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首页> 外文期刊>Plant and Soil >The application of a treated sugar beet waste residue to soil modifies the responses of mycorrhizal and non mycorrhizal lettuce plants to drought stress
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The application of a treated sugar beet waste residue to soil modifies the responses of mycorrhizal and non mycorrhizal lettuce plants to drought stress

机译：经处理的甜菜废渣在土壤中的施用改变了菌根和非菌根生菜植物对干旱胁迫的响应

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摘要

Positive effects of sugar beet (SB) application on soil properties and performance of several woody shrub legumes have been described under heavy metal stress and in diverse degraded environments, especially when combined with arbuscular mycorrhiza (AM). However, information on the combined effect of SB amendments and AM symbiosis in horticultural crop plants under drought stress is scarce. Thus, the main objective of this work was to determine if the combination of treated SB waste and AM fungi results in improved drought tolerance of an horticultural food crop such as lettuce and whether or not the effects observed are linked to enhanced antioxidant activities and regulation of two stress-related genes. Lettuce plants inoculated or not with Glomus intraradices and grown on soil amended or not with a treated SB waste were cultivated under well-watered conditions or subjected to drought stress. Plant growth, expression of two drought responsive genes encoding for Delta(1)-pyrroline-5-carboxylate synthetase and 9-cis-epoxycarotenoid dioxygenase, oxidative damage to lipids and the activity of four antioxidant enzymes were measured. Results showed that the application of treated SB waste resulted negative for the development of AM and nonAM plants (both under well-watered and under drought stress conditions). This effect can not be ascribed to the impairment of specific plant antioxidant defenses. In contrast, a lack of induction of a gene from the ABA biosynthetic pathway was observed in SB-treated plants, which could have contributed to the low performance of these plants. The positive effects of combined application of treated SB waste as amendment and AM fungi have not been shown for a horticultural food crop such as Lactuca sativa. Thus, before starting a program aimed at the utilization of different amendments based on transformed wastes, basic studies on functional and physiological compatibility between the plant and the amendment are necessary.
机译：在重金属胁迫下和在各种退化的环境中，特别是与丛枝菌根（AM）结合使用时，已描述了甜菜（SB）施用对几种木质灌木豆科植物的土壤特性和性能的积极影响。但是，关于干旱胁迫下园艺作物中SB修正和AM共生的综合作用的信息很少。因此，这项工作的主要目的是确定经过处理的SB废物和AM真菌的结合是否能提高园艺食品作物（如生菜）的耐旱性，以及观察到的效果是否与增强的抗氧化活性和对大豆的调节有关。两个与压力有关的基因。在良好灌溉条件下或在干旱胁迫下种植莴苣植株，该植株需接种或不接种Glomus内辐射菌，然后在经过改良或未经过SB处理的土壤上生长。测量了植物的生长，两个编码Delta（1）-吡咯啉-5-羧酸合成酶和9-顺式-环氧类胡萝卜素双加氧酶的干旱反应基因的表达，脂质的氧化损伤和四种抗氧化酶的活性。结果表明，处理后的SB废物的使用对AM和nonAM植物的生长产生不利影响（无论是在水源充足还是在干旱胁迫条件下）。这种作用不能归因于特定的植物抗氧化剂防御能力的损害。相反，在经SB处理的植物中观察到缺乏来自ABA生物合成途径的基因的诱导，这可能导致这些植物的性能低下。还没有显示出将园艺用SB废物作为改良剂和AM真菌的组合施用对园艺食品作物（如苜蓿）的积极作用。因此，在启动旨在利用基于转化废物的不同修正案的计划之前，必须对植物与修正案之间的功能和生理相容性进行基础研究。

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