Synergistic effects of carbon cycle metabolism and photosynthesis in Chinese cabbage under salt stress

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外文摘要：Chinese cabbage(Brassica rapa ssp.pekinensis)has a long cultivation history and is one of the vegetable crops with the largest cultivation area in China.However,salt stress severely damages photosynthesis and hormone metabolism,nutritional balances,and results in ion toxicity in plants.To better understand the mechanisms of salt-induced growth inhibition in Chinese cabbage,RNA-seq and physiological index deter-mination were conducted to explore the impacts of salt stress on carbon cycle metabolism and photosynthesis in Chinese cabbage.Here,we found that the number of thylakoids and grana lamellae and the content of starch granules and chlorophyll in the leaves of Chinese cabbage under salt stress showed a time-dependent response,first increasing and then decreasing.Chinese cabbage increased the transcript levels of genes related to the photosynthetic apparatus and carbon metabolism under salt stress,probably in an attempt to alleviate damage to the photosynthetic system and enhance CO2 fixation and energy metabolism.The transcription of genes related to starch and sucrose synthesis and degradation were also enhanced;this might have been an attempt to maintain intracellular osmotic pressure by increasing soluble sugar concentrations.Soluble sugars could also be used as potential reactive oxygen species(ROS)scavengers,in concert with peroxidase(POD)enzymes,to eliminate ROS that accumulate during metabolic processes.Our study characterizes the synergistic response network of carbon metabolism and photosynthesis under salt stress.

外文关键词：

Chinese cabbageSalt stressCarbon metabolismPhotosynthesisChloroplast

作者：

Hao Liang、Qiling Shi、Xing Li、Peipei Gao、Daling Feng、Xiaomeng Zhang、Yin Lu、Jingsen Yan、Shuxing Shen、Jianjun Zhao、Wei Ma

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作者单位：

State Key Laboratory of North China Crop Improvement and Regulation,Key Laboratory of Vegetable Germplasm Innovation and Utilization of Hebei,Collaborative Innovation Center of Vegetable Industry in Hebei,College of Horticulture,Hebei Agricultural University,Baoding,Hebei 071000,China

基金：

Natural Science Foundation of Hebei Province-Innovation Group Research Project国家自然科学基金Science Fund for Distinguished Young Scholars of Hebei ProvinceHebei Province Outstanding Youth FundHebei Provincial Key Research ProjectsHebei International Joint Research Base of Modern Agricultural Biotechnology

项目编号：

C202020411131930098C2021204049BJ202102421326344D

出版年：

2024

DOI：

10.1016/j.hpj.2022.09.003

园艺学报(英文版)

CSTPCD

ISSN：

年,卷(期)：2024.10(2)

参考文献量60