盐胁迫和过氧化氢条件下樱桃番茄的光合色素、生长和产量

J. Nóbrega, M. A. Guedes, G. S. Lima, H. Gheyi, L. A. A. Soares, L. A. Silva, S. S. Silva, Larissa A. Brito
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摘要

摘要 水和/或土壤中的盐分过高是影响包括樱桃番茄在内的农作物生长发育的主要胁迫之一,需要采用叶面喷施过氧化氢等策略来减少盐胁迫的影响。因此,本研究旨在评估在灌溉水盐度条件下叶面喷施 H2O2 对樱桃番茄光合色素含量、生长和产量的影响。采用的设计是随机区组,5 × 5 的析因方案,五种水的电导率 - ECw 值(0.3、1.0、1.7、2.4 和 3.1 dS m-1)和五种浓度的过氧化氢 - H2O2(0、15、30、45 和 60 μM)。浓度为 60 μM 的过氧化氢可减轻盐胁迫对樱桃番茄生长和叶片数量的有害影响,ECw 为 3.1 dS m-1。过氧化氢浓度为 45 μM 时,在水的电导率为 0.3 dS m-1 的条件下,可增加根的干重、叶绿素 b 和总叶绿素的合成;在电导率为 0.8 dS m-1 的条件下,可增加叶绿素 a 的合成。叶面施肥 30 μM 可减少盐胁迫对叶片、嫩枝和总干物质积累的影响,ECw 为 3.1 dS m-1。水的导电率从 1.41 dS m-1 开始降低了樱桃番茄的产量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Photosynthetic pigments, growth, and production of cherry tomato under salt stress and hydrogen peroxide
ABSTRACT Excess of salts in water and/or soil stands out as one of the stresses that compromise the development of crops, including cherry tomato, requiring the use of strategies that reduce salt stress effects, such as foliar application of hydrogen peroxide. Thus, the objective of this study was to evaluate the effect of foliar application of H2O2 on the contents of photosynthetic pigments, growth, and production of cherry tomato under irrigation water salinity. The design used was randomized blocks, in a 5 × 5 factorial scheme, with five values of electrical conductivity of water - ECw (0.3, 1.0, 1.7, 2.4, and 3.1 dS m-1) and five concentrations of hydrogen peroxide - H2O2 (0, 15, 30, 45, and 60 μM). Application of hydrogen peroxide at concentration of 60 μM attenuated the deleterious effects of salt stress on the growth and number of leaves of cherry tomato up to ECw of 3.1 dS m-1. Hydrogen peroxide concentration of 45 μM increased root dry mass, synthesis of chlorophyll b and total chlorophyll under electrical conductivity of water of 0.3 dS m-1 and synthesis of chlorophyll a up to ECw of 0.8 dS m-1. Foliar application of 30 μM reduced the effects of salt stress on leaf, shoot and total dry mass accumulation up to ECw of 3.1 dS m-1. Electrical conductivity of water from 1.41 dS m-1 reduced the production of cherry tomato.
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