Record Details

Complex and shifting interactions of phytochromes regulate fruit development in tomato

OAR@ICRISAT

View Archive Info
 
 
Field Value
 
Relation http://oar.icrisat.org/7398/
http://dx.doi.org/10.1111/pce.12279
10.1111/pce.12279
 
Title Complex and shifting interactions of phytochromes regulate fruit development in tomato
 
Creator Gupta, Suresh Kumar
Sharma, S
Santisree, P
Kilambi, H V
Appenroth, K
Sreelakshmi, Y
Sharma, R
 
Subject Agriculture-Farming, Production, Technology, Economics
 
Description Tomato fruit ripening is a complex metabolic process regulated by a genetical hierarchy. A subset of this process is also modulated by light-signaling, as mutants encoding negative regulators of phytochrome signal transduction, show higher accumulation of carotenoids. In tomato phytochromes are encoded by a multi-gene family, namely PhyA, PhyB1, PhyB2, PhyE and PhyF, however, their contribution to fruit development and ripening has not been examined. Using single phytochrome mutants- phyA, phyB1 and phyB2 and multiple mutants- phyAB1, phyB1B2 and phyAB1B2, we compared the on-vine transitory phases of ripening till fruit abscission. The phyAB1B2 mutant showed accelerated transitions during ripening with shortest time to fruit abscission. Comparison of transition intervals in mutants indicated a phase-specific influence of different phytochrome species either singly or in combination on the ripening process. Examination of off-vine ripened fruits indicated that ripening specific carotenoid accumulation was not obligatorily dependent on light and even dark incubated fruits accumulated carotenoids. The accumulation of transcripts and carotenoids in off-vine and on-vine ripened mutant fruits indicated a complex and shifting phase-dependent modulation by phytochromes(s). Our results indicate that in addition to regulating carotenoid levels in tomato fruits, phytochrome(s) also regulate the time required for phase transitions during ripening.
 
Publisher John Wiley & Sons
 
Date 2013
 
Type Article
PeerReviewed
 
Format application/pdf
 
Language en
 
Rights —
 
Identifier http://oar.icrisat.org/7398/1/Pre-print_Guptaetal_Complex%20_2013.pdf
Gupta, Suresh Kumar and Sharma, S and Santisree, P and Kilambi, H V and Appenroth, K and Sreelakshmi, Y and Sharma, R (2013) Complex and shifting interactions of phytochromes regulate fruit development in tomato. Plant, Cell & Environment. pp. 1-57. ISSN 1365-3040