原基
腋芽
分生组织
生物
突变体
穗
水稻
水稻
支化(高分子化学)
植物
拟南芥
细胞生物学
开枪
遗传学
园艺
基因
组织培养
体外
复合材料
材料科学
作者
Hiroaki Tabuchi,Yu Zhang,Satoshi Hattori,Minami Omae,Sae Shimizu-Sato,Tetsuo Oikawa,Qian Qian,Masaharu Nishimura,Hidemi Kitano,He Xie,Xiaohua Fang,Hitoshi Yoshida,Junko Kyozuka,Fan Chen,Yutaka Satō
出处
期刊:The Plant Cell
[Oxford University Press]
日期:2011-09-01
卷期号:23 (9): 3276-3287
被引量:207
标识
DOI:10.1105/tpc.111.088765
摘要
Abstract Aerial architecture in higher plants is dependent on the activity of the shoot apical meristem (SAM) and axillary meristems (AMs). The SAM produces a main shoot and leaf primordia, while AMs are generated at the axils of leaf primordia and give rise to branches and flowers. Therefore, the formation of AMs is a critical step in the construction of plant architecture. Here, we characterized the rice (Oryza sativa) lax panicle2 (lax2) mutant, which has altered AM formation. LAX2 regulates the branching of the aboveground parts of a rice plant throughout plant development, except for the primary branch in the panicle. The lax2 mutant is similar to lax panicle1 (lax1) in that it lacks an AM in most of the lateral branching of the panicle and has a reduced number of AMs at the vegetative stage. The lax1 lax2 double mutant synergistically enhances the reduced-branching phenotype, indicating the presence of multiple pathways for branching. LAX2 encodes a nuclear protein that contains a plant-specific conserved domain and physically interacts with LAX1. We propose that LAX2 is a novel factor that acts together with LAX1 in rice to regulate the process of AM formation.
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