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HANABA TARANU Is a GATA Transcription Factor That Regulates Shoot Apical Meristem and Flower Development in Arabidopsis

Zhao, Yusnxiang and Medrano, Leonard and Ohashi, Kazuaki and Fletcher, Jennifer C. and Yu, Hao and Sakai, Hajime and Meyerowitz, Elliot M. (2004) HANABA TARANU Is a GATA Transcription Factor That Regulates Shoot Apical Meristem and Flower Development in Arabidopsis. Plant Cell, 16 (10). pp. 2586-2600. ISSN 1040-4651. PMCID PMC520957.

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We have isolated a new mutant, hanaba taranu (han), which affects both flower and shoot apical meristem (SAM) development in Arabidopsis thaliana. Mutants have fused sepals and reduced organ numbers in all four whorls, especially in the 2nd (petal) and 3rd (stamen) whorls. han meristems can become flatter or smaller than in the wild type. HAN encodes a GATA-3–like transcription factor with a single zinc finger domain. HAN is transcribed at the boundaries between the meristem and its newly initiated organ primordia and at the boundaries between different floral whorls. It is also expressed in vascular tissues, developing ovules and stamens, and in the embryo. han interacts strongly with clavata (clv) mutations (clv1, clv2, and clv3), resulting in highly fasciated SAMs, and we find that WUS expression is altered in han mutants from early embryogenesis. In addition, HAN is ectopically expressed both in clv1 and clv3 mutants. We propose that HAN is normally required for establishing organ boundaries in shoots and flowers and for controlling the number and position of WUS-expressing cells. Ectopic HAN expression causes growth retardation, aberrant cell division patterns, and loss of meristem activity, suggesting that HAN is involved in controlling cell proliferation and differentiation.

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http:/​/​dx.​doi.​org/​10.​1105/​tpc.​104.​024869DOIArticle Data CentralArticle
Meyerowitz, Elliot M.0000-0003-4798-5153
Additional Information:© 2004 American Society of Plant Biologists. Received June 2, 2004. Accepted July 10, 2004. Published September 14, 2004. We thank Ken Feldmann for allowing us to screen his T-DNA population, which resulted in the isolation of han-1, and Steven Clark for providing us with the han-2 allele. We also thank our laboratory colleagues and Robert Williams for their critical reading of the manuscript. This project is sponsored by National Science Foundation Grant IBN-0211670 to E.M.M.
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Issue or Number:10
PubMed Central ID:PMC520957
Record Number:CaltechAUTHORS:20161202-074617375
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72511
Deposited By: Ruth Sustaita
Deposited On:02 Dec 2016 23:21
Last Modified:03 Oct 2019 16:18

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