Flower development in the passion fruit Passiflora edulis requires a photoperiod-induced systemic graft-transmissible signal

Plant, Cell & Environment
Nahum NaveAlon Samach

Abstract

Different organisms use gradual seasonal changes in photoperiod to correctly time diverse developmental processes, such as transition to flowering in plants. Florigen is a systemic signal formed in leaves exposed to specific environmental cues, mainly photoperiodic, and capable of triggering flower induction in several species. Here we show that in Passiflora edulis, a perennial climbing vine, flower initiation occurs throughout the year; however, without long photoperiods, flower primordia show arrested growth and differentiation at an early stage. Our results support the existence of a positive, systemic, graft-transmissible signal, produced in mature leaves under LDs, that is required for normal flower development beyond sepal formation. Our results also suggest that Gibberellin acts to inhibit flower development. We provide evidence for genetic variation in the response to short photoperiods. A genotype capable of forming developed flowers under short photoperiods produces a positive graft transmissible signal allowing normal flower development under short days in a cultivar which normally aborts flower development under these conditions. We believe these findings contribute towards discovering the chemical nature of this i...Continue Reading

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Citations

Jan 18, 2012·Journal of Agricultural and Food Chemistry·Livnat GoldenbergEdna Pesis
Apr 27, 2012·Comparative and Functional Genomics·Lucas Cutri, Marcelo Carnier Dornelas
Apr 23, 2013·Plant Science : an International Journal of Experimental Plant Biology·Alon Samach, Harley M Smith
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Apr 19, 2018·Frontiers in Plant Science·Mariane S Sousa-BaenaLúcia G Lohmann
Apr 20, 2019·Frontiers in Plant Science·Ben Spitzer-RimonRina Kamenetsky
Sep 5, 2019·American Journal of Botany·José Hernandes-LopesGladys Flavia de Albuquerque Melo-de-Pinna
Jan 26, 2021·Plant Science : an International Journal of Experimental Plant Biology·Qiaoxia LiChaoying He

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