Physiological and proteomic analyses reveal the important role of arbuscular mycorrhizal fungi on enhancing photosynthesis in wheat under cadmium stress

被引：8

作者：

Li, Hua ^{[1
]}

Zhang, Lele ^{[1
]}

Wu, Baocun ^{[2
,3
]}

Li, Yang ^{[1
]}

Wang, Huijuan ^{[1
]}

Teng, Huixin ^{[1
]}

Wei, Dongwei ^{[1
]}

Yuan, Zhiliang ^{[1
]}

Yuan, Zuli ^{[1
]}

机构：

[1] Henan Agr Univ, Coll Life Sci, Zhengzhou, Peoples R China

[2] Henan Prov Rock & Mineral Testing Ctr, Zhengzhou, Peoples R China

[3] Minist Nat Resources, Lab Precious Met Anal & Explorat Technol, Zhengzhou, Peoples R China

来源：

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2023年 / 261卷

基金：

中国国家自然科学基金;

关键词：

Arbuscular mycorrhizal fungi; Cadmium stress; Photosynthesis; Proteome; S-ADENOSYLMETHIONINE; HEAVY-METALS; PLANTS; TOLERANCE; MECHANISMS; TOXICITY; PROTEINS; GROWTH; GENE; CU;

D O I：

10.1016/j.ecoenv.2023.115105

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Arbuscular mycorrhizal fungi (AMF) are important in the phytoremediation of cadmium (Cd). Improving photosynthesis under Cd stress helps to increase crop yields. However, the molecular regulatory mechanisms of AMF on photosynthetic processes in wheat (Triticum aestivum) under Cd stress remain unclear. This study utilized physiological and proteomic analyses to reveal the key processes and related genes of AMF that regulate photosynthesis under Cd stress. The results showed that AMF promoted the accumulation of Cd in the roots of wheat but significantly reduced the content of Cd in the shoots and grains. The photosynthetic rates, stomatal conductance, transpiration rates, chlorophyll content, and accumulation of carbohydrates under Cd stress were increased by AMF symbiosis. Proteomic analysis showed that AMF significantly induced the expression of two enzymes involved in the chlorophyll biosynthetic pathway (coproporphyrinogen oxidase and Mg-protoporphyrin IX chelatase), improved the expression of two proteins related to CO2 assimilation (ribulose-1,5-bisphosphate carboxylase and malic enzyme), and increased the expression of S-adenosylmethionine synthase, which posi-tively regulates abiotic stress. Therefore, AMF may regulate photosynthesis under Cd stress by promoting chlorophyll biosynthesis, carbon assimilation, and S-adenosylmethionine metabolism.

引用

页数：12