拟南芥
脱落酸
生物
生长素
下调和上调
细胞生物学
转录因子
侧根
基因
植物激素
RNA干扰
非生物胁迫
基因表达调控
遗传学
突变体
核糖核酸
作者
Byeong Wook Jeon,Jungmook Kim
出处
期刊:Plant Signaling & Behavior
[Informa]
日期:2018-08-20
卷期号:: 1-3
被引量:7
标识
DOI:10.1080/15592324.2018.1507405
摘要
The LATERAL ORGAN BOUNDARIES DOMAIN/ASYMMETRIC LEAVES2-LIKE (LBD/ASL) gene family encode plant-specific transcription factors that regulate various aspects of plant growth and development. Arabidopsis genome has 42 LBD genes. Several LBD genes, such as LBD16, -18, -29, and -33, have been shown to function in lateral root (LR) development via auxin signaling. Although abscisic acid (ABA) is a well-known antistress plant hormone regulating various plant developmental processes, it also plays a role in LR growth regulation. Our recent study showed that LBD14 expression is downregulated by ABA during the entire steps of LR development. The RNAi-induced downregulation and overexpression of LBD14 indicated that LBD14 promotes LR formation. LBD14RNAi enhanced the ABA-induced suppression of LR density compared with the wild type, suggesting that LBD14 is involved in the ABA-mediated control of LR formation. Our study provides an insight into the signaling mechanism of developmental plasticity whereby ABA controls LR branching via LBD14 downregulation under abiotic stress conditions.
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