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Betalains And Expression Of Antioxidant Enzymes During Development Andabiotic Stress In Rivina Humilis L. Berries, Mohammad Imtiyaj Khan, Avinash Kumar, Parvatam Giridhar
Betalains And Expression Of Antioxidant Enzymes During Development Andabiotic Stress In Rivina Humilis L. Berries, Mohammad Imtiyaj Khan, Avinash Kumar, Parvatam Giridhar
Turkish Journal of Botany
This work investigated the betalains profile and associated molecular changes during Rivina humilis L. Berry development and 1 month after inducing stress through elicitors such as salicylic acid (SA, 0.05-0.5 mM) and chitosan (CH, 0.1%-1.0%). The results showed that, during berry development, diphenol oxidase activity of tyrosinase increased, which was reflected in an exponential increase in betalains accumulation. Expression levels of a putative Rivina humilis betanidin-5-O-glucosyltransferase 2 (RhBGT2) remained unchanged, while that of antioxidant enzymes superoxide dismutase (SOD) and catalase (CAT) decreased. Treatment with SA (0.1 mM) and CH (0.5%) enhanced betalains accumulation. The pattern of betalains accumulation during berry …
Relationships Between Some Endogenous Signal Compounds And The Antioxidantsystem In Response To Chilling Stress In Maize (Zea Mays L.) Seedlings, Nevzat Esi̇m, Ökkeş Atici
Relationships Between Some Endogenous Signal Compounds And The Antioxidantsystem In Response To Chilling Stress In Maize (Zea Mays L.) Seedlings, Nevzat Esi̇m, Ökkeş Atici
Turkish Journal of Botany
This study investigated the correlation between endogenous levels of some signal compounds [nitric oxide (NO), salicylic acid (SA), abscisic acid (ABA)] and the antioxidant system in response to chilling stress in maize (Zea mays L.). Seedlings grown for 12 or 19 days under normal conditions (24/20 °C) were exposed to chilling stress (10/7 °C) for 2 days. The levels of NO, SA, ABA, hydrogen peroxide (H2O2), superoxide anion (O2.-), and malondialdehyde (MDA) were determined in leaves of seedlings harvested on day 14 and day 21. In the same seedlings, the activities of superoxide dismutase (SOD), peroxidase (POX), catalase (CAT), and …