This review focused on the role of plant growth-promoting rhizobacteria(PGPR)in enhancing plant growth and protecting against pathogens,highlighting their mechanisms of action,ecological benefits,and challenges.PGPR m...This review focused on the role of plant growth-promoting rhizobacteria(PGPR)in enhancing plant growth and protecting against pathogens,highlighting their mechanisms of action,ecological benefits,and challenges.PGPR mediate plant growth through several mechanisms,including nutrient acquisition,production of antimicrobial compounds and induction of systemic resistance.These mechanisms are critical in improving crop yields,especially under stressful conditions.This review examines the molecular mechanisms of PGPR-mediated plant pathogen control,cellular mechanisms of PGPR in plant pathogen control,ecological and environmental benefits of PGPR application.Despite their potential,PGPR application is limited by environmental variability,inconsistent efficacy,and challenges in formulation and commercialization.The review discusses these challenges and also provides solutions.Additionally,the review outlines the latest advancements in PGPR strain selection and their genetic modifications for enhanced resilience and biocontrol efficacy.PGPR are particularly crucial in addressing global food security challenges,exacerbated by climate change,and the need for sustainable agricultural practices.PGPR have been shown to increase crop yields by 20%–30%in drought-prone regions and reduce pesticide use by up to 50%,contributing to more sustainable farming.As research advances,PGPR can play a key role in reducing chemical input dependency and promoting long-term agricultural sustainability.This review examines the role of PGPR in pathogen control and highlights their potential to enhance agricultural sustainability.展开更多
利用从烤烟根际筛选的抗生菌、固氮菌、解磷菌和解钾菌菌株制成PGPR菌肥,进行田间完全区组随机试验,研究其在减施化肥的条件下对烤烟产量质量的影响。试验地土壤类型为黄棕壤,种植烤烟品种为云烟89,菌肥施用量30 kg hm-2,于烤烟移栽时...利用从烤烟根际筛选的抗生菌、固氮菌、解磷菌和解钾菌菌株制成PGPR菌肥,进行田间完全区组随机试验,研究其在减施化肥的条件下对烤烟产量质量的影响。试验地土壤类型为黄棕壤,种植烤烟品种为云烟89,菌肥施用量30 kg hm-2,于烤烟移栽时溶于生根水中一起施入。共设4个处理,分别是(1)常规施肥同时施用PGPR菌肥;(2)NPK肥为常规施肥的80%同时施用PGPR菌肥;(3)常规施肥;(4)NPK肥为常规施肥的80%。结果表明,施用菌肥的二处理与未施用菌肥的二处理相比,施用菌肥不同生长期烤烟根际放线菌的数量显著降低17%～27%(p<0.05),根际微生物生物量碳含量提高3%～16%,现蕾期根际解磷菌的数量显著提高24%(p<0.05),并可提高烤烟的抗病性,烤后烟外观质量好。处理(2)与处理(4)比较,现蕾期烤烟根际氮、钾、铜、锌、硼和铁6种元素的有效性提高4.46%～28.87%,而磷、钙、镁和锰4种矿质元素的有效性降低2.63%～30.19%,烤烟产量和净产值分别提高7.53%和30.05%。处理(2)与处理(3)比较,烤烟产量和净产值分别提高4.52%和24.68%。使用PGPR菌肥可适当减少化肥用量,为可持续生产优质、无公害烟叶的有效途径之一。展开更多
文摘This review focused on the role of plant growth-promoting rhizobacteria(PGPR)in enhancing plant growth and protecting against pathogens,highlighting their mechanisms of action,ecological benefits,and challenges.PGPR mediate plant growth through several mechanisms,including nutrient acquisition,production of antimicrobial compounds and induction of systemic resistance.These mechanisms are critical in improving crop yields,especially under stressful conditions.This review examines the molecular mechanisms of PGPR-mediated plant pathogen control,cellular mechanisms of PGPR in plant pathogen control,ecological and environmental benefits of PGPR application.Despite their potential,PGPR application is limited by environmental variability,inconsistent efficacy,and challenges in formulation and commercialization.The review discusses these challenges and also provides solutions.Additionally,the review outlines the latest advancements in PGPR strain selection and their genetic modifications for enhanced resilience and biocontrol efficacy.PGPR are particularly crucial in addressing global food security challenges,exacerbated by climate change,and the need for sustainable agricultural practices.PGPR have been shown to increase crop yields by 20%–30%in drought-prone regions and reduce pesticide use by up to 50%,contributing to more sustainable farming.As research advances,PGPR can play a key role in reducing chemical input dependency and promoting long-term agricultural sustainability.This review examines the role of PGPR in pathogen control and highlights their potential to enhance agricultural sustainability.
文摘利用从烤烟根际筛选的抗生菌、固氮菌、解磷菌和解钾菌菌株制成PGPR菌肥,进行田间完全区组随机试验,研究其在减施化肥的条件下对烤烟产量质量的影响。试验地土壤类型为黄棕壤,种植烤烟品种为云烟89,菌肥施用量30 kg hm-2,于烤烟移栽时溶于生根水中一起施入。共设4个处理,分别是(1)常规施肥同时施用PGPR菌肥;(2)NPK肥为常规施肥的80%同时施用PGPR菌肥;(3)常规施肥;(4)NPK肥为常规施肥的80%。结果表明,施用菌肥的二处理与未施用菌肥的二处理相比,施用菌肥不同生长期烤烟根际放线菌的数量显著降低17%～27%(p<0.05),根际微生物生物量碳含量提高3%～16%,现蕾期根际解磷菌的数量显著提高24%(p<0.05),并可提高烤烟的抗病性,烤后烟外观质量好。处理(2)与处理(4)比较,现蕾期烤烟根际氮、钾、铜、锌、硼和铁6种元素的有效性提高4.46%～28.87%,而磷、钙、镁和锰4种矿质元素的有效性降低2.63%～30.19%,烤烟产量和净产值分别提高7.53%和30.05%。处理(2)与处理(3)比较,烤烟产量和净产值分别提高4.52%和24.68%。使用PGPR菌肥可适当减少化肥用量,为可持续生产优质、无公害烟叶的有效途径之一。
