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 554340
Title Far-red radiation increases dry mass partitioning to fruits but reduces Botrytis cinerea resistance in tomato
Author(s) Ji, Yongran; Ouzounis, Theoharis; Courbier, Sarah; Kaiser, Elias; Nguyen, Phuong T.; Schouten, Henk J.; Visser, Richard G.F.; Pierik, Ronald; Marcelis, Leo F.M.; Heuvelink, Ep
Source Environmental and Experimental Botany 168 (2019). - ISSN 0098-8472
DOI https://doi.org/10.1016/j.envexpbot.2019.103889
Department(s) Horticulture & Product Physiology
PE&RC
Laboratory of Genetics
Plant Breeding
EPS
Plant Breeding
Publication type Refereed Article in a scientific journal
Publication year 2019
Keyword(s) Botrytis cinerea - Dry mass partitioning - Far red - Growth component analysis - LED lighting - Solanum lycopersicum
Abstract

The addition of far-red (FR, 700–800 nm) radiation to standard growth light triggers a set of photomorphogenic responses collectively termed shade avoidance syndrome. Recent research showed that additional FR increased fruit yield in greenhouse tomato production. However, the mechanism behind this increase is not clear; nor is it known whether there is a trade-off between growth and defense against plant diseases in tomato under additional FR. The aims of this study were 1) to quantify the effect of additional FR on tomato fruit growth, 2) to explain this effect based on underlying growth components and 3) to examine the FR effect on resistance against the necrotrophic fungus Botrytis cinerea. Tomato (Solanum lycopersicum ‘Moneymaker’) plants were grown for four months with 30 or 50 μmol m−2 s−1 of FR added to 150 μmol m−2 s−1 red + blue or white background LED lighting. Growth and development parameters were recorded, and a growth component analysis was conducted. Bioassays for resistance against B. cinerea were conducted on leaf samples collected from each light treatment. Additional FR increased total fruit dry mass per plant by 26–45%. FR affected multiple growth components, among which the fraction of dry mass partitioned to fruits was the most prominent with a 15–35% increase. Truss appearance rate was increased 11–14% by FR while instantaneous net photosynthesis rate was not affected. FR also resulted in more severe disease symptoms upon infection with B. cinerea. In conclusion, additional FR increases tomato fruit production mainly by increasing dry mass partitioning to fruits, rather than improving photosynthesis or increasing total plant biomass. However, FR also reduces resistance of tomato leaves against B. cinerea.

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