NDLI: Gene expression and activity of antioxidant enzymes in rice plants, cv. BRS AG, under saline stress

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Gene expression and activity of antioxidant enzymes in rice plants, cv. BRS AG, under saline stress

Content Provider	Springer Nature Link
Author	Rossatto, Tatiana Amaral, Marcelo Nogueira Benitez, Letícia Carvalho Vighi, Isabel Lopes Braga, Eugenia Jacira Bolacel Magalhães Júnior, AriaMartins Maia, Mara Andrade Colares Silva Pinto, Luciano
Copyright Year	2017
Abstract	The rice cultivar (Oryza sativa L.) BRS AG, developed by Embrapa Clima Temperado, is the first cultivar designed for purposes other than human consumption. It may be used in ethanol production and animal feed. Different abiotic stresses negatively affect plant growth. Soil salinity is responsible for a serious reduction in productivity. Therefore, the objective of this study was to evaluate the gene expression and the activity of antioxidant enzymes (SOD, CAT, APX and GR) and identify their functions in controlling ROS levels in rice plants, cultivar BRS AG, after a saline stress period. The plants were grown in vitro with two NaCl concentrations (0 and 136 mM), collected at 10, 15 and 20 days of cultivation. The results indicated that the activity of the enzymes evaluated promotes protection against oxidative stress. Although, there was an increase of reactive oxygen species, there was no increase in MDA levels. Regarding genes encoding isoforms of antioxidant enzymes, it was observed that OsSOD3-CU/Zn, OsSOD2-Cu/Zn, OsSOD-Cu/Zn, OsSOD4-Cu/Zn, OsSODCc1-Cu/Zn, OsSOD-Fe, OsAPX1, OsCATB and OsGR2 were the most responsive. The increase in the transcription of all genes among evaluated isoforms, except for OsAPX6, which remained stable, contributed to the increase or the maintenance of enzyme activity. Thus, it is possible to infer that the cv. BRS AG has defense mechanisms against salt stress.
Starting Page	865
Ending Page	875
Page Count	11
File Format	PDF
ISSN	09715894
Journal	Physiology and Molecular Biology of Plants
Volume Number	23
Issue Number	4
e-ISSN	09740430
Language	English
Publisher	Springer India
Publisher Date	2017-10-17
Publisher Place	New Delhi
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Oryza sativa L. Oxidative stress Reactive oxygen species Salinity Plant Sciences Plant Physiology Biological and Medical Physics, Biophysics Cell Biology
Content Type	Text
Resource Type	Article
Subject	Physiology Plant Science Molecular Biology

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Gene expression and activity of antioxidant enzymes in rice plants, cv. BRS AG, under saline stress.

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Gene expression and activity of antioxidant enzymes in rice plants, cv. BRS AG, under saline stress

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