Hydrogen sulfide acts as a downstream signal molecule in salicylic acid-induced heat tolerance in maize (Zea mays L.) seedlings

Journal of Plant Physiology
Zhong-Guang LiXiao-Juan Li

Abstract

Salicylic acid (SA), 2-hydroxy benzoic acid, is a small phenolic compound with multifunction that is involved in plant growth, development, and the acquisition of stress tolerance. In recent years, hydrogen sulfide (H2S) has been found to have similar functions, but cross talk between SA and H2S in the acquisition of heat tolerance is not clear. In this study, pretreatment of maize seedlings with SA improved the survival percentage of seedlings under heat stress, indicating that SA pretreatment could improve the heat tolerance of maize seedlings. In addition, treatment with SA enhanced the activity of L-cysteine desulfhydrase (L-DES), a key enzyme in H2S biosynthesis, which in turn induced accumulation of endogenous H2S. Interestingly, SA-induced heat tolerance was enhanced by addition of NaHS, a H2S donor, but weakened by specific inhibitors of H2S biosynthesis DL-propargylglycine (PAG) and its scavenger hydroxylamine (HT). Furthermore, pretreatment with paclobutrazol (PAC) and 2-aminoindan-2-phosphonic acid (AIP), inhibitors of SA biosynthesis, had no significant effect on NaHS-induced heat tolerance of maize seedlings. Similarly, significant change in the activities of phenylalanine ammonia lyase (PAL) and benzoic-acid-2-hyd...Continue Reading

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Citations

Jan 21, 2016·Plant Signaling & Behavior·Lan MaXiangyang Hu
Apr 2, 2016·Plant Physiology and Biochemistry : PPB·Xiaodong ChenXiangyang Hu
Jan 10, 2020·Physiologia Plantarum·Akhilesh K Pandey, Arti Gautam
Jul 2, 2020·International Journal of Molecular Sciences·Lijuan XuanChongying Wang
Oct 21, 2018·BMC Plant Biology·Baohua FengGuanfu Fu
Jul 19, 2020·Antioxidants·Angeles ArocaLuis C Romero
Oct 16, 2020·Journal of Integrative Plant Biology·Jing ZhangYanjie Xie
Jun 13, 2021·Protoplasma·Zhong-Guang Li, Xin-Yu Ye
Oct 26, 2021·Journal of Agricultural and Food Chemistry·Eric M BrownNed B Bowden

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