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Foliar spraying of calcium acetate alleviates yield loss in rice (Oryza sativa L.) by induced anti‐oxidative defence system under ozone and heat stresses
Annals of Applied Biology ( IF 2.2 ) Pub Date : 2020-10-06 , DOI: 10.1111/aab.12653 Kittisak Lakaew 1 , Saengchai Akeprathumchai 1 , Paitip Thiravetyan 1
Annals of Applied Biology ( IF 2.2 ) Pub Date : 2020-10-06 , DOI: 10.1111/aab.12653 Kittisak Lakaew 1 , Saengchai Akeprathumchai 1 , Paitip Thiravetyan 1
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Ozone (O3) and heat stresses induce oxidative damage of plant cells; consequently, this causes reductions in yield of crop plants. As one of the most important staple crops, rice also suffers from these stresses. The aims of this study were to explore the effect of the growing season (rainy and summer season) on rice yield and the effect of calcium acetate (CA) on rice via foliar spraying, under both O3 and heat stresses experienced in the summer season. Results showed that O3‐induced cell damages are indicated by an increase in malondialdehyde (MDA) level as well as rice yield losses. Moreover, it was found that rice yield under O3 exposure was reduced, around 88.72%, when comparing between rice grown in the summer and rainy season. Pretreatment of rice with 5 mM CA under O3 and heat stresses stimulated activity and expressions of ascorbate peroxidase (APX); consequently, this mitigated oxidative damage by lowering MDA content. In addition, CA pretreatment in rice under the ozone and heat stresses enhanced nicotinamide adenine dinucleotide phosphate (NADPH) contents and chlorophyll content resulting in higher rice yield in comparison with non‐CA pretreatment. Thus, foliar application of CA on rice relieved yield losses caused by the combined O3 and heat stresses by modulating the major antioxidant enzyme, APX and contents of NADPH, which are important compounds for cell growth and detoxification.
中文翻译：
叶面喷洒乙酸钙通过在臭氧和热胁迫下诱导的抗氧化防御系统减轻水稻（Oryza sativa L.）的产量损失
臭氧（O 3）和热胁迫会诱导植物细胞的氧化损伤。因此，这导致农作物产量下降。作为最重要的主食作物之一，水稻也遭受这些压力。这项研究的目的是探讨在夏季经历的O 3和热胁迫下，通过叶面喷雾研究生长期（雨季和夏季）对水稻产量的影响以及乙酸钙（CA）对水稻的影响。结果表明，丙二醛（MDA）水平升高以及水稻产量损失表明了O 3诱导的细胞损伤。此外，发现在O 3下水稻产量与夏季和雨季种植的水稻相比，暴露量减少了约88.72％。在O 3和热胁迫下用5 mM CA预处理水稻可刺激活性和抗坏血酸过氧化物酶（APX）的表达；因此，这通过降低MDA含量减轻了氧化损伤。此外，在臭氧和热胁迫下，水稻的CA预处理与非CA预处理相比，可提高烟酰胺腺嘌呤二核苷酸磷酸（NADPH）和叶绿素的含量，从而提高水稻产量。因此，通过调节主要抗氧化酶，APX和NADPH的含量，CA在水稻上的叶面施用减轻了O 3和热胁迫共同作用所导致的产量损失，这是细胞生长和排毒的重要化合物。
更新日期：2020-10-06
中文翻译：
叶面喷洒乙酸钙通过在臭氧和热胁迫下诱导的抗氧化防御系统减轻水稻（Oryza sativa L.）的产量损失
臭氧（O 3）和热胁迫会诱导植物细胞的氧化损伤。因此，这导致农作物产量下降。作为最重要的主食作物之一，水稻也遭受这些压力。这项研究的目的是探讨在夏季经历的O 3和热胁迫下，通过叶面喷雾研究生长期（雨季和夏季）对水稻产量的影响以及乙酸钙（CA）对水稻的影响。结果表明，丙二醛（MDA）水平升高以及水稻产量损失表明了O 3诱导的细胞损伤。此外，发现在O 3下水稻产量与夏季和雨季种植的水稻相比，暴露量减少了约88.72％。在O 3和热胁迫下用5 mM CA预处理水稻可刺激活性和抗坏血酸过氧化物酶（APX）的表达；因此，这通过降低MDA含量减轻了氧化损伤。此外，在臭氧和热胁迫下，水稻的CA预处理与非CA预处理相比，可提高烟酰胺腺嘌呤二核苷酸磷酸（NADPH）和叶绿素的含量，从而提高水稻产量。因此，通过调节主要抗氧化酶，APX和NADPH的含量，CA在水稻上的叶面施用减轻了O 3和热胁迫共同作用所导致的产量损失，这是细胞生长和排毒的重要化合物。
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