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- Title
Hydrogen sulfide enhances nitric oxide-induced tolerance of hypoxia in maize ( Zea mays L.).
- Authors
Peng, Renyi; Bian, Zhiyuan; Zhou, Lina; Hai, Na; Yang, Changquan; Yang, Tao; Wang, Xinyu; Wang, Chongying; Cheng, Wei
- Abstract
Key message: Our data present H S in a new role, serving as a multi-faceted transducer to different response mechanisms during NO-induced acquisition of tolerance to flooding-induced hypoxia in maize seedling roots. Abstract: Nitric oxide (NO), serving as a secondary messenger, modulates physiological processes in plants. Recently, hydrogen sulfide (HS) has been demonstrated to have similar signaling functions. This study focused on the effects of treatment with HS on NO-induced hypoxia tolerance in maize seedlings. The results showed that treatment with the NO donor sodium nitroprusside (SNP) enhanced survival rate of submerged maize roots through induced accumulation of endogenous HS. The induced HS then enhanced endogenous Ca levels as well as the Ca-dependent activity of alcohol dehydrogenase (ADH), improving the capacity for antioxidant defense and, ultimately, the hypoxia tolerance in maize seedlings. In addition, NO induced the activities of key enzymes in HS biosynthesis, such as l-cysteine desulfhydrases ( l-CDs), O-acetyl- l-serine (thiol)lyase (OAS-TL), and β-Cyanoalanine Synthase (CAS). SNP-induced hypoxia tolerance was enhanced by the application of NaHS, but was eliminated by the HS-synthesis inhibitor hydroxylamine (HA) and the HS-scavenger hypotaurine (HT). HS concurrently enhanced the transcriptional levels of relative hypoxia-induced genes. Together, our findings indicated that HS serves as a multi-faceted transducer that enhances the nitric oxide-induced hypoxia tolerance in maize ( Zea mays L.)
- Subjects
HYDROGEN sulfide; NITRIC oxide; CORN -- Biotechnology; EFFECT of floods on plants; CYTOPLASMIC filaments
- Publication
Plant Cell Reports, 2016, Vol 35, Issue 11, p2325
- ISSN
0721-7714
- Publication type
Article
- DOI
10.1007/s00299-016-2037-4