Hydrogen sulfide may function downstream of hydrogen peroxide in salt stress-induced stomatal closure in Vicia faba

被引:0
|
作者
Ma, Yinli [1 ]
Zhang, Wei [1 ]
Niu, Jiao [1 ]
Ren, Yu [1 ]
Zhang, Fan [1 ]
机构
[1] Shanxi Normal Univ, Sch Life Sci, Linfen 041004, Peoples R China
关键词
broad bean; desulfhydrase; D-L-cysteine; gasotransmitter; hydrogen sulphide; physiological and biochemical mechanisms; salt stress; NITRIC-OXIDE; ABSCISIC-ACID; SEED-GERMINATION; L-CYSTEINE; INVOLVEMENT; SALINITY; OXYGEN; TOLERANCE; CALCIUM; INTERRELATIONSHIP;
D O I
10.1071/FP18096
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
The roles of hydrogen sulfide (H2S) and hydrogen peroxide (H2O2) in signalling transduction of stomatal closure induced by salt stress were examined by using pharmacological, spectrophotographic and laser scanning confocal microscopic (LSCM) approaches in Vicia faba L. Salt stress resulted in stomatal closure, and this effect was blocked by H2S modulators hypotaurine (HT), aminooxy acetic acid (AOA), hydroxylamine (NH2OH), potassium pyruvate (C3H3KO3) and ammonia (NH3) and H2O2 modulators ascorbic acid (ASA), catalase (CAT), diphenylene iodonium (DPI). Additionally, salt stress induced H2S generation and increased L-/D-cysteine desulfhydrase (L-/D-CDes, pyridoxalphosphate-dependent enzyme) activity in leaves, and caused H2O2 production in guard cells, and these effects were significantly suppressed by H2S modulators and H2O2 modulators respectively. Moreover, H2O2 modulators suppressed salt stress-induced increase of H2S levels and L-/D-CDes activity in leaves as well as stomatal closure of V. faba. However, H2S modulators had no effects on salt stress-induced H2O2 production in guard cells. Altogether, our data suggested that H2S and H2O2 probably are involved in salt stress-induced stomatal closure, and H2S may function downstream of H2O2 in salt stress-induced stomatal movement in V. faba.
引用
收藏
页码:136 / 145
页数:10
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