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Local HY5 Activity Mediates Hypocotyl Growth and Shoot-to-Root Communication

Plant Communications 2020年第5期1卷 64-72页

作者： Yogev Burko christophe gaillochet Adam Seluzicki Joanne Chory Wolfgang Busch Howard Hughes Medical Institute Salk Institute for Biological StudiesLa JollaCA 92037USA Plant Biology Laboratory Salk Institute for Biological Studies10010 North Torrey Pines RoadLa JollaCA 92037USA Integrative Biology Laboratory Salk Institute for Biological Studies10010 North Torrey Pines RoadLa JollaCA 92037USA

Plants optimize their growth in fluctuating environments using information acquired by different *** information is then transmitted through the rest of the plant using both short-and long-distance signals,including hormones and mobile *** a few of these signals have been characterized,long-distance signaling is not well understood in ***,the light-regulated transcription factor HY5 was reported to move from the shoot to the root to regulate root *** generated a cell-type specifically expressed HY5 fusion protein that could not be detected outside the tissue in which it was *** expressing this DOF-HY5 protein in specific cell types of the hypocotyl,we showed that its local activity was sufficient to regulate hypocotyl *** also found that,although DOF-HY5 was expressed specifically in the shoot and not detected in the roots,it could rescue hy5 growth defects in primary roots but not in lateral *** therefore conclude that HY5 protein mobility is not required in the hypocotyl or for shoot-to-root *** results indicate that a signal downstream of,or in parallel with,HY5 in the shoot is mobile and links shoot and root growth.

关键词： HY5 shoot-to-root communication hypocotyl root lateral root Arabidopsis

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