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Auxin regulates bulbil development by affecting carbohydrate metabolism in Lilium lancifolium

文献类型： 外文期刊

作者： Wang, Mengdi 1 ; Li, Jiamin 1 ; Pan, Wenqiang 2 ; Sang, Qianzi 2 ; Liang, Jiahui 2 ; Zhang, Xuemin 1 ; Kang, Shengnan 1 ; Zhang, Mingfang 2 ; Zhang, Xiuhai 2 ; Yu, Xiaonan 1 ; Du, Yunpeng 2 ;

作者机构： 1.Beijing Forestry Univ, Coll Landscape Architecture, Beijing 100083, Peoples R China

2.Beijing Acad Agr & Forestry Sci, Inst Grassland Flowers & Ecol, Beijing 100097, Peoples R China

3.Natl Forestry & Grassland, Ornamental & Edible Lily Engn Res Ctr, Beijing 100097, Peoples R China

4.Yanbian Univ, Coll Agr, Yanji 133002, Peoples R China

关键词： Lilium lancifolium; Bulbil development; Transcriptome; Auxin; Carbohydrate metabolism

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.2； 五年影响因子：4.6 ）

ISSN： 0304-4238

年卷期： 2025 年 341 卷

页码：

收录情况： SCI

摘要： Lily bulbils originate from the leaf axils of the middle and upper stems of lilies and play an important role in the reproduction of triploid Lilium lancifolium. The development process of lily bulbils results from cell division and expansion, but the roles of plant hormones and carbohydrate metabolism remains unclear. In this study, we treated L. lancifolium with exogenous indole-3-acetic acid (IAA) and the auxin polar transport inhibitor N-1naphthylphthalamic acid (NPA) and analyzed morphology, transcriptomics, and gene function during bulbil development. The IAA treatment increased the bulbil diameter and total weight per plant, promoting bulbil development. By constructing an association network of characters and modules, we found that bulbil diameter was significantly negatively correlated with the black module genes and positively correlated with the yellow module genes, which are related to plant hormone and carbohydrate metabolism. We identified key genes in the bulblet system due to bulbil and bulblet development similarities. Silencing the LlSAUR36 and LlIAA10 genes in the auxin signaling pathway inhibited bulblet development. In the carbohydrate metabolism pathway, we identified two key genes using silencing methods, LlTPS1 and LlCSLC5, resulting in phenotypes similar to LlSAUR36 and LlIAA10, which inhibited bulbil development. In conclusion, auxin signaling engages in the bulbil development of L. lancifolium by regulating key carbohydrate metabolism genes. This study provides a molecular basis for developing lily bulbils and offers useful clues for the future development of new lily bulbil production methods.

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