PDF(Pubmed)
Abstract：
Heavy metal accumulation is one of the major agronomic challenges that has seriously threatened food safety. As a result, metal-induced phytotoxicity concerns require quick and urgent action to retain and maintain the physiological activities of microorganisms, the nitrogen pool of soils, and the continuous yields of wheat in a constantly worsening environment. The current study was conducted to evaluate the plant growth-promoting endophytic Aspergillus flavus AUMC 16,068 and its EPS for improvement of plant growth, phytoremediation capacity, and physiological consequences on wheat plants (Triticum aestivum) under lead stress. After 60 days of planting, the heading stage of wheat plants, data on growth metrics, physiological properties, minerals content, and lead content in wheat root, shoot, and grains were recorded. Results evoked that lead pollution reduced wheat plants\' physiological traits as well as growth at all lead stress concentrations; however, inoculation with lead tolerant endophytic A. flavus AUMC 16,068 and its respective EPS alleviated the detrimental impact of lead on the plants and promoted the growth and physiological characteristics of wheat in lead-contaminated conditions and also lowering oxidative stress through decreasing (CAT, POD, and MDA), in contrast to plants growing in the un-inoculated lead polluted dealings. In conclusion, endophytic A. flavus AUMC 16,068 spores and its EPS are regarded as eco-friendly, safe, and powerful inducers of wheat plants versus contamination with heavy metals, with a view of protecting plant, soil, and human health.
摘要：
重金属积累是严重威胁食品安全的主要农艺挑战之一。因此,金属引起的植物毒性问题需要采取快速和紧急的行动来保留和维持微生物的生理活动，土壤的氮库，以及小麦在不断恶化的环境中的连续产量。本研究旨在评估促进植物生长的内生黄曲霉AUMC16,068及其EPS对植物生长的改善作用，植物修复能力，铅胁迫对小麦植株(普通小麦)的生理影响。种植60天后，小麦植株抽穗期,增长指标数据，生理特性，矿物质含量,小麦根中的铅含量，射击,并记录了谷物。结果表明，在所有铅胁迫浓度下，铅污染都会降低小麦植株的生理性状和生长；然而，用耐铅的内生植物A.flavusAUMC16,068及其各自的EPS接种减轻了铅对植物的有害影响，并促进了铅污染条件下小麦的生长和生理特性，并通过降低氧化应激（CAT，POD,和MDA），与未接种铅污染交易中生长的植物形成鲜明对比。总之,内生黄曲霉AUMC16,068个孢子及其EPS被认为是生态友好的，安全,和强大的小麦植物诱导剂对抗重金属污染，为了保护植物，土壤,和人类健康。
