Response of oxidative stress defense systems in rice (Oryza sativa) leaves with supplemental UV-B radiation

1997 ◽  
Vol 101 (2) ◽  
pp. 301-308 ◽  
Author(s):  
Qiujie Dai ◽  
Bin Yan ◽  
Shaobai Huang ◽  
Xiaozhong Liu ◽  
Shaobing Peng ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oryza Sativa ◽  
Defense Systems ◽  
Oxidative Stress Defense ◽  
Stress Defense

Response of oxidative stress defense systems in rice (Oryza sativa) leaves with supplemental UV-B radiation

1997 ◽  
Vol 101 (2) ◽  
pp. 301-308 ◽  
Author(s):  
Qiujie Dai ◽  
Bin Yan ◽  
Shaobai Huang ◽  
Xiaozhong Liu ◽  
Shaobing Peng ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oryza Sativa ◽  
Defense Systems ◽  
Oxidative Stress Defense ◽  
Stress Defense

scholarly journals RpoHII Activates Oxidative-Stress Defense Systems and Is Controlled by RpoE in the Singlet Oxygen-Dependent Response in Rhodobacter sphaeroides

2008 ◽  
Vol 191 (1) ◽  
pp. 220-230 ◽  
Author(s):  
Aaron M. Nuss ◽  
Jens Glaeser ◽  
Gabriele Klug
Keyword(s):  
Oxidative Stress ◽  
Singlet Oxygen ◽  
Rhodobacter Sphaeroides ◽  
Sigma Factor ◽  
Iron Homeostasis ◽  
Photooxidative Stress ◽  
Defense Systems ◽  
Oxidative Stress Defense ◽  
Stress Defense

ABSTRACT Photosynthetic organisms need defense systems against photooxidative stress caused by the generation of highly reactive singlet oxygen (1O2). Here we show that the alternative sigma factor RpoHII is required for the expression of important defense factors and that deletion of rpoHII leads to increased sensitivity against exposure to 1O2 and methylglyoxal in Rhodobacter sphaeroides. The gene encoding RpoHII is controlled by RpoE, and thereby a sigma factor cascade is constituted. We provide the first in vivo study that identifies genes controlled by an RpoHII-type sigma factor, which is widely distributed in the Alphaproteobacteria. RpoHII-dependent genes encode oxidative-stress defense systems, including proteins for the degradation of methylglyoxal, detoxification of peroxides, 1O2 scavenging, and redox and iron homeostasis. Our experiments indicate that glutathione (GSH)-dependent mechanisms are involved in the defense against photooxidative stress in photosynthetic bacteria. Therefore, we conclude that systems pivotal for the organism's defense against photooxidative stress are strongly dependent on GSH and are specifically recognized by RpoHII in R. sphaeroides.

scholarly journals Fur controls iron homeostasis and oxidative stress defense in the oligotrophic alpha-proteobacterium Caulobacter crescentus

2009 ◽  
Vol 37 (14) ◽  
pp. 4812-4825 ◽  
Author(s):  
José F. da Silva Neto ◽  
Vânia S. Braz ◽  
Valéria C. S. Italiani ◽  
Marilis V. Marques
Keyword(s):  
Oxidative Stress ◽  
Iron Homeostasis ◽  
Caulobacter Crescentus ◽  
Oxidative Stress Defense ◽  
And Oxidative Stress ◽  
Stress Defense

A proteomics view on the role of drought-induced senescence and oxidative stress defense in enhanced stem reserves remobilization in wheat

2011 ◽  
Vol 74 (10) ◽  
pp. 1959-1973 ◽  
Author(s):  
Mitra Mohammadi Bazargani ◽  
Elham Sarhadi ◽  
Ali-Akbar Shahnejat Bushehri ◽  
Andrea Matros ◽  
Hans-Peter Mock ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Oxidative Stress Defense ◽  
Stem Reserves ◽  
And Oxidative Stress ◽  
Stress Defense

scholarly journals Catalase Takes Part in Rat Liver Mitochondria Oxidative Stress Defense

2007 ◽  
Vol 282 (33) ◽  
pp. 24407-24415 ◽  
Author(s):  
Mauro Salvi ◽  
Valentina Battaglia ◽  
Anna Maria Brunati ◽  
Nicoletta La Rocca ◽  
Elena Tibaldi ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Rat Liver ◽  
Liver Mitochondria ◽  
Rat Liver Mitochondria ◽  
Oxidative Stress Defense ◽  
Stress Defense
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