2-Hydroxymelatonin promotes the resistance of rice plant to multiple simultaneous abiotic stresses (combined cold and drought).

摘要: We investigated the physiological roles of 2-hydroxymelatonin (2-OHMel) in rice seedlings. When they were challenged with simultaneous multiple abiotic stressors, such as a combination cold and drought, those pretreated 2-OHMel resistant, whereas no tolerance was observed seedlings treated either melatonin or water (control). The phenotype associated induction several transporter proteins, including proton (UCP1), potassium (HKT1), channel protein (PIP2;1). Treatment increased content osmoprotectant proline maintained mitochondrial structure when plants subjected to drought stress. screened corresponding transcription factors (TFs) for 2-OHMel-mediated resistance combined stressors through analysis large numbers cold- drought-related TFs. Two TFs, Myb4 AP37, only induced by treatment. Transgenic lines overexpressing not resistant stressors; however, expression UCP1, HKT1, PIP2;1 transcripts slightly enhanced. These data show that alleviates effects via actions AP37.