NDLI: Involvement of hydrogen peroxide and heme oxygenase-1 in hydrogen gas-induced osmotic stress tolerance in alfalfa

Content Provider	Springer Nature Link
Author	Jin, Qijiang Cui, Weiti Dai, Chen Zhu, Kaikai Zhang, Jing Wang, Ren La, Honggui Li, Xin Shen, Wenbiao
Copyright Year	2016
Abstract	Hydrogen gas (H2) was recently suggested to perform multiple roles during plant response to abiotic stresses. However, physiological mechanisms and downstream targets remain elusive. Here, we showed that osmotic stress triggered by polyethylene glycol (PEG) could enhance hydrogenase-like activity and H2 production in alfalfa seedlings. After the administration of H2, the enhanced tolerance to PEG stress was confirmed, as evidence by the observation of the alleviation of root inhibition and the decrease in lipid peroxidation. H2 also rapidly elevated hydrogen peroxide (H2O2) levels, peaking at 5 h. When supplemented with exogenous H2O2, a heme oxygenase-1 (HO-1; a novel antioxidant enzyme) inducer hemin, and one of HO-1 catalytic products, carbon monoxide (CO), antioxidant enzymes and subsequent PEG tolerance were induced. The inhibition of NADPH oxidase and chemical scavenging of H2O2 could block H2-induced HO-1 expression and PEG tolerance. Simultaneously, a HO-1 inhibitor counteracted the effects of H2 except H2-induced H2O2 production. In summary, these results suggested that H2O2 might play a significant role in HO-1-dependent induction of plant osmotic stress tolerance triggered by H2.
Starting Page	215
Ending Page	223
Page Count	9
File Format	PDF
ISSN	01676903
Journal	Plant Growth Regulation
Volume Number	80
Issue Number	2
e-ISSN	15735087
Language	English
Publisher	Springer Netherlands
Publisher Date	2016-02-23
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Hydrogen gas Osmotic stress Alfalfa Heme oxygenase-1 Hydrogen peroxide Plant Sciences Plant Anatomy/Development Plant Physiology Agriculture
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Agronomy and Crop Science

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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