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首页> 外文期刊>European Journal of Plant Pathology >PGPM-induced defense-related enzymes in aerobic rice against rice leaf blast caused by Pyricularia oryzae
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PGPM-induced defense-related enzymes in aerobic rice against rice leaf blast caused by Pyricularia oryzae

机译：PGPM诱导有氧水稻对稻瘟病菌引起的稻瘟病的防御相关酶

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Rice blast caused by Pyricularia oryzae is the most devastative disease especially under aerobic cultivation systems. The bio-efficacy of plant growth-promoting microorganisms: Pseudomonas aeruginosa (UPMP1), Corynebacterium agropyri (UPMP7), Enterobacter gergoviae (UPMP9) and Bacillus amyloliquefaciens (UPMS3), Trichoderma harzianum (UPMT1) and Trichoderma virens (UPMT2) in induction of defense-related enzymes against Pyricularia oryzae was evaluated in rice cultivated under aerobic conditions. Under dual culture plate testing, all PGPMs indicated antagonism against P. oryzae with percentage inhibition radial growth (PIRG) which ranged from 51.69-81.97 %. The bio-efficacy of the respective PGPM in induction of defense-related enzymes in rice seedlings was evaluated based on individual inoculation before challenged inoculation with P. oryzae under greenhouse conditions. Inoculation of all PGPMs significantly reduced rice leaf blast severity at day eight after P. oryzae inoculation. The reduction in rice leaf blast disease severity was associated to the increase of peroxidase (PO), polyphenol oxidase (PPO) and phenylalanine ammonia-lyase (PAL) activities in rice seedlings when pre-inoculated with PGPMs. The highest leaf blast disease reduction (59.17 %) occurred with rice seedlings pre-inoculated with C. agropyri (UPMP9), followed by P. aeruginosa (UPMP1) (40.65 %), T. harzianum (UPMT1) (42.23 %), T. virens (UPMT2) (20.85 %), E. gergoviae (UPMP9) (17.84 %) and B. amyloliquefaciens (UPMS3). The high efficiency of PGPM in leaf blast disease suppression was associated with significant increase in total microbial activity (FDA hydrolysis) in rhizosphera soil (4.80-7.86 mu g/g/0.5 h) compared to the control (2.25 mu g/g/0.5 h). Thus, the application of PGPM is a potential alternative approach in rice leaf blast disease management of aerobic rice.
机译：由稻瘟病菌引起的稻瘟病是最具破坏性的疾病，尤其是在有氧栽培系统下。促进植物生长的微生物的生物功效：铜绿假单胞菌（UPMP1），农杆菌棒状杆菌（UPMP7），格氏肠杆菌（UPMP9）和解淀粉芽孢杆菌（UPMS3），哈茨木霉（UPMT1）和抗木霉菌（UPMS2）在有氧条件下栽培的水稻中评估了与稻瘟病菌相关的酶。在双重培养板测试中，所有PGPM均显示出对米曲霉的拮抗作用，其抑制放射状生长百分比（PIRG）为51.69-81.97％。在温室条件下用稻瘟病菌挑战接种之前，基于个体接种来评估各自PGPM在水稻幼苗中防御相关酶的诱导中的生物功效。在稻瘟病菌接种后第8天，接种所有PGPM可以显着降低稻瘟病的严重性。预先接种PGPM后，稻苗中稻瘟病严重程度的降低与过氧化物酶（PO），多酚氧化酶（PPO）和苯丙氨酸氨解酶（PAL）活性的增加有关。预先接种农杆菌（UPMP9）的水稻幼苗发生的叶瘟病危害最高（59.17％），其次是铜绿假单胞菌（UPMP1）（40.65％），哈茨木霉（UPMT1）（42.23％），T病毒（UPMT2）（20.85％），格氏大肠杆菌（UPMP9）（17.84％）和解淀粉芽孢杆菌（UPMS3）。与对照组（2.25μg/ g / 0.5）相比，PGPM在抑制叶瘟病中的高效率与根际土壤中的总微生物活性（FDA水解）显着增加（4.80-7.86μg/ g / 0.5 h）有关H）。因此，PGPM的应用是有氧水稻稻瘟病管理中的潜在替代方法。

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