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The impact of plant architecture on tomato (Solanum Lycopersicum L.) yield, water use efficiency and resistance to drought and salt stress

Grant number: 16/05566-0
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): June 01, 2017
Effective date (End): July 31, 2018
Field of knowledge:Biological Sciences - Botany - Pant Physiology
Cooperation agreement: Coordination of Improvement of Higher Education Personnel (CAPES)
Principal researcher:Lázaro Eustaquio Pereira Peres
Grantee:Mateus Henrique Vicente
Home Institution: Escola Superior de Agricultura Luiz de Queiroz (ESALQ). Universidade de São Paulo (USP). Piracicaba , SP, Brazil
Associated research grant:15/50220-2 - Enhancing salt tolerance in tomato crops for advancing sustainable agriculture and food production, AP.TEM


The substantial increase in productivity during the Green Revolution can be attributed to several factors, but the change in partition biomass between vegetative and reproductive organs was the major genetic determinant. However, this physiological interpretation of the genetic components of productivity is still little explored in plant breeding. It was previously shown in our lab that tomato (Solanum lycopersicum L.) genotypes exhibiting semi-determinate growth habit present significant increases in yield and water use efficiency (WUE). Therefore, our working hypothesis is that allelic variations in genes controlling growth habit are actually a way to get a better vegetative-reproductive balance, similar to the conversion of the overly vegetative wheat and rice genotypes into high yield semi-dwarf cultivars during the Green Revolution. In the present study, this hypothesis will be tested by producing tomato (cv. Micro-Tom) near-isogenic lines (NILs) with alterations in the vegetative-reproductive balance through introgression of allelic variations that control not only the growth habit, but also the internode length and the number of leaves per sympodial unit. The performance of the genotypes will be evaluated through quantitative (organ biomass) and qualitative (brix, total acidity and carotenoid content) parameters. WUE will be evaluated both gravimetrically and through carbon isotope discrimination. It will also be assessed the impact of the allelic variations on the performance of plants under drought and saline conditions. The present work integrates basic knowledge of plant physiology and genetics with practical applications, which may generate conceptual gains applicable not only to the tomato, but to other important crops. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
ROBLEDO, JESSENIA M.; MEDEIROS, DAVID; VICENTE, MATEUS H.; AZEVEDO, ARISTEA A.; THOMPSON, ANDREW J.; PERES, LAZARO E. P.; RIBEIRO, DIMAS M.; ARAUJO, WAGNER L.; ZSOGON, AGUSTIN. Control of water-use efficiency by florigen. PLANT CELL AND ENVIRONMENT, v. 43, n. 1, p. 76-86, JAN 2020. Web of Science Citations: 0.
SILVA, WILLIAN B.; VICENTE, MATEUS H.; ROBLEDO, JESSENIA M.; REARTES, DIEGO S.; FERRARI, RENATA C.; BIANCHETTI, RICARDO; ARAUJO, WAGNER L.; FRESCHI, LUCIANO; PERES, LAZARO E. P.; ZSOGON, AGUSTIN. SELF-PRUNING Acts Synergistically with DIAGEOTROPICA to Guide Auxin Responses and Proper Growth Form. Plant Physiology, v. 176, n. 4, p. 2904-2916, APR 2018. Web of Science Citations: 6.

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