The Ca2+ signaling, Glu, and GABA responds to Cd stress in duckweed

被引：34

作者：

Yang, Lin ^{[1
]}

Yao, Jie ^{[1
]}

Sun, Jinge ^{[1
]}

Shi, Liqian ^{[1
]}

Chen, Yikai ^{[1
]}

Sun, Jinsheng ^{[1
]}

机构：

[1] Tianjin Normal Univ, Coll Life Sci, Tianjin Key Lab Anim & Plant Resistance, Tianjin 300387, Peoples R China

来源：

AQUATIC TOXICOLOGY | 2020年 / 218卷

基金：

美国国家科学基金会;

关键词：

Cadmium; Calcium; Glutamate; GABA; Duckweed; LONG-DISTANCE; CADMIUM; CALCIUM; GENE; METABOLISM; TOXICITY; SALT; OVEREXPRESSION; TOLERANCE; LEMNACEAE;

D O I：

10.1016/j.aquatox.2019.105352

中图分类号：

Q17 [水生生物学];

学科分类号：

071004 ;

摘要：

Cadmium (Cd) affects plants and animal health seriously. Ca2+ signals in plant cells are important for adaptive responses to environmental stresses. Here we showed that 50 mu M Cd shock stimulated the Ca2+ signal via modifying the instantaneous Ca2+ flux from influx of 17 pmol.cm(-2).s(-1) to the efflux of 240 pmol.cm(-2).s(-1) at 100 mu m from rhizoid tip. And the Ca2+ signal transferred to the vein and mesophyll cell. The Ca addition decreased the accumulation of Cd. The gene expression of glutamate receptor-like (GLR) proteins, which is activated by Glu and triggers Ca2+ flux, was increased significantly by 24 h Cd stress. Glu content was increased under Cd stress and exogenous Glu triggered the Ca2+ signal in duckweed, while Ca2+ addition caused no influence to Glu content. GABA, which is synthesized from Glu and acts as an inhibitory neurotransmitter, has been decreased with 24 h Cd treatment. GABA addition increased the abscission rate and Glu addition decreased the abscission rate during Cd stress, suggesting that the Glu/GABA ratio is important for responding to Cd. This research shows the sight of the Glu, Ca2+, GABA signaling networks during Cd stress.

引用

页数：11

共 52 条

[11] ALLEVIATION OF CADMIUM TOXICITY ON MAIZE SEEDLINGS BY CALCIUM [J].