<p id="C3">Drought threatens global agricultural production and limits the prospects for sustainable agricultural development. Plant leaf epidermis plays a vital role in the process of growth, development, and resistance to adversity stress, and water and gas exchange with the external environment. In this study, compared with the wild-type Zhonghua 11 (ZH11), we found that mutants <italic>less pronounced lobe epidermal cell 2-1</italic> (<italic>lpl2-1</italic>) and<italic> less pronounced lobe epidermal cell 2-2</italic> (<italic>lpl2-2</italic>) were more sensitive to drought and salt stress response, and the survival rate after rewatering was extremely significantly reduced, which was less than half of the control. Compared with ZH11, <italic>lpl2-1 </italic>and<italic> lpl2-2</italic> had shorter plant height, shorter root length, significantly increased stomatal density and stomatal openings in the same phyllodes, and the serrated lobe of the epidermal cell margin becomes smoother, and the epidermal cell nesting was not tight, which might result in faster and more water loss of <italic>lpl2-1</italic> and <italic>lpl2-2</italic> than ZH11. The water loss experiment of separated leaves also proved that the water loss rate of <italic>lpl2-1</italic> and <italic>lpl2-2</italic> leaves was higher than that of the ZH11 in equal time. Overexpression of <italic>OsLPL2</italic> was transferred into <italic>lpl2-1</italic>, and the <italic>OE-OsLPL2</italic>/<italic>lpl2-1</italic> transgenic positive plants recovered the smooth epidermis of <italic>lpl2-1</italic> and the sensitive phenotype to drought and salt stress. These results showed that <italic>OsLPL2</italic> gene not only controlled the microfilament synthesis and morphogenesis of rice epidermal cells, but also played a key role in response to plant stress by regulating stomatal density, stomatal conductance, and root growth and development. This study provides a theoretical basis for revealing the molecular regulation mechanism of <italic>OsLPL2</italic> in response to drought stress in rice.

Wen-Qi ZHOU

Xiao-Xia QIANG

Sen WANG

Jing-Wen JIANG

Wan-Rong WEI

ACTA AGRONOMICA SINICA

The major aims of AAS are to report the progresses in the disciplines of crop breeding, crop genetics, crop cultivation, crop physiology, ecology, biochemistry, germplasm resources, grain chemistry, grain storage and processing, bio-technology and biomathematics etc. mainly in China and abroad. AAS provides regular columns for Original papers, Reviews, and Research notes. The strict peer-review procedure guarantees the academic level and raises the reputation of the journal. The readership of AAS is for crop science researchers, students of agricultural colleges and universities, and persons with similar academic level.

The primary aim of Acta Agronomica Sinica(China) is to report advancements in the fields of crop breeding, crop genetics, crop cultivation, crop physiology, ecology, biochemistry, germplasm resources, grain chemistry, grain storage and processing, biotechnology, and biomathematics, focusing mainly on research in China and abroad. The journal features regular columns for original papers, reviews, and research notes. A strict peer-review process ensures high academic standards and enhances the journal's reputation. The readership of Acta Agronomica Sinica(China) includes crop science researchers, students from agricultural colleges and universities, and individuals with similar academic backgrounds.

《Acta Agronomica Sinica(China)》的主要目标是报告作物育种、作物遗传学、作物栽培、作物生理学、生态学、生物化学、种质资源、粮食化学、粮食储存与加工、生物技术和生物数学等学科的进展，主要关注中国及国外的研究动态。该期刊设有原创论文、综述和研究笔记等常规栏目。严格的同行评审程序确保了学术水平，并提升了期刊的声誉。《Acta Agronomica Sinica(China)》的读者主要是作物科学研究人员、农业院校和大学的学生，以及具有相似学术水平的人员。

Mechanism of drought and salt tolerance of <italic>OsLPL2/PIR </italic>gene in rice

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Mechanism of drought and salt tolerance of &lt;italic&gt;OsLPL2/PIR &lt;/italic&gt;gene in rice

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Mechanism of drought and salt tolerance of <italic>OsLPL2/PIR </italic>gene in rice