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基于 PEG 诱导干旱胁迫下燕麦中 ROS 稳态调控的 MYB 转录因子家族和 AsMYB1R 亚家族的全基因组分析。

Genome-wide analysis of MYB transcription factor family and AsMYB1R subfamily contribution to ROS homeostasis regulation in Avena sativa under PEG-induced drought stress.

机构信息

Information Technology Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100083, China.

Intelligent Equipment Research Center, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 100083, China.

出版信息

BMC Plant Biol. 2024 Jul 6;24(1):632. doi: 10.1186/s12870-024-05251-w.

DOI:10.1186/s12870-024-05251-w
PMID:38970019
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11227197/
Abstract

BACKGROUND

The myeloblastosis (MYB) transcription factor (TF) family is one of the largest and most important TF families in plants, playing an important role in a life cycle and abiotic stress.

RESULTS

In this study, 268 Avena sativa MYB (AsMYB) TFs from Avena sativa were identified and named according to their order of location on the chromosomes, respectively. Phylogenetic analysis of the AsMYB and Arabidopsis MYB proteins were performed to determine their homology, the AsMYB1R proteins were classified into 5 subgroups, and the AsMYB2R proteins were classified into 34 subgroups. The conserved domains and gene structure were highly conserved among the subgroups. Eight differentially expressed AsMYB genes were screened in the transcriptome of transcriptional data and validated through RT-qPCR. Three genes in AsMYB2R subgroup, which are related to the shortened growth period, stomatal closure, and nutrient and water transport by PEG-induced drought stress, were investigated in more details. The AsMYB1R subgroup genes LHY and REV 1, together with GST, regulate ROS homeostasis to ensure ROS signal transduction and scavenge excess ROS to avoid oxidative damage.

CONCLUSION

The results of this study confirmed that the AsMYB TFs family is involved in the homeostatic regulation of ROS under drought stress. This lays the foundation for further investigating the involvement of the AsMYB TFs family in regulating A. sativa drought response mechanisms.

摘要

背景

髓细胞白血病（MYB）转录因子（TF）家族是植物中最大和最重要的 TF 家族之一，在生命周期和非生物胁迫中发挥重要作用。

结果

本研究根据在染色体上的位置顺序，从燕麦中鉴定并命名了 268 个 Avena sativa MYB（AsMYB）TFs。对 AsMYB 和拟南芥 MYB 蛋白进行系统发育分析，以确定它们的同源性，AsMYB1R 蛋白被分为 5 个亚组，AsMYB2R 蛋白被分为 34 个亚组。亚组之间的保守结构域和基因结构高度保守。从转录组的转录数据中筛选出 8 个差异表达的 AsMYB 基因，并通过 RT-qPCR 进行验证。在 PEG 诱导的干旱胁迫下，研究了与缩短生长周期、气孔关闭以及营养和水分运输相关的 3 个 AsMYB2R 亚组基因。对与 LHY 和 REV 1 一起调节 ROS 稳态的 AsMYB1R 亚组基因 GST 进行了更详细的研究，以确保 ROS 信号转导并清除多余的 ROS 以避免氧化损伤。

结论

本研究结果证实，AsMYB TFs 家族参与干旱胁迫下 ROS 的动态平衡调节。这为进一步研究 AsMYB TFs 家族在调节燕麦对干旱响应机制中的作用奠定了基础。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/7e3caa4b1913/12870_2024_5251_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/020a0f6f72e1/12870_2024_5251_Fig1_HTML.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/7e3caa4b1913/12870_2024_5251_Fig11_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/020a0f6f72e1/12870_2024_5251_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/35c934d61287/12870_2024_5251_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/2231c90d9d6c/12870_2024_5251_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/7004f8162aeb/12870_2024_5251_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/436dd1173afa/12870_2024_5251_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/9bef6b793f59/12870_2024_5251_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/1f6e502cb5d7/12870_2024_5251_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/7e24da112516/12870_2024_5251_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/d8409745b86b/12870_2024_5251_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/ce56ebc23533/12870_2024_5251_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/ed2f/11227197/7e3caa4b1913/12870_2024_5251_Fig11_HTML.jpg

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