Multifaceted roles of LhWRKY44 in promoting anthocyanin accumulation in Asiatic hybrid lilies (Lilium spp.)
文献类型： 外文期刊
第一作者： Bi, Mengmeng
作者： Bi, Mengmeng;Liang, Rui;Wang, Jiawen;Qu, Yuxiao;Liu, Xin;Cao, Yuwei;He, Guoren;Yang, Yue;Yang, Panpan;Xu, Leifeng;Ming, Jun;Liang, Rui;Liu, Xin;Cao, Yuwei;He, Guoren
作者机构： Chinese Acad Agr Sci, Inst Vegetables & Flowers, State Key Lab Vegetable Biobreeding, Beijing 100081, India;Shanxi Agr Univ, Coll Hort, Taigu 030031, Peoples R China;Qingdao Agr Univ, Coll Landscape architecture & Forestry, Qingdao 266109, Peoples R China;Gannan Normal Univ, Coll Chem & Life Sci, Ganzhou 341000, Peoples R China;Shanghai Normal Univ, Coll Life Sci, Shanghai Key Lab Plant Mol Sci, Shanghai 200233, Peoples R China
期刊名称：HORTICULTURE RESEARCH （ 2022影响因子：8.7； 五年影响因子：9.0 ）
ISSN： 2662-6810
年卷期： 2023 年 10 卷 9 期
收录情况： SCI
摘要： The Asiatic hybrid lily (Lilium spp.) is a horticultural crop with high commercial value and diverse anthocyanin pigmentation patterns. However, the regulatory mechanism underlying lily flower color has been largely unexplored. Here, we identified a WRKY transcription factor from lily tepals, LhWRKY44, whose expression was closely associated with anthocyanin accumulation. Functional verification indicated that LhWRKY44 positively regulated anthocyanin accumulation. LhWRKY44 physically interacted with LhMYBSPLATTER and directly bound to the LhMYBSPLATTER promoter, which enhanced the effect of the LhMYBSPLATTER-LhbHLH2 MBW complex activator on anthocyanin accumulation. Moreover, EMSA and dual-luciferase assays revealed that LhWRKY44 activated and bound to the promoters of gene LhF3H and the intracellular anthocyanin-related glutathione S-transferase gene LhGST. Interestingly, our further results showed that LhWRKY44 participated in light and drought-induced anthocyanin accumulation, and improved the drought tolerance in lily via activating stress-related genes. These results generated a multifaceted regulatory mechanism for the LhWRKY44-meditaed enhancement by the environmental signal pathway of anthocyanin accumulation and expanded our understanding of the WRKY-mediated transcriptional regulatory hierarchy modulating anthocyanin accumulation in Asiatic hybrid lilies.
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