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首页> 美国卫生研究院文献>Marine Drugs >Induction of Natural Defenses in Tomato Seedlings by Using Alginate and Oligoalginates Derivatives Extracted from Moroccan Brown Algae
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Induction of Natural Defenses in Tomato Seedlings by Using Alginate and Oligoalginates Derivatives Extracted from Moroccan Brown Algae

机译：利用摩洛哥棕海藻中提取的藻酸盐和寡核苷酸衍生物诱导番茄幼苗中的自然防御

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Polysaccharides extracted from marine algae have attracted much attention due to their biotechnological applications, including therapeutics, cosmetics, and mainly in agriculture and horticulture as biostimulants, biofertilizers, and stimulators of the natural defenses of plants. This study aimed to evaluate the ability of alginate isolated from Bifurcaria bifurcata from the Moroccan coast and oligoalginates derivatives to stimulate the natural defenses of tomato seedlings. Elicitation was carried out by the internodal injection of bioelicitor solutions. The elicitor capacities were evaluated by monitoring the activity of phenylalanine ammonia-lyase (PAL) as well as polyphenols content in the leaves located above the elicitation site for 5 days. Alginate and oligoalginates treatments triggered plant defense responses, which showed their capacity to significantly induce the PAL activity and phenolic compounds accumulation in the leaves of tomato seedlings. Elicitation by alginates and oligoalginates showed an intensive induction of PAL activity, increasing from 12 h of treatment and remaining at high levels throughout the period of treatment. The amount of polyphenols in the leaves was increased rapidly and strongly from 12 h of elicitation by both saccharide solutions, representing peaks value after 24 h of application. Oligoalginates exhibited an effective elicitor capacity in polyphenols accumulation compared to alginate polymers. The alginate and oligosaccharides derivatives revealed a similar elicitor capacity in PAL activity whereas the accumulation of phenolic compounds showed a differential effect. Polysaccharides extracted from the brown seaweed Bifurcaria bifurcate and oligosaccharides derivatives induced significantly the phenylpropanoid metabolism in tomato seedlings. These results contribute to the valorization of marine biomass as a potential bioresource for plant protection against phytopathogens in the context of eco-sustainable green technology.
机译：从海藻中提取的多糖由于其生物技术应用而引起了很多关注，包括治疗剂，化妆品，以及主要在农业和园艺中作为生物刺激剂，生物元化器和植物自然防御的刺激器。本研究旨在评估来自摩洛哥海岸和寡头碱酸的藻类和寡核苷酸衍生物的藻酸盐分离的能力，刺激番茄幼苗的自然防御。通过分子注射生物煤油溶液进行诱导。通过监测苯丙氨酸氨 - 裂解酶（PAL）的活性以及位于引发位点上方的叶片中的多酚含量来评估Elicitor能力。藻酸盐和寡核苷酸治疗触发植物防御反应，其能够显着诱导番茄幼苗叶片中的PAL活性和酚类化合物积累。藻酸盐和寡核苷酸的诱导表现出密集的PAL活性诱导，从治疗的12小时增加并在整个治疗期间留下高水平。通过两种糖溶液，叶片中的多酚的量迅速且强烈地增加，两种糖溶液，在施用24小时后表示峰值。与藻酸盐聚合物相比，寡核苷酸在多酚积累中表现出有效的引导性能力。藻酸盐和寡糖衍生物揭示了PAL活性的相似的引导性能力，而酚类化合物的积累显示出差异效果。从棕色海藻比法分叉和寡糖衍生物中提取的多糖显着诱导番茄幼苗中的苯丙醇丙醇代谢。这些结果有助于在生态可持续绿色技术的背景下为植物保护植物保护植物保护的潜在生物源。

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