Oxidative metabolism, ROS and NO under oxygen deprivation

Blokhina, Olga; Fagerstedt, Kurt

doi:10.1016/j.plaphy.2010.01.007

Cited by 170 publications

(110 citation statements)

References 191 publications

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“…Notably, higher concentrations of NO (0.0005 vol-%) significantly impaired growth of the strains (Fig. 4E), indicating the need for a tight control of intracellular levels of the potentially cytotoxic radical NO (32,33).…”

Section: Resultsmentioning

confidence: 97%

“…The mechanisms of NO generation in the microalga are yet under research, but two possibilities have been proposed. Nitrite-dependent NO production, absent in a nitrate reductase mutant (34), suggests a nitrate reductase-dependent process like that in higher plants (32,35). NO synthesis in C. reinhardtii supplied with ammonium versus nitrate is sensitive to the Arg analog N ω -Nitro-L-arginine methyl ester (L-NAME) (28), an inhibitor of mammalian NO synthases.…”

Section: Resultsmentioning

confidence: 99%

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Hypoxic survival requires a 2-on-2 hemoglobin in a process involving nitric oxide

Hemschemeier

Düner

Casero

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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Hemoglobins are recognized today as a diverse family of proteins present in all kingdoms of life and performing multiple reactions beyond O 2 chemistry. The physiological roles of most hemoglobins remain elusive. Here, we show that a 2-on-2 ("truncated") hemoglobin, termed THB8, is required for hypoxic growth and the expression of anaerobic genes in Chlamydomonas reinhardtii. THB8 is 1 of 12 2-on-2 hemoglobins in this species. It belongs to a subclass within the 2-on-2 hemoglobin class I family whose members feature a remarkable variety of domain arrangements and lengths. Posttranscriptional silencing of the THB8 gene results in the misregulation of several genes and a growth defect under hypoxic conditions. The latter is intensified in the presence of an NO scavenger, which also impairs growth of wild-type cells. As recombinant THB8 furthermore reacts with NO, the results of this study indicate that THB8 is part of an NO-dependent signaling pathway.gene expression | hypoxia

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Hypoxic survival requires a 2-on-2 hemoglobin in a process involving nitric oxide

Hemschemeier

Düner

Casero

et al. 2013

Proc. Natl. Acad. Sci. U.S.A.

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“…Indirect low-oxygen sensing is thought to involve the perception of dynamics in levels of adenylates, carbohydrates, and pyruvate as well as localized cellular changes in pH, Ca 2+ , ROS, and nitric oxide (NO; Bailey-Serres and Chang, 2005;Rhoads and Subbaiah, 2007;Bailey-Serres and Voesenek 2008;Blokhina and Fagerstedt, 2010). The decline in adenylates or carbohydrates is likely to trigger SnRK1-regulated carbon management (Baena-González, 2010).…”

Section: Indirect Sensingmentioning

confidence: 99%

Waterproofing Crops: Effective Flooding Survival Strategies

2012

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“…In plants that have an efficient antioxidant system, toxic products generated in the cell are rapidly degraded by antioxidant enzymes [25]. In this work, the H 2 O 2 resulting from the reaction catalyzed by SOD was metabolized by CAT (Figure 2(b)) or APX (Figure 2(c)) in a co-regulated system.…”

Section: Resultsmentioning

confidence: 78%

Inductors of Resistance and Their Role in Photosynthesis and Antioxidant System Activity of Coffee Seedlings

Fernandes¹,

Silveira²,

Souza³

et al. 2014

AJPS

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We investigated the effects of formulations based on phosphite products on gas exchange and activity of antioxidant enzymes in coffee plants. Seedlings of the Mundo Novo cultivar were submitted to various treatments composed of different formulations of with potassium phosphite (ADB 120), manganese phosphite (Reforce Mn), and fungicide (PrioriXtra ® ). For coffee seedlings, the combination of potassium phosphite and citrus by-products, isolated or in a combination with other products elicited the antioxidant system. Besides the high activity of antioxidant enzymes, the photosynthetic rates were higher than other treatments. The better performance of coffee seedlings treated with those formulations occurred even in absence of pathogens.

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Oxidative metabolism, ROS and NO under oxygen deprivation

Cited by 170 publications

References 191 publications

Hypoxic survival requires a 2-on-2 hemoglobin in a process involving nitric oxide

Hypoxic survival requires a 2-on-2 hemoglobin in a process involving nitric oxide

Waterproofing Crops: Effective Flooding Survival Strategies

Inductors of Resistance and Their Role in Photosynthesis and Antioxidant System Activity of Coffee Seedlings

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