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Mutualistic fungus Piriformospora indica modulates cadmium phytoremediation properties of host plant via concerted action of enzymatic and non-enzymatic biochemicals

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Pedosphere 2022年第2期32卷 256-267页

作者： Muhammad KHALID Saeed UR-RAHMAN Haoxin TAN Lantian SU Pei ZHOU Nan HUI Key Laboratory of Urban Agriculture School of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China Joint International Research Laboratory of Metabolic&Developmental Sciences Key Laboratory of Urban Agriculture(South)Ministry of AgriculturePlant Biotechnology Research CenterFudan-SJTU-Nottingham Plant Biotechnology R&D CenterSchool of Agriculture and BiologyShanghai Jiao Tong UniversityShanghai 200240China Shanghai Yangtze River Delta Eco-Environmental Change and Management Observation and Research Station Ministry of Science and TechnologyMinistry of Education800 Dongchuan Rd.Shanghai 200240China Shanghai Urban Forest Ecosystem Research Station National Forestry and Grassland Administration800 Dongchuan Rd.Shanghai 200240China

Soils and ecosystems contaminated with cadmium (Cd) threaten human health and adversely affect morphological,physiological,and biochemical parameters of *** symbiotic association of endophytic fungi with their host plants is the best strategy to improve various plant characteristics and remediate soils polluted with heavy metal(loid)s (HMs).Being a well-known plant growth-promoting fungus,Piriformospora indica confers resistance against a number of abiotic stresses,including HM *** pot experiment explored the potential and ameliorative effects of *** on Artemisia annua *** treated with different concentrations (0,40,80,and 120 mg kg-1) of *** with *** significantly increased plant performance,especially by enhancing chlorophyll concentration and water potential and by decreasing electrolytic leakage,when compared with un-inoculated plants,despite the high Cd ***,*** enhanced antioxidant enzyme activities,thereby reducing the drastic effects of Cd in inoculated *** addition,*** accumulated Cd in the roots of colonized plants,as revealed by atomic absorption spectroscopy,and restricted Cd translocation to aerial ***,*** showed in vitro resistance (up to a certain level) to Cd stress;however,fungus growth was inhibited at very high Cd concentrations,proving it an excellent candidate for use as a potential phytoremediator in fields affected by Cd *** transcriptional analysis showed that the signaling genes and artemisinin and flavonoid biosynthetic pathway genes were significantly upregulated in ***-co-cultivated plants when compared with un-inoculated plants,suggesting a fine collaboration between primary and secondary metabolisms to modulate resistance capacity and to enhance the phytoremediation capability of *** against Cd toxicity.

关键词： Artemisia annua defence-related gene endophytic fungi fungal inoculation heavy metal stress plant growth promotion soil contamination transcripts

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