Exploring hormonal regulation and candidate genes in leaflet nyctinasty of Averrhoa carambola
文献类型： 外文期刊
作者： You, Le 1 ; Tuo, Wanli 1 ; Wang, Xuexuan 1 ; Huang, Xinyi 2 ; Feng, Baomin 2 ; Fu, Shihan 1 ; Zhai, Junwen 1 ; Ahmad, Sagheer 1 ; Peng, Donghui 1 ; Ren, Hui 3 ; Zhang, Zehuang 4 ; Wu, Shasha 1 ;
作者机构： 1.Fujian Agr & Forestry Univ, Coll Landscape Architecture & Art, Fuzhou 350002, Fujian, Peoples R China
2.Fujian Agr & Forestry Univ, Haixia Inst Sci & Technol, Fuzhou 350002, Fujian, Peoples R China
3.Guangxi Acad Agr Sci, Hort Res Inst, Nanning 530007, Peoples R China
4.Fujian Acad Agr Sci, Fruit Res Inst, Fuzhou 350003, Peoples R China
关键词： Nyctinastic movement; Transcriptome sequencing; Key controlling gene; Averrhoa carambola 'Daguo Tianyangtao2 '
期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.9； 五年影响因子：4.3 ）
ISSN： 0304-4238
年卷期： 2024 年 336 卷
页码：
收录情况： SCI
摘要： Averrhoa carambola, a commonly cultivated tree, exhibits leaflet nyctinastic movement. However, the underlying mechanism remains unclear. The pulvinus, as a motor organ, coordinates the motion of its attached leaflet. During the leaflet expansion, flexor cells shift from contraction to expansion, with concurrent expansion and fusion of vacuole. In contrast, the extensor cells move from expansion to contraction, causing vacuole contraction and increased vacuole numbers. During the process of leaflet expansion and closure, the contents of IAA and IPA in flexor muscles increased significantly, but did not show significant changes in extensor muscles, BR content showed an opposite trend in extensor and flexor muscles, and the content of ZR increased significantly in extensor muscles but decreased significantly in flexor muscles, and ZR content only decreased in extensor muscles, but did not show significant changes in flexor muscles. Exogenous IAA (50-100 mu M) significantly aids in leaflet unfolding during night time. Transcriptome analysis reveals gene enrichment in circadian rhythms, hormone signaling, ion channels, and other pathways during leaflet opening and closure. The expression of AcaCRY3, AcaPHOT1-1, AcaAPRR2, AcaLHY, and AcaAKT1-1 is prominent during expansion, while AcaAUX22-1 stands out during closure. These findings suggest a potential regulatory pathway in A. carambola 'Daguo Tianyangtao 2 ' leaflets, involving light, circadian rhythm, hormone signaling, and ion channels. Findings of this study can do a great deal to broaden the plant nyctinastic movement research.
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