叶面施用水杨酸可增强番茄植株的抗氧化系统和光合效率

IF 1.2 4区 农林科学 Q2 AGRICULTURE, MULTIDISCIPLINARY Bragantia Pub Date : 2022-01-01 DOI:10.1590/1678-4499.20210320
E. Aires, A. Ferraz, B. Carvalho, F. P. Teixeira, J. Rodrigues, E. Ono
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引用次数: 7

摘要

西红柿是世界上最重要的蔬菜作物。由于水杨酸(SA)具有积极的生理作用,因此施用水杨酸可以提高作物产量。因此,本研究旨在评价SA对叶片抗氧化酶活性、叶绿素a荧光、气体交换和番茄抗环境胁迫产量的可能影响。该实验于2019年7月至12月在受保护的环境中使用Colossal番茄杂交品种进行。因此,采用5个SA剂量的随机区组设计,分别为:0;0.5;1;1.5和2 mM。然后,移植后15至60天(DAT)每周进行一次应用。在第45和60个DAT时,分析了酶活性,如超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和过氧化物酶(POD)活性、脂质过氧化、脯氨酸含量、叶绿素a荧光、气体交换和株高。试验结束时,还对果实重、总产量和商品产量进行了评价。结果表明,叶面施用SA通过增强抗氧化系统,减少脂质过氧化和qNP,提高光系统II和ETR效率,减轻了植物的环境胁迫。此外,气体交换也受到SA在气体中的作用的影响,有利于A和A / Ci。0.5 ~ 0.8 mM的SA剂量对番茄的总量和商品产量均有积极的促进作用。因此,叶面施用SA可减少氧化损伤,提高光合效率和果实产量。
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Foliar application of salicylic acid intensifies antioxidant system and photosynthetic efficiency in tomato plants
: Tomatoes are the most important and grown vegetable crop in the world. The salicylic acid (SA) application could improve crop yields due the positive physiological effects of this plant growth regulator. Thus, this study aimed to evaluate the possible effects of SA application on leaf regarding the intensification of antioxidant enzymes activities, chlorophyll a fluorescence, gas exchange, and tomato production against environmental stress. This experiment was conducted by the use of Colossal tomato hybrid in a protected environment between July and December 2019. Therefore, a randomized block design with five SA doses was used, as follows: 0; 0.5; 1; 1.5, and 2 mM. Then, applications were performed weekly from 15 to 60 days after transplantation (DAT). At the 45 th and the 60 th DAT, the enzymes activities were analysed, such as superoxide dismutase (SOD), catalase activity (CAT) and peroxidase (POD), lipid peroxidation, proline content, chlorophyll a fluorescence, gas exchange, and plant height. At the end of the experiment, fruit weight, total and commercial production were also evaluated. Results indicated that foliar application of SA reduced the environmental stress in plants through the intensification of antioxidant system that reduced lipid peroxidation and qNP and increased the efficiency of photosystem II and ETR. Furthermore, gas exchange was also influenced by the action of SA in g s , favouring A and A / Ci . The SA dose between 0.5 and 0.8 mM positively enabled the total and commercial production of tomatoes. Therefore, foliar application of SA reduced oxidative damage, and increased photosynthetic efficiency and fruit production.
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来源期刊
Bragantia
Bragantia AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
2.40
自引率
8.30%
发文量
33
审稿时长
4 weeks
期刊介绍: Bragantia é uma revista de ciências agronômicas editada pelo Instituto Agronômico da Agência Paulista de Tecnologia dos Agronegócios, da Secretaria de Agricultura e Abastecimento do Estado de São Paulo, com o objetivo de publicar trabalhos científicos originais que contribuam para o desenvolvimento das ciências agronômicas. A revista é publicada desde 1941, tornando-se semestral em 1984, quadrimestral em 2001 e trimestral em 2005. É filiada à Associação Brasileira de Editores Científicos (ABEC).
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