Cytokinin accumulation and flowering gene expression are orchestrated for floral meristem development in longan (Dimocarpus longan Lour.) after chemical flower induction
作者： Patrick Winterhagen , Martin Hegele , Pimsiri Tiyayon , Jens N. Wünsche
DOI: 10.1016/J.SCIENTA.2020.109467
关键词:
摘要: Abstract Under non-inductive environmental conditions longan trees (Dimocarpus Lour.) were subjected to potassium chlorate (KClO3) applications, solely or in combination with shoot girdling defoliation treatments, induce flowering. Treated showed visible flower buds four weeks after treatment, while untreated reference remained vegetative. Trees treated KClO3 and apical flowered terminally at the apex. treatment caused flowering exclusively lateral immediately below girdle. Results from histological hormone analyses are integrated gene expression data build a comprehensive time course model for chemical induction longan. The increased cytokinin concentration apex tissues, likely due de novo biosynthesis translocation, corresponds transient up-regulation of promoting Dimocarpus FLOWERING LOCUS 1 (DlFT1) mature leaves treatment. Both occur during presumed period approximately 10 days Subsequently, some delay floral homeotic genes APETALA (DlAP1) up-regulated indicating bud development, which coincides meristems specimen. specific accumulation pattern suggest tight orchestration hormonal genetic pathways chemically induced
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