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外源赤霉素刺激生长的生理和转录组响应。

Physiological and Transcriptomic Responses of Growth in Stimulated by Exogenous Gibberellins.

机构信息

State Key Laboratory for Conservation and Utilization of Subtropical Agro-Bioresources, South China Agricultural University, Guangzhou 510642, China.

Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architectures, South China Agricultural University, Guangzhou 510642, China.

出版信息

Int J Mol Sci. 2022 Oct 6;23(19):11842. doi: 10.3390/ijms231911842.

DOI:10.3390/ijms231911842
PMID:36233144
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9569647/
Abstract

(1) The phytohormones gibberellins (GAs) play a crucial role in plant growth and development, such as seed germination, flowering, fruiting, and stem elongation. Although many biological roles of GAs have been studied intensively, the molecular mechanisms of GAs in woody plants are still unclear. (2) In this study, we investigated the effects of exogenous application of GAs on . (3) The height and biomass of increased after 7 days of GA treatment, especially on the second internode. Transcriptome analysis showed that although the majority of genes involved in the GA signaling pathway were up-regulated, the expression of GA20 oxidase (GA20ox) and GA3 oxidase (GA3ox) was down-regulated in the 3 days GA-treated group compared to the CK group. The expression of the cell elongation-related basic helix-loop-helix genes and was up-regulated in the GA-treated group compared with the CK group. Transcriptional expression levels of transcription factors involved in hormone signaling were changed, mainly including bHLH, ethylene response factor (ERF), and WRKY families. In addition, the transcriptional expression level of the key enzymes engaged in the phenylalanine pathway was downregulated after GA treatment. (4) In brief, our findings reveal the physiological and molecular mechanisms of exogenous GA treatment stimulation in .

摘要

(1) 植物激素赤霉素（GAs）在植物生长和发育中起着至关重要的作用，例如种子萌发、开花、结果和茎伸长。尽管已经深入研究了 GAs 的许多生物学作用，但 GAs 在木本植物中的分子机制仍不清楚。(2) 在这项研究中，我们研究了外源 GAs 处理对. 的影响。(3) 经过 7 天 GA 处理后， 株高和生物量增加，尤其是第二个节间。转录组分析表明，尽管参与 GA 信号通路的大多数基因上调，但与 CK 组相比，GA20 氧化酶（GA20ox）和 GA3 氧化酶（GA3ox）在 3 天 GA 处理组中的表达下调。GA 处理组中细胞伸长相关的基本螺旋-环-螺旋基因 和 的表达上调与 CK 组相比。参与激素信号的转录因子的转录表达水平发生变化，主要包括 bHLH、乙烯反应因子（ERF）和 WRKY 家族。此外，GA 处理后，参与苯丙氨酸途径的关键酶的转录表达水平下调。(4) 总之，我们的发现揭示了外源 GA 处理刺激 中生理和分子机制。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/956b/9569647/5a5b7ac9889d/ijms-23-11842-g010.jpg
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