Deposition pattern of hydrogen peroxide in the leaf sheaths of rice under salt stress

Abstract

Deposition pattern of hydrogen peroxide (H 2 O 2 ) under salt stress (100 mM NaCl) was examined cytochemically in rice (Oryza sativa L. cv. Pokkali) through the reaction of H 2 O 2 with cerium chloride (CeCl 3 ) to produce electron dense precipitates of cerium perhydroxide. The distribution pattern of cerium perhydroxide precipitates in leaf sheath was considerably different from other parts of rice under salinity stress. Cerium perhydroxide precipitates were mainly accumulated on the tonoplast of leaf sheath under salinity, although they were localized on the cell wall and plasma membrane in all other tissues such as leaf blade and root.

Microbial amelioration of salinity stress in HD 2967 wheat cultivar by up-regulating antioxidant defense

“…Plants subjected to 200 mM NaCl accrued more MDA content and membrane damage. This observation supports previous findings which showed that salinity stress induces enhanced production of MDA [56], thereby affecting the integrity of membrane [57].…”

“…Plants subjected to 200 mM NaCl accrued more MDA content and membrane damage. This observation supports previous findings which showed that salinity stress induces enhanced production of MDA [ 56 ], thereby affecting the integrity of membrane [ 57 ]. However, microbial inoculation showed lower MDA content and relative permeability of membrane ( Figure 3 c) than uninoculated plants at all levels of salinity, which indicates that PGPB and P. indica inoculation reduces oxidative damage and maintains the integrity of cellular membrane.…”

Biochemical, physiological and molecular evaluation of rice cultivars differing in salt tolerance at the seedling stage

“…On the other hand, removal of the free oxygen radicals is an important mechanism of salt tolerance in the plants (Motohashi et al 2010). In this study, the salinity stress affected the activity of antioxidant system which is in line with Wi et al (2006). They reported that the activity of antioxidant enzymes in the rice tolerant varieties was more than the susceptible ones under salt stress conditions.…”

Identification of hydrogen peroxide responsive ESTs involved in phenylethanoid glycoside biosynthesis in Cistanche salsa cell culture

“…Like ROS, it can induce the ROS scavenging system composed of superoxide dismutase, catalase, peroxidases, etc., and it serves as the downstream signal of salt, osmotic, and dehydration stresses (Wi et al 2006, Kar 2011, Furlan et al 2013, Sathiyaraj et al 2014. It was suggested that H 2 O 2 generation in plants is accompanied with induced Fig.…”