Plant ascorbate peroxidases (APXs), enzymes catalyzing the dismutation of H2O2 into H2O and O2, play an important role in reactive oxygen species homeostasis in plants. The rice genome has eight OsAPXs, but their physiological functions remain to be determined. In this report, we studied the function of OsAPX2 gene using a T-DNA knockout mutant under the treatment of drought, salt and cold stre...

This is the first report on soybean with the aim to show the effects of gamma radiation on trichome metabolim. Soybean seeds were subjected to 300 Gy gamma radiation at a dose rate of 10 Gy/min using a Cs-137 gamma source. The photosynthetic pigment, total protein content and ascorbate peroxidase activity were studied. The results showed that the chlorophyll a content was decreased by 80% on da...

First, the enzyme reacts with one peroxide equivalent resulting in oxidation of the haem iron to the oxyferryl, Fe(IV-0), centre and an organic radical, R', where R' is either the porphyrin or an amino acid-centred radical. Next, Compound I oxidizes one substrate molecule to give a substrate radical and Compound 11. Finally, Compound I1 is reduced by a second substrate molecule to the resting, ...

Iron deficiency is one of the most important factors affecting growth and yield. Utilizing tissue culture technique to study the response of plant to Fe-stress was suggested as a rapid and simple method. Fe-deficiency was explored by cultivating shoots of Borage plantlets on MS media with 27.8, 13.0, 0.0 mg/L FeSO4. Results showed that, severe Fe-deficiency induced yellowing and typical iron de...

In this work the influence of the nodulation of pea (Pisum sativum L.) plants on the oxidative metabolism of different leaf organelles from young and senescent plants was studied. Chloroplasts, mitochondria, and peroxisomes were purified from leaves of nitrate-fed and Rhizobium leguminosarum-nodulated pea plants at two developmental stages (young and senescent plants). In these cell organelles,...

The dyes used in the production of textile industry are toxic substances that resistant to biological treatment. Most them have highly complex polymer structures. Salicylic acid (SA) is an important hormone produced by plants provides tolerance many biotic and abiotic stress factors. Duckweed (L. minor L.) free floating plants. These been laboratory toxicological studies researchers for reasons...

A large number of studies have shown the existence of cross-tolerance in plants, but the exact physiological and biochemical mechanism(s) is poorly understood. In this study, heat-shock (42 °C, 5 h) induced salinity and drought tolerance and possible involvement of antioxidative and glyoxalase systems were investigated in mustard (Brassica campestris L.) seedlings. Seven-day-old seedlings were ...

The present investigations were undertaken to ascertain the extent of lipid peroxidation, oxidative stress and antioxidative system during ripening of two varieties of ber fruits (Ziziphus mauritiana Lam.) differing in their shelf lives, viz. Umran (8–9 days) and Kaithali (4–5 days). Based on visual observations, fruits were categorized as immature green (IG), mature green (MG), turning colour ...

Drought stress is considered as a main restriction to have the best potential crops performance in arid and semi-arid regions world. Hence, some mechanistic strategies are required manage drought detrimental influences. Silicon an essential mineral nutrient, plays important role physiology, metabolism, function of exposed stress. This study was carried out evaluate influences various irrigation...