The role of melatonin (MT) in promoting tolerance to salt stress and boron toxicity in soybean and pepper plants was investigated. The treatments comprised: Control (C), salt stress (SS; 100 mM NaCl), boron toxicity (BT; 2 mM B) and SS + BT. Harmful effects of combined stresses resulted in a greater decrease in plant biomass and chlorophyll contents in both plants compared to those of a single stress. However, SS and BT increased electron leakage, and contents of H2O2, proline and MDA, while an increase was observed in the activities of POD, SOD and CAT. Foliar applied MT (100 μM) caused an increase in fresh and dry mass and photosynthetic pigments of plants of both crops under both stresses imposed singly or in combination. However, melatonin reduced electron leakage, and the contents of H2O2 and MDA. Proline contents in the pepper plants increased with MT application, while they decreased in the soybean plants. The activities of vital antioxidant enzymes, POD, SOD and CAT were found to be increased with MT application in both plants.
研究了褪黑素(melatonin, MT)对大豆和辣椒耐盐性和硼毒性的促进作用。处理包括:对照(C)、盐胁迫(SS);100 mM NaCl)，硼毒性(BT;2 mM B)和SS + BT。与单一胁迫相比，复合胁迫对两种植物生物量和叶绿素含量的影响更大。然而，SS和BT增加了电子泄漏，增加了H2O2、脯氨酸和MDA含量，增加了POD、SOD和CAT活性。叶片施加MT (100 μM)对两种作物的鲜质量、干质量和光合色素均有显著提高。而褪黑素降低了电子泄漏，降低了H2O2和MDA的含量。辣椒植株脯氨酸含量随MT的施用而增加，大豆植株脯氨酸含量随MT的施用而减少。两种植株的重要抗氧化酶、POD、SOD和CAT活性均随MT施用而增加。
{"title":"Melatonin improves tolerance to salt stress and boron toxicity in soybean and pepper plants","authors":"A. Sarioglu, C. Kaya","doi":"10.56612/ijaeb.v1i1.8","DOIUrl":"https://doi.org/10.56612/ijaeb.v1i1.8","url":null,"abstract":"The role of melatonin (MT) in promoting tolerance to salt stress and boron toxicity in soybean and pepper plants was investigated. The treatments comprised: Control (C), salt stress (SS; 100 mM NaCl), boron toxicity (BT; 2 mM B) and SS + BT. Harmful effects of combined stresses resulted in a greater decrease in plant biomass and chlorophyll contents in both plants compared to those of a single stress. However, SS and BT increased electron leakage, and contents of H2O2, proline and MDA, while an increase was observed in the activities of POD, SOD and CAT. Foliar applied MT (100 μM) caused an increase in fresh and dry mass and photosynthetic pigments of plants of both crops under both stresses imposed singly or in combination. However, melatonin reduced electron leakage, and the contents of H2O2 and MDA. Proline contents in the pepper plants increased with MT application, while they decreased in the soybean plants. The activities of vital antioxidant enzymes, POD, SOD and CAT were found to be increased with MT application in both plants.","PeriodicalId":210846,"journal":{"name":"International Journal of Applied and Experimental Biology","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122805977","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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