Semi-determinate growth habit adjusts the vegetative-to-reproductive balance and increases productivity and water-use efficiency in tomato (Solanum lycopersicum)

Autor(es)

Vicente, Mateus Henrique ^[1] ; Zsoegoen, Agustin ^[1] ; Lopo de Sa, Ariadne Felicio ^[1] ; Ribeiro, Rafael V. ^[2] ; Peres, Lazar E. P. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Escola Super Agr Luiz de Queiroz ESALQ, Dept Biol Sci, Lab Hormonal Control Plant Dev, BR-13418900 Piracicaba, SP - Brazil

^[2] Univ Estadual Campinas, UNICAMP, Inst Biol, Dept Plant Biol, BR-13083862 Campinas, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Journal of Plant Physiology; v. 177, p. 11-19, APR 1 2015.
• Citações Web of Science: 12

Resumo

Tomato (Solanum lycopersicum) shows three growth habits: determinate, indeterminate and semi-determinate. These are controlled mainly by allelic variation in the SELF-PRUNING (SP) gene family, which also includes the ``florigen{''} gene SINGLE FLOWER TRUSS (SFT). Determinate cultivars have synchronized flower and fruit production, which allows mechanical harvesting in the tomato processing industry, whereas indeterminate ones have more vegetative growth with continuous flower and fruit formation, being thus preferred for fresh market tomato production. The semi-determinate growth habit is poorly understood, although there are indications that it combines advantages of determinate and indeterminate growth. Here, we used near-isogenic lines (NILs) in the cultivar Micro-Tom (MT) with different growth habit to characterize semi-determinate growth and to determine its impact on developmental and productivity traits. We show that semi-determinate genotypes are equivalent to determinate ones with extended vegetative growth, which in turn impacts shoot height, number of leaves and either stem diameter or internode length. Semi-determinate plants also tend to increase the highly relevant agronomic parameter Brix x ripe yield (BRY). Water-use efficiency (WUE), evaluated either directly as dry mass produced per amount of water transpired or indirectly through C isotope discrimination, was higher in semi-determinate genotypes. We also provide evidence that the increases in BRY in semi-determinate genotypes are a consequence of an improved balance between vegetative and reproductive growth, a mechanism analogous to the conversion of the overly vegetative tall cereal varieties into well-balanced semi-dwarf ones used in the Green Revolution. (C) 2015 Elsevier GmbH. All rights reserved. (AU)

• Processo FAPESP: 11/16554-0 - Regulação do balanço vegetativo-reprodutivo pelo crescimento semi-determinado em tomateiro (Solanum lycopersicum L. cv Micro-Tom) e seu impacto na produtividade e eficiência no uso da água
• Beneficiário: Mateus Henrique Vicente
• Modalidade de apoio: Bolsas no Brasil - Mestrado
• Processo FAPESP: 13/11541-2 - Interação entre auxina e a família gênica do florígeno no controle da arquitetura e produtividade de tomateiro (Solanum lycopersicum L.)
• Beneficiário: Agustin Zsögön
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado