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Articles by Masayuki Fujita
Total Records ( 2 ) for Masayuki Fujita
  Mirza Hasanuzzaman , Mohammad Anwar Hossain and Masayuki Fujita
  Abiotic stress is the major limiting factor of plant growth and crop yield. Better understanding of plant stress responses and tolerance is very important in the light of increasing intensities of stressors like salinity, drought, flooding, heavy metal, temperature extremes, high-light intensities, UB-radiation, herbicides, ozone and others, due to global climatic and other environmental changes. The role of Nitric oxide (NO) in stress responses in plants came in the focus of plant science in the last decade. NO is an important signaling molecule with diverse physiological and biochemical functions involving the induction of different intracellular plants processes, including the expression of defense-related and redox regulated genes against abiotic and biotic stress induced reactive oxygen species (ROS) detoxification. In spite of the significant progress that has been made in understanding NO biosynthesis and signaling in plant, several crucial questions remain unanswered. In this study, we reviewed the recent progress in NO research to reveal its diverse role in the physiological and biochemical processes in plants and the protective mechanisms towards abiotic stress tolerance.
  Mirza Hasanuzzaman , M. Anwar Hossain and Masayuki Fujita
  It is now well established that virtually all abiotic and biotic stresses induce or involve oxidative stress to some degree and the ability of plants to control oxidant levels is highly correlated with stress tolerance. Recently, the role of Selenium (Se) as an antioxidant has generated a wide interest in it. In trace amounts, Se is an essential micronutrient and has important benefits for animal and human nutrition although it has not been confirmed to be an essential micronutrient in higher plants. Selenium has been shown to exert a positive effect on crop growth and stress tolerance at low concentrations. However, the specific physiological mechanisms that underlie the positive effects of Se in plants have not been clearly elucidated. There is a wealth of evidence that low concentrations of Se enhance the growth of plants and improve antioxidative capacity of plants either by acting as antioxidant directly or by increasing the activities of antioxidant enzymes and bring out the tolerance under stressful condition. In contrast at high concentrations, Se acts as a pro-oxidant and leads to drastic reduction in yield. In this study we reviewed available literature regarding the possible regulatory role of Se in the various physiological processes of plants as well as its protective role under abiotic stress condition.
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