文献类型： 外文期刊

作者： Xie, Na ¹ ; Li, Bo ¹ ; Yu, Jing ⁵ ; Shi, Ruxia ¹ ; Zeng, Qin ¹ ; Jiang, Yunli ⁶ ; Zhao, Dan ¹ ;

作者机构： 1.Guizhou Univ, Minist Educ, Inst Agrobioengn, Guiyang 550025, Guizhou, Peoples R China

2.Guizhou Univ, Coll Life Sci, Inst Agrobioengn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China

3.Guizhou Univ, Coll Life Sci, Key Lab Plant Resources Conservat & Germplasm Inn, Minist Educ, Guiyang 550025, Guizhou, Peoples R China

4.Guizhou Acad Agr Sci, Guizhou Plant Conservat Technol Ctr, Guiyang 550006, Guizhou, Peoples R China

5.Guizhou Acad Tobacco Sci, Tobacco Mol Genet Key Lab China Tobacco, Guiyang 550081, Peoples R China

6.Guizhou Acad Forestry, Guiyang 550005, Guizhou, Peoples R China

关键词： Phoebe zhennan; Drought; Antioxidant enzyme; Hormone; Transcriptomic; Proteomic

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background Phoebe zhennan S.Lee (nanmu) is listed as a threatened tree species in China, whose growth and development, especially during the seedling stage, can be severely limited by drought. Previous studies on nanmu responses to drought stress involved physiological and biochemical analyses, while the molecular mechanisms remained unclear. Therefore, it is of great significance to carry out molecular biology research on the drought resistance of nanmu and reveal the genetic background and molecular regulation mechanism of nanmu drought resistance. Results Drought stress enhanced the soluble sugar (SS), free proline(PRO), superoxide anion (O2 center dot-), and hydrogen peroxide (H2O2) contents as well as the peroxidase (POD) and monodehydroascorbate reductase (MDHAR) activities of nanmu. However, glutathione S-transferase (GST) activity was sensitive to drought stress. Further transcriptomic and proteomic analyses revealed the abundant members of the differentially expressed genes(DEGs) and differentially expressed proteins(DEPs) that were related to phenylpropanoid and flavonoid biosynthesis, hormone biosynthesis and signal transduction, chlorophyll metabolism, photosynthesis, and oxidation-reduction reaction, which suggested their involvement in the drought response of nanmu. These enhanced the osmotic regulation, detoxification, and enzyme-induced and non-enzyme-induced antioxidant ability of nanmu. Moreover, 52% (447/867) of proteins that were up-regulated and 34% (307/892) down-regulated ones were attributed to the increase and decrease of transcription abundance. Transcript up (T-U) and protein up (P-U) groups had 447 overlaps, while transcript down (T-D) and protein down (P-D) groups had 307 overlaps, accounting for 54% of up and 35% of down-regulated proteins. The lack of overlap between DEGs and DEPs also suggested that post-transcriptional regulation has a critical role in nanmu response to drought. Conclusions Our research results provide significant insights into the regulatory mechanisms of drought stress in nanmu.