利用根际真菌Talaromyces purpureogenus PH7促进玉米磷吸收和减轻铅胁迫

IF 1.5 4区 环境科学与生态学 Q4 ENVIRONMENTAL SCIENCES
Iqbal Hussain, Muhammad Irshad, Anwar Hussain, Muhammad Qadir, Asif Mehmood, Muneeb urrehman, Naeem Khan
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引用次数: 0

摘要

由于铅(Pb)等有毒污染物渗入食物链,对包括人类在内的所有生物构成严重风险,现代农业面临着重大的环境挑战。利用微生物减轻污染的生物修复提供了一种可持续的、具有成本效益的解决方案。本研究从Parthenium hysterophorus根际分离到一株真菌PH7,通过ITS 1和ITS 4 rRNA区域的遗传分析,鉴定为Talaromyces purpureogenus。初步筛选显示,它能够溶解磷酸盐,并产生关键的植物生长调节剂,包括吲哚乙酸(IAA)和水杨酸(SA),以及有益的代谢物,如酚类物质、糖、蛋白质、脂质和类黄酮。该菌株对铅的耐受性可达800µg/g,同时在液体培养中增强了抗氧化防御系统。在500µg/g Pb胁迫下,玉米(Zea mays L.)根长(29.2%)、茎长(30.4%)、鲜重(24.5%)和干重(53.5%)显著减少。然而,紫红色葡萄球菌处理显著提高了这些参数,以及叶绿素和类胡萝卜素水平。处理过的植物还显示出增强的抗氧化活性,包括酶和非酶抗氧化剂水平的提高。这些发现强调了紫皮草作为生物修复剂和生物肥料的双重作用,能够恢复铅污染土壤,提高农业生产力和植物健康。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Enhancing Phosphorus Uptake and Mitigating Lead Stress in Maize Using the Rhizospheric Fungus Talaromyces purpureogenus PH7

Enhancing Phosphorus Uptake and Mitigating Lead Stress in Maize Using the Rhizospheric Fungus Talaromyces purpureogenus PH7

Modern agriculture faces significant environmental challenges due to toxic contaminants like lead (Pb), which infiltrate the food chain and pose severe risks to all living organisms, including humans. Bioremediation, utilizing microorganisms to mitigate contamination, offers a sustainable and cost-effective solution. In this study, a fungal strain, PH7, was isolated from the rhizosphere of Parthenium hysterophorus and identified as Talaromyces purpureogenus through genetic analysis of ITS 1 and ITS 4 rRNA regions. Preliminary screenings revealed its ability to solubilize phosphate and produce key plant growth regulators, including indole acetic acid (IAA) and salicylic acid (SA), alongside beneficial metabolites like phenolics, sugars, proteins, lipids, and flavonoids. The strain demonstrated substantial Pb tolerance, up to 800 µg/g, while enhancing the antioxidant defense system in liquid culture. Under 500 µg/g Pb stress, maize (Zea mays L.) exhibited a significant reduction in root length (29.2%), shoot length (30.4%), fresh weight (24.5%), and dry weight (53.5%). However, treatment with T. purpureogenus markedly improved these parameters, along with chlorophyll and carotenoid levels. The treated plants also showed enhanced antioxidant activity, including elevated levels of enzymatic and nonenzymatic antioxidants. These findings highlight the dual role of T. purpureogenus as a bioremediant and biofertilizer, capable of restoring Pb-contaminated soils and enhancing agricultural productivity and plant health.

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来源期刊
Clean-soil Air Water
Clean-soil Air Water 环境科学-海洋与淡水生物学
CiteScore
2.80
自引率
5.90%
发文量
88
审稿时长
3.6 months
期刊介绍: CLEAN covers all aspects of Sustainability and Environmental Safety. The journal focuses on organ/human--environment interactions giving interdisciplinary insights on a broad range of topics including air pollution, waste management, the water cycle, and environmental conservation. With a 2019 Journal Impact Factor of 1.603 (Journal Citation Reports (Clarivate Analytics, 2020), the journal publishes an attractive mixture of peer-reviewed scientific reviews, research papers, and short communications. Papers dealing with environmental sustainability issues from such fields as agriculture, biological sciences, energy, food sciences, geography, geology, meteorology, nutrition, soil and water sciences, etc., are welcome.
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