一氧化氮对半水培系统中遭受盐胁迫的莴苣植物的保护作用

IF 4.6 Q2 MATERIALS SCIENCE, BIOMATERIALS
Isabelly Cristina da Silva Marques, João Domingos Rodrigues, Elizabeth Orika Ono, Dayane Mércia Ribeiro Silva, Geane Lourenço Bispo, Francisco de Assis de Oliveira
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引用次数: 0

摘要

使用含盐量高的低质水会导致植物新陈代谢发生一些变化,因此需要制定策略来促进其在农业中的使用。一氧化氮(NO)是生物或合成物质的一种替代品,对植物在盐胁迫条件下的生理和生化反应具有良好的影响,因为它能促进植物的适应和生长。本研究旨在评估氮氧化物对盐胁迫下生长的莴苣植物的影响。实验采用 5 × 2 因子排列的随机区组实验设计,包括五种浓度的硝普钠(SNP)(0、50、100、150 和 200 µM)和两种盐度的灌溉水(0.2 和 3.5 dS m-1:分别为无盐胁迫和有盐胁迫)。SNP 浓度每周施用一次(叶面喷施),作物周期内共施用三次。分析的变量包括:叶绿素 a 荧光、脂质过氧化、过氧化氢、抗氧化酶和脯氨酸含量。通过 SNP 供体叶面喷施浓度在 100 至 150 µM 之间的 NO,可提高光合系统的能量利用效率,并通过提高酶活性和脯氨酸含量来刺激植物防御,促进细胞解毒。因此,通过供体向低质水条件下的植物施用外源 NO 对减轻盐胁迫的有害影响非常重要。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Protective effect of nitric oxide on lettuce plants subjected to salt stress in semi-hydroponic system

Protective effect of nitric oxide on lettuce plants subjected to salt stress in semi-hydroponic system

Protective effect of nitric oxide on lettuce plants subjected to salt stress in semi-hydroponic system

The use of low-quality water, with high salt concentrations, can cause several changes in plant metabolism, requiring strategies to facilitate its use in agriculture. Nitric oxide (NO) is an alternative among biological or synthetic substances that has promising effects on the physiological and biochemical responses of plants under salt stress conditions, as it promotes acclimation and favors plant growth. The aim of this research was to evaluate the effect of NO on lettuce plants grown under salt stress. A randomized block experimental design was used in a 5 × 2 factorial arrangement consisting of five concentrations of sodium nitroprusside (SNP) (0, 50, 100, 150, and 200 µM) and two salinity levels of the irrigation water (0.2 and 3.5 dS m−1: without and with salt stress, respectively). SNP concentrations were applied weekly (foliar application), totaling three applications during the crop cycle. The variables analyzed included: chlorophyll a fluorescence, lipid peroxidation, hydrogen peroxide, antioxidant enzymes, and proline content. The foliar application of NO by SNP donor, at concentrations between 100 and 150 µM provided greater efficiency of energy use in the photosystems and stimulated plant defense by increasing enzyme activity and proline contents, promoting cell detoxification. Therefore, exogenous application of NO, by donors, to plants under low-quality water conditions is important to mitigate the harmful effects of salt stress.

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来源期刊
ACS Applied Bio Materials
ACS Applied Bio Materials Chemistry-Chemistry (all)
CiteScore
9.40
自引率
2.10%
发文量
464
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