Gibberellins accumulate in the elongating endodermal cells of Arabidopsis root

被引:160
作者
Shani, Eilon [1 ]
Weinstain, Roy [2 ]
Zhang, Yi [1 ]
Castillejo, Cristina [1 ]
Kaiserli, Eirini [5 ]
Chory, Joanne [5 ,6 ]
Tsien, Roger Y. [2 ,3 ,4 ]
Estelle, Mark [1 ,4 ]
机构
[1] Univ Calif San Diego, Sect Cell & Dev Biol, La Jolla, CA 92093 USA
[2] Univ Calif San Diego, Dept Pharmacol, La Jolla, CA 92093 USA
[3] Univ Calif San Diego, Dept Chem & Biochem, La Jolla, CA 92093 USA
[4] Univ Calif San Diego, Howard Hughes Med Inst, La Jolla, CA 92093 USA
[5] Salk Inst Biol Studies, Plant Biol Lab, La Jolla, CA 92037 USA
[6] Salk Inst Biol Studies, Howard Hughes Med Inst, La Jolla, CA 92037 USA
基金
美国国家科学基金会; 美国国家卫生研究院;
关键词
root development; ethylene; root growth; fluorescent labeling; hormone labeling; SCARECROW-LIKE; 3; PLANT DEVELOPMENT; RECEPTOR GID1; GROWTH; ETHYLENE; DELLA; ACID; BIOSYNTHESIS; PROTEIN; AUXIN;
D O I
10.1073/pnas.1300436110
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Plant hormones are small-molecule signaling compounds that are collectively involved in all aspects of plant growth and development. Unlike animals, plants actively regulate the spatial distribution of several of their hormones. For example, auxin transport results in the formation of auxin maxima that have a key role in developmental patterning. However, the spatial distribution of the other plant hormones, including gibberellic acid (GA), is largely unknown. To address this, we generated two bioactive fluorescent GA compounds and studied their distribution in Arabidopsis thaliana roots. The labeled GAs specifically accumulated in the endodermal cells of the root elongation zone. Pharmacological studies, along with examination of mutants affected in endodermal specification, indicate that GA accumulation is an active and highly regulated process. Our results strongly suggest the presence of an active GA transport mechanism that would represent an additional level of GA regulation.
引用
收藏
页码:4834 / 4839
页数:6
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