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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

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

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Author(s):
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]
Total Authors: 10
Affiliation:
[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
Total Affiliations: 4
Document type: Journal article
Source: Plant Physiology; v. 176, n. 4, p. 2904-2916, APR 2018.
Web of Science Citations: 6
Abstract

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)

FAPESP's process: 13/11541-2 - Interaction between auxin and the florigen gene family in the control of architecture and yield in tomato (Solanum lycopersicum L.)
Grantee:Agustin Zsögön
Support Opportunities: Scholarships in Brazil - Post-Doctoral
FAPESP's process: 13/18056-2 - Interaction between light, hormonal and nitric oxide signaling during plastidial biogenesis and differentiation and nutraceutical compounds accumulation in tomato fruits
Grantee:Luciano Freschi
Support Opportunities: Regular Research Grants
FAPESP's process: 15/50220-2 - Enhancing salt tolerance in tomato crops for advancing sustainable agriculture and food production
Grantee:Lázaro Eustaquio Pereira Peres
Support Opportunities: Research Projects - Thematic Grants
FAPESP's process: 16/05566-0 - The impact of plant architecture on tomato (Solanum Lycopersicum L.) yield, water use efficiency and resistance to drought and salt stress
Grantee:Mateus Henrique Vicente
Support Opportunities: Scholarships in Brazil - Doctorate