SELF-PRUNING Acts Synergistically with DIAGEOTROPICA to Guide Auxin Responses and Proper Growth Form

Autor(es)

Silva, Willian B. ^[1] ; Vicente, Mateus H. ^[2] ; Robledo, Jessenia M. ^[1] ; Reartes, Diego S. ^[2] ; Ferrari, Renata C. ^[3] ; Bianchetti, Ricardo ^[3] ; Araujo, Wagner L. ^[4] ; Freschi, Luciano ^[3] ; Peres, Lazaro E. P. ^[2] ; Zsogon, Agustin ^[1]

Afiliação do(s) autor(es)

^[1] Univ Fed Vicosa, Dept Biol Vegetal, BR-36570900 Vicosa, MG - Brazil

^[2] Univ Sao Paulo, Escola Super Agr Luiz Queiroz, Dept Ciencias Biol, Lab Hormonal Control Plant Dev, CP 09, BR-13418900 Piracicaba, SP - Brazil

^[3] Univ Sao Paulo, Inst Biociencias, BR-05508900 Sao Paulo - Brazil

^[4] Univ Fed Vicosa, Dept Biol Vegetal, Max Planck Partner Grp, BR-36570900 Vicosa, MG - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Plant Physiology; v. 176, n. 4, p. 2904-2916, APR 2018.
• Citações Web of Science: 6

Resumo

The SELF PRUNING (SP) gene is a key regulator of growth habit in tomato (Solanum lycopersicum). It is an ortholog of TERMINAL FLOWER1, a phosphatidylethanolamine-binding protein with antiflorigenic activity in Arabidopsis (Arabidopsis thaliana). A spontaneous loss-of-function mutation (sp) has been bred into several industrial tomato cultivars, as it produces a suite of pleiotropic effects that are favorable for mechanical harvesting, including determinate growth habit, short plant stature, and simultaneous fruit ripening. However, the physiological basis for these phenotypic differences has not been thoroughly explained. Here, we show that the sp mutation alters polar auxin transport as well as auxin responses, such as gravitropic curvature and elongation of excised hypocotyl segments. We also demonstrate that free auxin levels and auxin-regulated gene expression patterns are altered in sp mutants. Furthermore, diageotropica, a mutation in a gene encoding a cyclophilin A protein, appears to confer epistatic effects with sp. Our results indicate that SP affects the tomato growth habit at least in part by influencing auxin transport and responsiveness. These findings suggest potential novel targets that could be manipulated for controlling plant growth habit and improving productivity. (AU)

• 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
• Processo FAPESP: 13/18056-2 - Interação entre a sinalização luminosa, hormonal e do óxido nítrico durante a biogênese e diferenciação plastidial e acúmulo de compostos nutracêuticos em frutos de tomateiro
• Beneficiário: Luciano Freschi
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 15/50220-2 - Enhancing salt tolerance in tomato crops for advancing sustainable agriculture and food production
• Beneficiário: Lázaro Eustaquio Pereira Peres
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 16/05566-0 - Impacto da arquitetura vegetal do tomateiro (Solanum lycopersicum l.) sobre a produtividade, eficiência do uso da água e resistência aos estresses por seca e salinidade
• Beneficiário: Mateus Henrique Vicente
• Modalidade de apoio: Bolsas no Brasil - Doutorado