of their constituent motifs, which subsequently lead to increased mechanistic understanding of them. Ultimately the work presented in this thesis demonstrates the effectiveness of studying genetic networks by a combination of careful examination of available biological data and a reductionist modeling approach guided by the concept of network motifs.

Plant cortical microtubule dynamics and cell division plane orientation
Chakrabortty, Bandan - \ 2017
University. Promotor(en): Ben Scheres; Bela Mulder. - Wageningen : Wageningen University - ISBN 9789463431828 - 124
microtubules - plant cell biology - cell division - plant development - molecular biology - morphogenesis - simulation - microtubuli - plantencelbiologie - celdeling - plantenontwikkeling - moleculaire biologie - morfogenese - simulatie

This thesis work aimed at a better understanding of the molecular basis of oriented cell division in plant cell. As, the efficiency of plant morphogenesis depends on oriented cell division, this work should contribute towards a fundamental understanding of the molecular basis of efficient plant morphogenesis. We describe a modelling framework that allows us to simulate microtubule dynamics on the surface of arbitrary shapes. We further explored the generic role of microtubule regulatory effects such as shape anisotropy, edge-catastrophe and enhanced microtubule stabilization on the orientation of the microtubule array. Through a combined approach of experimental observations of cell division patterns and simulation of microtubule dynamics, we describe a possible molecular basis of oriented cell division during Arabidopsis early embryogenesis. We also infer the necessity of incorporating anisotropic growth/stress response of microtubules towards understanding division plane orientation in the growing epidermal root cells of Arabidopsis.

The hot, the cold and the tulip : the regulation of flowering time and dormancy release
Leeggangers, Hendrika A.C.F. - \ 2017
University. Promotor(en): Richard Immink, co-promotor(en): Henk Hilhorst. - Wageningen : Wageningen University - ISBN 9789463430289 - 244
tulipa - lilium - tulips - flowering date - flowering - dormancy - plant development - temperature - plant physiology - vegetative propagation - tulpen - bloeidatum - bloei - slaaptoestand - plantenontwikkeling - temperatuur - plantenfysiologie - vegetatieve vermeerdering

The ornamental geophyte Tulipa gesneriana is the most cultivated bulbous species in the Netherlands. It is widely grown in the field for vegetative propagation purposes and in greenhouses for the production of high quality cut flowers. Over the last decade, the tulip bulb industry is affected by the rapid climate change the world is facing. Temperature is rising and influences the vegetative to reproductive phase change (floral induction) inside the tulip bulbs in spring and processes that are occurring during winter, such as dormancy release.

In this thesis the two temperature-dependent processes related to tulip flowering, being floral induction and dormancy release, were investigated in detail with a special focus at the molecular level. Flowering time has been studied in a broad range of species, including the model species Arabidopsis thaliana and Oryza sativa. The current understanding of this process can be translated to non-model species, such as tulip, through a ‘bottom-up’ and ‘top-down’ approach (Chapter 2). For the ‘bottom-up’ approach conservation of molecular pathways is assumed and researchers make use of sequence homology searches to identify candidate genes. The ‘top-down’ approach starts from large scale data mining, such as RNA-sequencing (RNA-seq) data or microarrays, followed by the association between phenotypes, genes and gene expression patterns. Here, a comparison with data from model plant species is made at the end of the process and this also leads to the identification of candidate genes for a particular process.

Large scale genomics data mining in tulip is only possible via transcriptome analysis with RNA-seq derived data, because no full genome-sequence is present at this moment. Genome sequencing remains a challenge for species with a large and complex genome, containing probably a large number of repetitive sequences, which is the case for tulip and lily. In chapter 3 a high quality transcriptome of tulip and lily is presented, which is derived from a collection of different tissues. In order to obtain good transcriptome coverage and to facilitate effective data mining, different filtering parameters were used. This analysis revealed the limitations of commonly applied methods used in de novo transcriptome assembly. The generated transcriptome for tulip and lily is made publicly available via a user friendly database, named the ‘Transcriptome Browser’.

The molecular regulation of the temperature-dependent floral induction was studied through the use of RNA-seq (Chapter 4). A better understanding of this process is needed to prevent floral bud blasting (dehydration of the flower) in the future. The development at the shoot apical meristem (SAM) was morphologically investigated in two contrasting temperature environments, high and low. Meristem-enriched tissues were collected before and during the start of flower development. The start of flower development is morphologically visible by rounding of the SAM and correlates with the up-regulation of TGSQA, an AP1-like gene. A ‘top-down’ approach was used to identify possible regulators of the floral induction in tulip. However, Gene ontology (GO)-enrichment analysis of the differentially expressed genes showed that the floral induction, maturation of the bulb and dormancy establishment are occurring around the same period in time. Therefore a ‘bottom-up’ approach was followed to identify specific flowering time regulators based on knowledge obtained from other species. Expression analysis in tulip, heterologous analysis in Arabidopsis and yeast two hybrid-based protein-protein interaction studies revealed that Tulipa gesneriana TERMINAL FLOWER 1 (TgTFL1) is likely a repressor of flowering, whereas Tulipa gesneriana SUPPRESSOR OF OVEREXPRESSION OF CONSTANS-LIKE2 (TgSOC1L2) acts probably as a floral activator.

Another well-known flowering time regulator is FLOWERING LOCUS T (FT), which is a member of the PEBP gene family found in Arabidopsis and many more plant species. In tulip and lily, a total of four highly similar sequences to FT and HEADING DATA 3A (Hd3a) were identified (Chapter 5). Overexpression of Lilium longiflorum FT (LlFT) and TgFT2 in Arabidopsis resulted in an early flowering phenotype, but upon overexpression of TgFT1 and TgFT3 a late flowering phenotype was observed. The tulip PEBP genes TgFT2 and TgFT3 have a similar expression pattern during development, but show a different behaviour in Arabidopsis. Therefore the difference within the amino acid sequence was investigated, which resulted in the identification of two important amino acids for the FT function, which appeared to be mutated in TgFT3. Interchanging of these amino acids between TgFT2 and TgFT3 resulted in conversion of the phenotype, showing the potential importance of these positions in the protein and these specific amino acids for the molecular mode of action of these two proteins. Based on all the data, LlFT is considered to play a role in creating meristem competency to flowering related cues and TgFT2 to act as a florigen involved in the floral induction. The function of TgFT3 is not clear, but phylogenetic analysis suggests a bulb specific function.

After the floral induction and completion of flower development inside the tulip bulb, a period of prolonged cold is required for proper flowering in spring. Low temperature stimulates the re-mobilization of carbohydrates from the scale tissues to the sink organs, such as the floral stem, floral bud and leaves. Not many details are known about the molecular and metabolic changes during this cold period. In chapter 6, first insights are shown on the development of the different tissues inside the bulbs. The floral bud appears to be the least active tissue in comparison with the floral stem and leaves, suggesting a type of floral bud dormancy in tulip. However, metabolic changes are suggesting that the floral bud is still showing active cell division and/or preparation for elongation by turgor-driven cell wall extension. Dormancy of all tissues seems to be released ten weeks after planting and is correlated with the increase of glucose levels. In the leaves, from this same moment, photosynthesis related genes are up-regulated suggesting that the leaves are preparing for photosynthesis while still beneath the soil surface.

At the end of the thesis a glance is given at different perspectives of the tulips life cycle, categorizing tulip as a perennial, biennial or annual plant species, respectively. The perennial way of life is applicable when growing bulbs from seeds, while biennial and annual are more in relation to vegetative propagation. Also the importance of bulb size is highlighted, because it will determine if the bulbs are able to flower or not the following spring. Two scenarios are discussed related to availability of energy in the presence of carbohydrates and meristem incompetency to floral inducing signals. Throughout all research done for this thesis, it became clear that tulip bulbs and seeds have a lot in common. By combining the knowledge of processes in different plant species or developmental systems it is possible to understand how flowering and dormancy release are regulated and this provides us with novel insights how these processes are regulated in bulbous plant species, such as tulip.

Plant reageert op korte en lange termijn verschillend op lichtkleur : onderscheid effecten fotosynthese en fotomorfogenese
Ieperen, W. van; Heuvelink, E. ; Kierkels, T. - \ 2016
Onder Glas 13 (2016)10. - p. 15 - 17.
kunstlicht - fotosynthese - plantenontwikkeling - fotomorfogenese - proefopzet - fotosynthetische actieve straling - belichting - glastuinbouw - artificial light - photosynthesis - plant development - photomorphogenesis - experimental design - photosynthetically active radiation - illumination - greenhouse horticulture
De inzichten in het effect van lichtkleuren op fotosynthese, vorm en ontwikkeling groeien gestaag. Je zou dan graag willen dat het om simpele relaties gaat, bijvoorbeeld ‘blauw licht opent huidmondjes’. Zo ligt het echter vaak niet. Effecten op korte en lange termijn zijn vaak verschillend en het gaat altijd om de mix van kleuren.
Potassium, the major organiser in numerous plant processes : involved in almost everything the plant turns into plant
Heuvelink, E. ; Kierkels, T. - \ 2016
In Greenhouses : the international magazine for greenhouse growers 5 (2016)4. - ISSN 2215-0633 - p. 46 - 47.
greenhouse horticulture - crop production - crop quality - potassium - plant development - nutrient requirements - glastuinbouw - gewasproductie - gewaskwaliteit - kalium - plantenontwikkeling - voedingsstoffenbehoeften
No potassium no plant: A huge number of processes are dependent on this element. Luckily, hardly any problems occur because the plant is good at looking after itself in this respect.
Stikstof blijkt behalve essentieel voedingselement ook signaalstof : aansturing van processen, zoals een hormoon
Heuvelink, E. ; Kierkels, T. - \ 2016
Onder Glas 13 (2016)9. - p. 20 - 21.
glastuinbouw - voedingsstoffenbehoeften - stikstof - plantenontwikkeling - greenhouse horticulture - nutrient requirements - nitrogen - plant development
Er is geen voedingselement waarvan de plant zoveel nodig heeft als stikstof. Het gehalte kan wel 5% van de drogestof uitmaken. Behalve als essentieel onderdeel van veel plantonderdelen en inhoudsstoffen, wordt ook steeds meer duidelijk dat stikstof een signaalstof is, die processen aanstuurt, bijna zoals een hormoon.
Stress speelt een belangrijke rol : inzicht in koploosheid groeit door gezamenlijk onderzoek
Groot, S.P.C. ; Kierkels, T. ; Heuvelink, E. - \ 2016
Onder Glas 13 (2016)8. - p. 30 - 31.
tuinbouw - groenten - landbouwkundig onderzoek - groeistoornis - plantenontwikkeling - verlichting - tomaten - capsicum - brassica - gypsophila - stresstolerantie - temperatuur - horticulture - vegetables - agricultural research - failure to thrive - plant development - lighting - tomatoes - stress tolerance - temperature

Jonge tomaten- en paprikaplanten, maar ook een aantal andere gewassen, houden soms opeens op met groeien. Koploosheid was lange tijd een lastig maar zeer slecht begrepen fenomeen. De laatste jaren is het inzicht in een stroomversnelling gekomen. In ieder geval is het aantal mogelijke oorzaken drastisch ingeperkt.
Het Nieuwe Gewas : sturen van de plantvorm voor verhoogde lichtbenutting
Gelder, Arie de; Janse, Jan ; Warmenhoven, Mary - \ 2016
Bleiswijk : Wageningen UR Glastuinbouw (Rapport GTB 1407) - 62
tomaten - solanum lycopersicum - kasgewassen - glasgroenten - glastuinbouw - energiebesparing - plantenontwikkeling - gewasteelt - licht - tomatoes - greenhouse crops - greenhouse vegetables - greenhouse horticulture - energy saving - plant development - crop management - light
Wageningen UR Greenhouse horticulture searched in the “The New Crop” project for the crop structure that best contributes to the goal of energy-efficient production and therefore energy saving, by removing 33, 44 or 55% of the leaves at a young stage. On October 10th 2014 the experiment started with topped plants of the tomato variety Brioso grafted on Maxifort. Dry matter production was lowest in the very open crop, however partitioning to the fruits was highest in that treatment. Therefore, this crop produced in the winter under assimilation lighting most. In summer, the standard treatment was the best and the production in this treatment was highest. The plants in the very open treatment were shorter and had smaller leaves than the plants of the standard treatment. This is might be due to a different red: far red ratio of light in the crop. Leaf picking at a young stage contributes to better distribution of assimilates to the fruits. This can be used as a crop management measure as the plant in winter develops too much leaves. The project was funded by the Dutch energy transition program “Kas als Energiebron”.
Adventitious root formation in Arabidopsis : underlying mechanisms and applications
Massoumi, Mehdi - \ 2016
University. Promotor(en): Richard Visser, co-promotor(en): Geert-Jan de Klerk; Frans Krens. - Wageningen : Wageningen University - ISBN 9789462578524 - 191
arabidopsis thaliana - adventitious roots - formation - plant development - quantitative traits - etiolation - auxins - explants - molecular biology - gene expression - dna methylation - rooting - ontogeny - plant breeding - adventiefwortels - formatie - plantenontwikkeling - kwantitatieve kenmerken - etiolering - auxinen - explantaten - moleculaire biologie - genexpressie - dna-methylering - beworteling - ontogenie - plantenveredeling

Adventitious root (AR) formation is indispensable in vegetative propagation and is widely used. A better understanding of the underlying mechanisms is needed to improve rooting treatments. We first established a system to study rooting in Arabidopsis, the model organism in plant biology but only occasionally used to study adventitious rooting. Inhibition of polar auxin transport reduced AR formation. The role of auxin transporter proteins (several PIN-proteins) was found to be tissue-specific. Maturation (the transition from juvenile to adult) negatively influenced AR formation. Maturation was associated with increased DNA methylation and decreased miR156 level. 5-Azacytidine, a drug that reduces DNA methylation, increased rooting. We also examined the effect of two donor plant pre-treatments, etiolation and flooding, on rooting. Both increased AR formation.

White root tips supply plants with oxygen, water and nutrients : healthy roots are fundamental for a healthy plant
Heuvelink, E. ; Kierkels, T. - \ 2016
In Greenhouses : the international magazine for greenhouse growers 5 (2016)3. - ISSN 2215-0633 - p. 44 - 45.
tuinbouw - glastuinbouw - worteloppervlak - wortelharen - wortels - wateropname (planten) - voedselopname - opname (uptake) - calcium - tomaten - pythium - plantenontwikkeling - horticulture - greenhouse horticulture - rhizoplane - root hairs - roots - water uptake - food intake - uptake - tomatoes - plant development
The main, most important function of roots belonging to horticultural crops is the uptake of water and nutrients. Healthy roots are essential for a healthy plant. After all, if the uptake of water and nutrients is not functioning properly, then other aspects also leave a lot to be desired
Chrysanten op water: huidige inzichten
Vermeulen, T. ; Eveleens-Clark, B.A. ; Blok, C. ; Beerens, N. ; Streminska, M.A. - \ 2016
horticulture - greenhouse horticulture - cropping systems - chrysanthemum - hydroponics - plant development - tuinbouw - glastuinbouw - teeltsystemen - hydrocultuur - plantenontwikkeling
Aan de orde komen: materiaalkeuze; voedingswater; micro-leven; rasverschillen; stekmateriaal. Poster van het PlantgezondheidEvent 2016.
Meten plantweerbaarheid is mogelijk maar vergt nog meer kennis : bepalen van activiteit genen biedt perspectief
Wurff, A.W.G. van der; Kierkels, T. ; Heuvelink, E. - \ 2016
Onder Glas 13 (2016)2. - p. 15 - 17.
tuinbouw - glastuinbouw - groenten - potplanten - landbouwkundig onderzoek - gewasbescherming - merken van genen - groeiregulatoren - plantenontwikkeling - salicylzuur - jasmonzuur - abscisinezuur - horticulture - greenhouse horticulture - vegetables - pot plants - agricultural research - plant protection - gene tagging - growth regulators - plant development - salicylic acid - jasmonic acid - abscisic acid
Er zijn veel producten op de markt die de plant zouden versterken. Bij proeven zijn de resultaten vaak afhankelijk van omstandigheden, toedieningstijdstip en ras. Maar langzamerhand wordt het mogelijk te meten of, en hoe, de plant op zulke middelen reageert. Er komt steeds meer zicht op de activiteit van genen die verantwoordelijk zijn voor de aanmaak van afweerstoffen tegen ziekteverwekkers.
Prof. Liesje Mommer over groei en overlevingskansen bij planten
Mommer, L. - \ 2016
Wageningen UR
biodiversiteit - plantenecologie - landbouwkundig onderzoek - plantenontwikkeling - openbare redes - microbiële interacties - grondvegetatie - wortels - planteninteractie - biodiversity - plant ecology - agricultural research - plant development - public speeches - microbial interactions - ground vegetation - roots - plant interaction
Planten jutten elkaar op. Verschillende gewassen die samen een vegetatie vormen, groeien beter dan wanneer er maar één soort groeit. Maar hoe werkt dat? Welke processen onder de grond zorgen ervoor dat deze gewassen samen beter groeien? Prof. Liesje Mommer licht een tip van de sluier op tijdens haar inaugurele rede als persoonlijk hoogleraar bij de leerstoelgroep Plantenecologie en natuurbeheer aan Wageningen
Inzicht en Zichtbaar Weerbaar: meetmethoden nodig voor teelt-zeker weerbaar telen
Wurff, A.W.G. van der; Streminska, M.A. ; Boer, F.A. de; Cuesta Arenas, Y. ; Janse, J. - \ 2015
Wageningen UR
cropping systems - horticulture - plant protection - hydroponics - greenhouse horticulture - conferences - chrysanthemum - soilless culture - substrates - measurement - interactions - markers - plant development - climate - cultivars - tuinbouw - glastuinbouw - teeltsystemen - cultuur zonder grond - substraten - meting - interacties - merkers - plantenontwikkeling - klimaat
Aandacht wordt geschonken aan: voedingswater, micro-leven, rasverschillen, en oud stekmateriaal. Poster van PlantgezondheidEvent 12 maart 2015.
Sturen op compactheid zonder bloeivertraging?
Hogewoning, S.W. ; Trouwborst, G. ; Pot, C.S. ; Eveleens-Clark, B.A. ; Dueck, T.A. - \ 2015
Plant Lighting - 35 p.
tuinbouw - glastuinbouw - sierplanten - potplanten - chrysanthemum - belichting - kalanchoe - rosaceae - led lampen - gewassen, groeifasen - lichtsterkte - energiebesparing - gewaskwaliteit - plantenontwikkeling - horticulture - greenhouse horticulture - ornamental plants - pot plants - illumination - led lamps - crop growth stage - light intensity - energy saving - crop quality - plant development
Bij een aantal siergewassen wordt niet alleen belicht om de productie te verhogen, maar ook om een compacte plantvorm te bevorderen (o.a. bij potchrysant, potroos & kalanchoe). Hoe hoger de intensiteit belichting, hoe compacter het gewas. Met een combinatie van rode en blauwe LED’s (LED RB) kan gestuurd worden op een compactere plantvorm. LED RB bespaart momenteel ±20% energie ten opzicht van de gangbare SON-T armaturen. Als bovendien compactheid bevorderd wordt, dan kan bij die siergewassen waar mede belicht wordt vanwege compactheid de intensiteit belichting ook nog eens omlaag. Qua energiebesparing snijdt het mes dan aan twee kanten. Echter, daar staat tegenover dat het LED RB spectrum de bloei kan vertragen bij korte- en lange dag planten. Door deze teeltvertraging kunnen stengels uiteindelijk zelfs langer worden. Deze studie heeft als doel om door de juiste aansturing van de verschillende fotoreceptoren bloeivertraging tegen te gaan zonder op compactheid in te hoeven leveren.
Right light colour gives plant a boost : research shows relationship light and plant immunity
Velden, P. van; Hofland-Zijlstra, J.D. - \ 2015
In Greenhouses : the international magazine for greenhouse growers 4 (2015)2. - ISSN 2215-0633 - p. 16 - 17.
glastuinbouw - snijbloemen - plantenontwikkeling - belichting - schimmelziekten - ziektebestrijding - reacties - verrood licht - landbouwkundig onderzoek - greenhouse horticulture - cut flowers - plant development - illumination - fungal diseases - disease control - responses - far red light - agricultural research
Light could be an important factor as to whether a plant is sensitive to fungal infestation or not. This is a whole new angle because until now only the relationship with the greenhouse climate was considered: perhaps it’s too dry, too wet, too warm or too cold. Even at a high RH a plant doesn’t need to suffer from disease, according to the researchers Jantineke Hofland-Zijlstra and Luc Stevens. They are carrying out fundamental research on plant immunity in relation to light.
Nieuwe inzichten vereist voor goed sturen op onderhoudsademhaling : onderhoud gaat altijd voor de groei
Elings, A. ; Heuvelink, E. ; Kierkels, T. - \ 2015
Onder Glas 12 (2015)3. - p. 16 - 17.
glastuinbouw - cultuurmethoden - plantkunde - plantenfysiologie - fotosynthese - innovaties - landbouwkundig onderzoek - plantenontwikkeling - temperatuur - greenhouse horticulture - cultural methods - botany - plant physiology - photosynthesis - innovations - agricultural research - plant development - temperature
De verschillende soorten ademhaling bij de plant wekken vaak verwarring. De enige soort waar de teler echt vat op heeft, is de onderhoudsademhaling. Om daar goed op te kunnen sturen, zijn wel nieuwe inzichten noodzakelijk, met name in het verloop over het etmaal.
Sturen met LED-licht maakt potplant niet zomaar compacter : onderzoek bij kalanchoë en potchrysant
Velden, P. van; Eveleens-Clark, B.A. - \ 2015
Onder Glas 12 (2015)9. - p. 18 - 19.
tuinbouw - glastuinbouw - potplanten - kalanchoe - chrysanthemum - groeiremmers - led lampen - landbouwkundig onderzoek - plantenontwikkeling - teeltsystemen - horticulture - greenhouse horticulture - pot plants - growth inhibitors - led lamps - agricultural research - plant development - cropping systems
LED-licht kan als energiebesparende techniek extra meerwaarde krijgen als het ook lukt om met de verschillende kleuren binnen het spectrum de plantkwaliteit te sturen. Voor potplanten zou met name sturen op compactheid een uitkomst zijn. Daarom heeft een onderzoeksteam de korte dag planten kalanchoë en potchrysant onder een vergrootglas gelegd. Daarbij blijkt dat je een goede theorie niet zomaar naar de praktijk vertaalt.
Stuurlicht kan koele teeltperiode bij Phalaenopsis vervangen : andere teelwijze bespaart energie in de zomer
Hoogstraten, K. van; Meinen, E. ; Dueck, T.A. - \ 2015
Onder Glas 12 (2015)4. - p. 10 - 11.
glastuinbouw - teeltsystemen - potplanten - energiebesparing - belichting - verrood licht - rood licht - bloei-inductie - plantenontwikkeling - greenhouse horticulture - cropping systems - pot plants - energy saving - illumination - far red light - red light - flower induction - plant development
Phalaenopsistelers houden in hun teelt een koele periode aan van zo’n zes tot negen weken. Dit stimuleert de knopuitloop en brengt de bloei op gang. In de zomer kost het koelen tot 19°C echter veel energie. Kan het ook anders? Onderzoek wijst uit dat relatief veel rood stuurlicht en minder koeling even goede resultaten oplevert. Bijkomend voordeel is dat het de teelt versnelt.
Biologische klok brengt compactheid zonder chemie dichterbij : hoe gaat plant om met zetmeel en suikers in de nacht?
Krol, S. van der; Heuvelink, E. ; Kierkels, T. - \ 2015
Onder Glas 12 (2015)8. - p. 23 - 25.
glastuinbouw - sierplanten - teeltsystemen - plantenontwikkeling - plantkunde - plantenfysiologie - biologische ritmen - landbouwkundig onderzoek - gewasproductie - greenhouse horticulture - ornamental plants - cropping systems - plant development - botany - plant physiology - biological rhythms - agricultural research - crop production
Meer inzicht in hoe de biologische klok van de plant processen aanstuurt, geeft nieuwe mogelijkheden om groei en bloei te sturen. Het brengt compact houden van pot- en perkplanten met teeltmaatregelen dichterbij. Onderdeel hiervan is een beter begrip van hoe de plant omgaat met zetmeel en suikers in de nacht. Het interessante onderzoek op dit terrein krijgt financiële en praktische ondersteuning van ongekend veel tuinbouwbedrijven.
Check title to add to marked list
<< previous | next >>

Show 20 50 100 records per page

 
Please log in to use this service. Login as Wageningen University & Research user or guest user in upper right hand corner of this page.