Auxin response and transport during induction of pedicel abscission in tomato
作者机构：Department of HorticultureShenyang Agricultural UniversityShenyang 110866China Department of Plant SciencesUniversity of CaliforniaDavisCA 95616USA Department of Ornamental HorticultureCollege of HorticultureChina Agricultural UniversityBeijing 100193China Crops Pathology&Genetic Research UnitUSDA-ARSDavisCA 95616USA
出 版 物：《Horticulture Research》 (园艺研究（英文）)
年 卷 期：2021年第8卷第1期
页 面：2814-2822页
核心收录：
学科分类：09[农学] 0902[农学-园艺学] 090202[农学-蔬菜学]
基 金：This work was supported by the National Key Research and Development Program of China(2018YFD1000800) the National Natural Science Foundation of China(31991184,31672197) China Scholarship Council
主 题：distribution transport flowers
摘 要：Auxin plays a central role in control of organ abscission,and it is thought that changes in the auxin gradient across the abscission zone are the primary determinant of the onset of *** nature of this gradient,whether in concentration,flow,or perhaps in the response system has not conclusively been *** employed a DR5::GUS auxin response reporter system to examine the temporal and spatial distribution of the auxin response activity in response to developmental and environmental cues during pedicel abscission in *** pedicels of young and fully open flowers,auxin response,as indicated by GUS activity,was predominantly detected in the vascular tissues and was almost entirely confined to the abscission zone(AZ)and to the distal portion of the pedicel,with a striking reduction in the proximal tissues below the AZ-a‘step’,rather than a *** pollination and during early fruit development,auxin response increased substantially throughout the *** in GUS activity following treatments that caused pedicel abscission(flower removal,high temperature,darkness,ethylene,or N-1-naphthylphthalamic acid(NPA)treatment)were relatively minor,with reduced auxin response in the AZ and some reduction above and below *** of genes encoding some auxin efflux carriers(PIN)and influx carriers(AUX⁄LAX)was substantially reduced in the abscission zone of NPA-treated pedicels,and in pedicels stimulated to abscise by flower *** results suggest that changes in auxin flow distribution through the abscission zone are likely more important than the auxin response system in the regulation of abscission.
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