BIL9 Promotes Both Plant Growth via BR Signaling and Drought Stress Resistance by Binding with the Transcription Factor HDG11.

IF 3.9 2区生物学 Q2 CELL BIOLOGY

Plant and Cell Physiology Pub Date : 2024-11-13 DOI:10.1093/pcp/pcae009

Surina Surina, Ayumi Yamagami, Tomoko Miyaji, Zhana Chagan, KwiMi Chung, Nobutaka Mitsuda, Kaisei Nishida, Ryo Tachibana, Zhangliang Zhu, Takuya Miyakawa, Kazuo Shinozaki, Masaaki Sakuta, Tadao Asami, Takeshi Nakano

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Abstract

Drought stress is a major threat leading to global plant and crop losses in the context of the climate change crisis. Brassinosteroids (BRs) are plant steroid hormones, and the BR signaling mechanism in plant development has been well elucidated. Nevertheless, the specific mechanisms of BR signaling in drought stress are still unclear. Here, we identify a novel Arabidopsis gene, BRZ INSENSITIVE LONG HYPOCOTYL 9 (BIL9), which promotes plant growth via BR signaling. Overexpression of BIL9 enhances drought and mannitol stress resistance and increases the expression of drought-responsive genes. BIL9 protein is induced by dehydration and interacts with the HD-Zip IV transcription factor HOMEODOMAIN GLABROUS 11 (HDG11), which is known to promote plant resistance to drought stress, in vitro and in vivo. BIL9 enhanced the transcriptional activity of HDG11 for drought-stress-resistant genes. BIL9 is a novel BR signaling factor that enhances both plant growth and plant drought resistance.

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BIL9 通过与转录因子 HDG11 结合，通过 BR 信号转导促进植物生长并提高抗旱性。

在气候变化危机的背景下，干旱胁迫是导致全球植物和作物损失的主要威胁。芸苔素甾醇（BRs）是植物甾体激素，BR在植物生长发育中的信号转导机制已被阐明。然而，干旱胁迫下芸薹素类固醇信号转导的具体机制仍不清楚。在这里，我们发现了一个新的拟南芥基因--BRZ INSENSITIVE LONG HYPOCOTYL 9（BIL9），它能通过BR信号促进植物生长。过表达 BIL9 可增强干旱和甘露醇胁迫抗性，并增加干旱响应基因的表达。BIL9 蛋白由脱水诱导，并与 HD-Zip IV 转录因子 HOMEODOMAIN GLABROUS 11（HDG11）相互作用，HDG11 在体外和体内都能促进植物对干旱胁迫的抗性。BIL9 增强了 HDG11 对抗旱基因的转录活性。BIL9是一种新型的BR信号转导因子，它既能促进植物生长，又能增强植物的抗旱性。

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来源期刊

Plant and Cell Physiology 生物-细胞生物学

CiteScore

8.40

自引率

4.10%

发文量

166

审稿时长

1.7 months

期刊介绍： Plant & Cell Physiology (PCP) was established in 1959 and is the official journal of the Japanese Society of Plant Physiologists (JSPP). The title reflects the journal''s original interest and scope to encompass research not just at the whole-organism level but also at the cellular and subcellular levels. Amongst the broad range of topics covered by this international journal, readers will find the very best original research on plant physiology, biochemistry, cell biology, molecular genetics, epigenetics, biotechnology, bioinformatics and –omics; as well as how plants respond to and interact with their environment (abiotic and biotic factors), and the biology of photosynthetic microorganisms.