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Response of reactive oxygen species production and antioxidant metabolism to putrescine under water stress in wheat leaves

KrishiKosh

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Title Response of reactive oxygen species production and antioxidant metabolism to putrescine under water stress in wheat leaves
 
Creator Bhankar, Vinita
 
Contributor Sawhney, Veena
 
Subject Water stress, Plant water status, Antioxidant defense mechanisms, ROS, Lipid peroxidation, Putrescine
 
Description The reduction in RWC and osmotic potential by water deficit stress in the
seedlings of WH147 and UP2338 cultivars of wheat was partially enhanced by
putrescine applicaton. The superoxide radicals and H2O2 production was high in
water deficit plants, also it resulted in the increased lipid peroxidation, but they
were decreased on addition of putrescine to the stressed plants, indicating the
repair of cellular membranes. Water deficit stress enhanced the activities of H2O2
scavenging enzymes viz. catalase, ascorbate peroxidase and enzymes of
ascorbate-glutathione cycle but activity of superoxide dismutase, a H2O2
producing enzyme, was decreased under stress. Exogenously applied putrescine
further elevated the activities of these enzymes along with that of superoxide
dismutase in both the cultivars. The level of total and reduced glutatione which
was decreased due to water stress was recovered by putrescine application. Redox
state of glutathione and ascorbate, disturbed in the stressed plants, was found to
recover in putrescine treated stressed plants.
 
Date 2016-11-28T11:29:02Z
2016-11-28T11:29:02Z
2006
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/87799
 
Language en
 
Format application/pdf
 
Publisher CCSHAU