NDLI: Hydrogen sulfide donor sodium hydrosulfide-induced accumulation of betaine is involved in the acquisition of heat tolerance in maize seedlings

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Brazilian Journal of Botany : Volume 37

Brazilian Journal of Botany : Volume 36

Hydrogen sulfide donor sodium hydrosulfide-induced accumulation of betaine is involved in the acquisition of heat tolerance in maize seedlings

Content Provider	Springer Nature Link
Author	Li, Z. G. Zhu, L. P.
Copyright Year	2014
Abstract	Hydrogen sulfide (H$_{2}$S) which is involved in plant growth, development, and the acquisition of stress tolerance including heat tolerance, is considered as the third signal molecule after nitric oxide and reactive oxygen species, while betaine is an important osmolyte with multiple physiological functions, but interaction between H$_{2}$S and betaine in the acquisition of heat tolerance in plants is not clear. In this study, pretreatment with H$_{2}$S donor sodium hydrosulfide (NaHS), as comparison to the control seedlings without NaHS treatment, significantly improved the activity of betaine aldehyde dehydrogenase (BADH), a key enzyme in the biosynthesis of betaine, which in turn induced the accumulation of endogenous betaine, eventually enhanced the survival percentage of maize seedlings under heat stress. In contrast, these effects induced by NaHS were eliminated by application of H$_{2}$S scavenger hypotaurine and inhibitor of BADH disulfiram, respectively, indicating that H$_{2}$S-improved heat tolerance of maize seedlings may be closely associated with the accumulation of endogenous betaine by activating the activity of BADH. In addition, exogenous betaine treatment enhanced the content of endogenous betaine, followed by improved the survival percentage of maize seedlings compared with the control without betaine treatment. All of the above-mentioned results showed that NaHS pretreatment could induce the accumulation of endogenous betaine by increasing BADH activity, and this accumulation may be involved in the acquisition of heat tolerance of maize seedlings, bridging a gap between H$_{2}$S and betaine in the acquisition of heat tolerance in plants.
Starting Page	31
Ending Page	38
Page Count	8
File Format	PDF
ISSN	01008404
Journal	Brazilian Journal of Botany
Volume Number	38
Issue Number	1
e-ISSN	18069959
Language	English
Publisher	Springer International Publishing
Publisher Date	2014-10-19
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogen sulfide Plant Systematics/Taxonomy/Biogeography Betaine Maize seedlings Heat tolerance Heat stress
Content Type	Text
Resource Type	Article
Subject	Plant Science

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