Plant responses to water stress: Role of reactive oxygen species

Kar, Rup Kumar

doi:10.4161/psb.6.11.17729

Cited by 156 publications

(107 citation statements)

References 60 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Increased ROS levels under stress conditions induces oxidation of cellular components thus becoming extremely deleterious which damages cellular membranes eventually leading to cell death (Mittler 2002;Dat et al 2000;Kar 2011). Studies on the molecular basis of plant responses to drought are critical in furthering our understanding of the regulatory mechanisms for tolerating environmental stresses which can be ultimately utilized to enhance stress tolerance through genetic manipulation (Xiong et al 2002;Umezawa et al 2006) or through molecular breeding.…”

Section: Introductionmentioning

confidence: 99%

Quantitative expression analysis of drought responsive genes in clones of Hevea with varying levels of drought tolerance

Luke

Sathik

Thomas

et al. 2015

Physiol Mol Biol Plants

View full text Add to dashboard Cite

In order to meet the ever rising global demand for natural rubber, cultivation of Hevea is being extended to nontraditional regions of India where extreme climatic conditions like drought and low temperature negatively influence the crop performance. In order to ensure maximum productivity, identification of drought tolerant clones of Hevea which can cope up with stress and give better crop yield is essential. Several attempts have been made previously to identify genes that are associated with drought tolerance in Hevea. In the present study, quantitative expression analysis was made using quantitative PCR for seven drought associated transcripts in four clones of Hevea with varying levels of drought tolerance. Among the seven genes studied, Mitogen Activated Protein (MAP) kinase, Myeloblastosis (Myb) transcription factor, C-repeat responsive element/Dehydration Responsive Element (CRT/DRE) binding factor and Nuclear Factor Y subunit A (NFYA) showed a positive association with drought tolerance. Transcripts of ascorbate peroxidase and heat shock protein 70 (HSP 70) did not show any correlation with drought tolerance. Interestingly, catalase gene was found down regulated in all the clones under drought condition. The possible role of these genes based on their level of gene expression in four different clones of Hevea with varying levels of drought tolerance is discussed.

show abstract

Section: Introductionmentioning

confidence: 99%

Quantitative expression analysis of drought responsive genes in clones of Hevea with varying levels of drought tolerance

Luke

Sathik

Thomas

et al. 2015

Physiol Mol Biol Plants

View full text Add to dashboard Cite

show abstract

“…Under normal growth conditions plants produce ROS, but they are kept in balance with the different antioxidants of the cell (redox homeostasis; Kar 2011). Under stressful conditions, ROS are produced at a high rate.…”

Section: Introductionmentioning

confidence: 99%

“…In response to drought stress plants are challenged by oxidative stress (Reddy et al 2004;de Carvalho 2008;Kar 2011;Noctor et al 2014). Oxidative stress is resulted from the generation of reactive oxygen species (ROS) such as superoxide (O 2 −), hydroxyl (OH−), hydrogen peroxide (H 2 O 2 ), and singlet oxygen ( 1 O 2 ; Gill & Tuteja 2010).…”

Section: Introductionmentioning

confidence: 99%

Gene expression and activity of antioxidant enzymes in barley (Hordeum vulgareL.) under controlled severe drought

Harb

Awad

Samarah

2015

Journal of Plant Interactions

View full text Add to dashboard Cite

The objective of the present study was to determine the activity of antioxidant enzymes: superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT) and the expression of their genes in two barley genotypes under controlled severe drought. To fulfill this objective, 21-day-old barley plants of two genotypes: Rum and Yarmouk were exposed to controlled severe drought (25% field capacity) for 2, 9, and 16 days. The activity of SOD was significantly high in Rum genotype after 2 days of drought treatment. In Yarmouk genotype, the activity of APX was significantly high after 2 and 9 days of drought treatment. In Rum genotype, CAT2 was upregulated after 9 days of drought treatment and SOD and APX were upregulated after 16 days of drought treatment, whereas CAT2, SOD, and APX were upregulated in Yarmouk genotype after 2 days of drought treatment. The results indicate a unique pattern of activity and gene expression of the antioxidant enzymes in the two barley genotypes under controlled severe drought. Moreover, the data suggest that each genotype utilizes different molecular and biochemical responses under the same drought conditions.

show abstract

“…However, depending on spatial and temporal ROS generation and scavenging, responses can be characterized as toward conferring protection by arousing the protection system or as directly leading to injuries or death. Gradual imposition of drought stress, which is more common in nature, probably triggers ROS generation in the apoplast by plasma membrane-localized NADPH oxidase, where Ca 2+ plays a role as an upstream as well as downstream messenger forming a positive feedback loop [19]. Effects of drought-induced generation of ROS in poplar and concomitant induction of ROS detoxifying enzymes in leaves have been investigated [20][21][22].…”

Section: Plant Life Science Research As a Basis For Forest Stress-basmentioning

confidence: 99%

“…Metabolic changes that occur in plants, particularly mesophytes, in response to water stress have been major targets of research interest while searching for molecular mechanism of stress tolerance. Such studies have been strengthened further with the aid of molecular tools like microarray and differential expression of genes [19].…”

Section: Plant Life Science Research As a Basis For Forest Stress-basmentioning

confidence: 99%

Molecular Technologies in Serbian Lowland Forestry under Climate Changes - Possibilities and Perspectives

Trudić¹,

Orlović²,

Galović³

et al. 2014

SEEFOR

View full text Add to dashboard Cite

Plant responses to water stress: Role of reactive oxygen species

Cited by 156 publications

References 60 publications

Quantitative expression analysis of drought responsive genes in clones of Hevea with varying levels of drought tolerance

Quantitative expression analysis of drought responsive genes in clones of Hevea with varying levels of drought tolerance

Gene expression and activity of antioxidant enzymes in barley (Hordeum vulgareL.) under controlled severe drought

Molecular Technologies in Serbian Lowland Forestry under Climate Changes - Possibilities and Perspectives

Contact Info

Product

Resources

About