文献类型：期刊文献

英文题名：Metabolic Pathways Involved in the Drought Stress Response of Nitraria tangutorum as Revealed by Transcriptome Analysis

作者：Liu, Chenggong[1,2] Duan, Na[3,4] Chen, Xiaona[3,4] Li, Huiqing[1,2] Zhao, Xiulian[1,2] Duo, Puzeng[3,4] Wang, Ji[5] Li, Qinghe[1,2]

第一作者：Liu, Chenggong

机构：[1] Research Institute of Forestry, Chinese Academy of Forestry, Beijing, 100091, China; [2] Key Laboratory of Tree Breeding and Cultivation, National Forestry and Grassland Administration, Beijing, 100091, China; [3] Experimental Center of Desert Forestry, Chinese Academy of Forestry, Bayan Nur, 015200, China; [4] Ulan Buh Desert Comprehensive Control National Permanent Scientific Research Base, National Forestry and Grassland Administration, Bayan Nur, 015200, China; [5] College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot, 010010, China

年份：2022

卷号：13

期号：4

外文期刊名：Forests

收录：EI(收录号：20221611963878);Scopus(收录号：2-s2.0-85127951233)

语种：英文

外文关键词：Amino acids - Gene expression - Metabolism - Plants (botany) - Chlorophyll

摘要：Drought resistance in plants is controlled by multiple genes. To identify the genes that mediate drought stress responses and to assess the associated metabolic pathways in the desert shrub Nitraria tangutorum, we conducted a transcriptome analysis of plants under control (maximum field capacity) and drought (20% of the maximum field capacity) conditions. We analyzed differentially expressed genes (DEGs) of N. tangutorum and their enrichment in the KEGG metabolic pathways database, and explored the molecular biological mechanisms underlying the answer to its drought tolerance. Between the control and drought groups, 119 classified metabolic pathways annotated 3047 DEGs in the KEGG database. For drought tolerance, nitrate reductase (NR) gene expression was downregulated, indicating that NR activity was decreased to improve drought tolerance. In ammonium assimilation, drought stress inhibited glutamine formation. Protochlorophyllide reductase (1.3.1.33) expression was upregulated to promote chlorophyll a synthesis, whereas divinyl reductase (1.3.1.75) expression was downregulated to inhibit chlorophyll-ester a synthesis. The expression of the chlorophyll synthase (2.5.1.62) gene was downregulated, which affected the synthesis of chlorophyll a and b. Overall, drought stress appeared to improve the ability to convert chlorophyll b into chlorophyll a. Our data serve as a theoretical foundation for further elucidating the growth regulatory mechanism of desert xerophytes, thereby facilitating the development and cultivation of new, drought-resistant genotypes for the purpose of improving desert ecosystems. ? 2022 by the authors. Licensee MDPI, Basel, Switzerland.