Staff Publications

Staff Publications

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    '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.

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Record number 445448
Title Influence of transplant size on the above- and below-ground performance of four contrasting field-grown lettuce cultivars
Author(s) Kerbiriou, P.J.; Stomph, T.J.; Lammerts Van Bueren, E.; Struik, P.C.
Source Frontiers in Plant Science 4 (2013). - ISSN 1664-462X - 16 p.
Department(s) Laboratory of Plant Breeding
Crop and Weed Ecology
Centre for Crop Systems Analysis
Publication type Refereed Article in a scientific journal
Publication year 2013
Keyword(s) n-no3 solution concentration - root-growth - dynamics - plants - light - shoot - water - crop
Abstract Background and aims: Modern lettuce cultivars underperform under conditions of variable temporal and spatial resource availability, common in organic or low-input production systems. Information is scarce on the impact of below-ground traits on such resource acquisition and performance of field-grow nlettuce; exploring genetic variation in such traits might contribute to strategies to select for robust cultivars, i.e., cultivars that perform well in the field, even under stress. Methods: To investigate the impact of below-ground (root development and resource capture) on above-ground (shoot weight, leaf area) traits, different combinations of shoot and root growth were created using transplants of different sizes in three field experiments.Genetic variation in morphological and physiological below- and above-ground responses to different types of transplant shocks was assessed using four cultivars. Results: Transplanting over-developed seedlings did not affect final yield of any of the four cultivars.Small transplant size persistently impacted growth and delayed maturity.The cultivars with overall larger root weights and rooting depth, “Matilda” and “Pronto,”displayed a slightly higher growth rate in the linear phase leading to better yields than “Mariska” which had a smaller root system and a slower linear growth despite a higher maximal exponential growth rate. “Nadine,” which had the highest physiological nitrogen-use efficiency (g dry matter produced per g N accumulated in the head) among the four cultivars used in these trials, gave most stable yields over seasons and trial locations. Conclusions: Robustness was conferred by a large root system exploring deep soil layers. Additional root proliferation generally correlates with improved nitrate capture in a soil layer and cultivars with a larger root system may therefore perform better in harsh environmental conditions; increased nitrogen use efficiency can also confer robustness at low cost for the plant, and secure stable yields under a wide range of growing conditions.
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