Nitric Oxide Modulates Salt Stress Tolerance in Lettuce

IF 2.6 3区工程技术 Q2 MECHANICS

Journal of Thermal Stresses Pub Date : 2023-10-07 DOI:10.3390/stresses3040048

Isabelly Cristina da Silva Marques, Dayane Mércia Ribeiro Silva, Geane Lourenço Bispo, Francisco de Assis de Oliveira, Elizabeth Orika Ono, João Domingos Rodrigues

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引用次数: 0

Abstract

Crops are constantly threatened by salinity. Nitric oxide (NO) is an attenuating agent for salt stress; however, the specific roles of NO in gas exchange and lettuce production are not well established. The objective of this study was to evaluate the application of different concentrations of sodium nitroprusside (SNP) as an agent to mitigate salt stress in lettuce plants. Lettuce seedlings in pots were subjected to irrigation without and with saline water (0.2 and 3.5 dS m−1) and applications of different concentrations (0, 50, 100, 150, and 200 µM) of SNP, a NO donor. Saline stress negatively affected lettuce development with a reduction of 29.5% in leaf area, 6.3% in relative water content in the leaf, 17.2% in stem diameter, and 10.7% in dry matter mass in the control, but the application of SNP mitigated the deleterious effects of salt stress. Concentrations between 100 and 150 µM of SNP improved the photosynthetic metabolism of lettuce under salinity, with an increase of 46.7% in CO2 assimilation and 42.3% in fresh matter mass. Pearson’s correlation showed that fresh matter correlated positively with CO2 assimilation. Therefore, SNP can be used to mitigate salt stress in lettuce.

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一氧化氮调节生菜耐盐性

农作物经常受到盐碱化的威胁。一氧化氮(NO)是盐胁迫的衰减剂;然而，NO在气体交换和生菜生产中的具体作用尚不清楚。本研究的目的是评价不同浓度硝普钠(SNP)作为缓解生菜盐胁迫的药剂的应用。盆栽莴苣幼苗分别用盐水(0.2和3.5 dS m−1)和不同浓度(0、50、100、150和200µm)的SNP (NO供体)灌溉。盐胁迫对生菜的生长发育有负面影响，对照的叶面积减少29.5%，叶片相对含水量减少6.3%，茎粗减少17.2%，干物质质量减少10.7%，但SNP的施用减轻了盐胁迫的有害影响。100 ~ 150µM的SNP处理改善了盐胁迫下生菜的光合代谢，CO2同化提高46.7%，鲜物质质量提高42.3%。Pearson相关表明，新鲜物质与CO2同化呈正相关。因此，SNP可用于缓解生菜的盐胁迫。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Thermal Stresses 工程技术-力学

CiteScore

5.20

自引率

7.10%

发文量

审稿时长

3 months

期刊介绍： The first international journal devoted exclusively to the subject, Journal of Thermal Stresses publishes refereed articles on the theoretical and industrial applications of thermal stresses. Intended as a forum for those engaged in analytic as well as experimental research, this monthly journal includes papers on mathematical and practical applications. Emphasis is placed on new developments in thermoelasticity, thermoplasticity, and theory and applications of thermal stresses. Papers on experimental methods and on numerical methods, including finite element methods, are also published.