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The NAC transcription factor LpNAC48 promotes trichome formation in Lilium pumilum

文献类型： 外文期刊

作者： Xin, Yin 1 ; Pan, Wenqiang 1 ; Zhao, Yajie 2 ; Yang, Chenglong 3 ; Li, Jingru 2 ; Wang, Shaokun 2 ; Wu, Jingxiang 1 ; Zhang, Mingfang 1 ; Shi, Jinxin 2 ; Ma, Yang 1 ; Fang, Shaozhong 3 ; Liang, Yuwei 4 ; Zaccai, Michele 5 ; Zhang, Xiuhai 1 ; Du, Yunpeng 1 ; Wu, Jian 2 ;

作者机构： 1.Beijing Acad Agr & Forestry Sci, Inst Grassland Flowers & Ecol, Beijing 100097, Peoples R China

2.China Agr Univ, Dept Ornamental Hort, Beijing Key Lab Dev & Qual Control Ornamental Crop, Beijing 100193, Peoples R China

3.Fujian Acad Agr Sci, Inst Biotechnol, Fuzhou 350003, Peoples R China

4.Zhejiang Univ, Coll Agr & Biotechnol, Dept Hort, Hangzhou 310058, Peoples R China

5.Ben Gurion Univ Negev, Dept Life Sci, IL-8410501 Beer Sheva, Israel

期刊名称：PLANT PHYSIOLOGY （ 影响因子：6.9； 五年影响因子：7.7 ）

ISSN： 0032-0889

年卷期： 2025 年 197 卷 1 期

页码：

收录情况： SCI

摘要： Trichomes play a crucial role in plant resistance to abiotic and biotic stresses, and their development and characteristics vary across different species. This study demonstrates that trichomes of Lilium pumilum exhibit synchronized growth during flower bud differentiation and enhance the plant's adaptability to UV-B radiation and aphid infection. We identified LpNAC48, a NAC family transcription factor (TF), that interacted with the B-box (BBX) family TF LpBBX28 during trichome formation in L. pumilum. Silencing LpNAC48 or LpBBX28 impaired trichome development and reduced trichome density on the outer perianths. We demonstrated that the upstream regulators LpNAC48 and LpBBX28 directly bound to the promoter of the bHLH TF-encoding gene LpGL3-LIKE (LpGL3L) to activate its expression. Moreover, an ABA-responsive element within a 259-bp DNA variation in the LpNAC48 promoter was important for its expression and was bound by the bZIP TF LpbZIP29 during trichome development. This binding activated LpNAC48 expression and contributed to trichome formation. This study provides insights into the role of a small DNA sequence variation in gene expression and trichome traits. Three key transcription factors compose a regulatory module that promotes trichome formation in lily.

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