Role of LBD14 during ABA-mediated control of root system architecture in Arabidopsis
Role of LBD14 during ABA-mediated control of root system architecture in Arabidopsis
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DOI：
10.1080/15592324.2018.1507405
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发表时间：
2018-01-01
影响因子：
2.9
通讯作者：
Kim, Jungmook
中科院分区：
文献类型：
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作者：
Jeon, Byeong Wook;Kim, Jungmook
LBD/ASL基因家族编码植物特有的转录因子，调节植物生长发育的各个方面。拟南芥基因组有42个LBD基因。一些LBD基因，如LBD16、-18、-29和-33，已被证明通过生长素信号在侧根发育中发挥作用。虽然脱落酸(ABA)是一种广为人知的抗逆境激素，调节植物的各种发育过程，但它也在LR的生长调节中发挥作用。我们最近的研究表明，在LR发育的整个过程中，LBD14的表达都受到ABA的下调。RNAi诱导的LBD14的下调和过表达表明LBD14促进了LR的形成。与野生型相比，LBD14RNAi增强了ABA诱导的LR密度的抑制，表明LBD14参与了ABA介导的LR形成的控制。我们的研究揭示了在非生物胁迫条件下，ABA通过下调LBD14调控LR分支的发育可塑性的信号机制。
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.