http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Melatonin improves antioxidant defense mechanism of basil under drought stress
Naghizadeh Mehdi,Reiter Russel J.,Kabiri Rozita,Moradi Rooholla 한국원예학회 2024 Horticulture, Environment, and Biotechnology Vol.65 No.1
Basil ( Ocimum basilicum L.) is a highly important medicinal plant. In this study, the interactional eff ects of water defi cit and melatonin application on growth and physio-biochemical characteristics of basil were investigated. The treatments included three levels of irrigation (100, 75 and 50% of fi eld capacity) and three melatonin concentrations (0, 50 and 100 μmol). Drought stress decreased the dry weight of plants but application of 100 μmol melatonin markedly increased dry weight under these conditions. Melatonin profoundly enhanced plant drought tolerance by stimulating the antioxidant enzymes (catalase, phenylalanine ammonia-lyase, ascorbate peroxidase and polyphenol oxidase) activities and secondary metabolites (total phenol, fl avonoid and anthocyanin contents). Furthermore, melatonin application reduced lipid peroxi dation and increased the relative water content and photosynthetic pigments, resulting in an improvement of plant dry matter. It is concluded that foliar spraying with melatonin induced the pre-adaptive responses to drought stress followed by regulating antioxidant defense mechanisms.