水稻生长促进叶面和根际细菌在防治水稻黄单胞菌中的潜在作用。oryzae

Integrative Advances in Rice Research [Working Title] Pub Date : 2021-10-27 DOI:10.5772/intechopen.99854

Md. Mahfujur Rahman, Md. Mostafa Masud, M. Iqbal Hossain, Nurali Islam, M. Zahangir Alam, M. Mamunur Rashid, Mohammad Ashik Iqbal Khan, M. Abdul Latif, Krishna Pada Halder, Md. Rashidul Islam

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引用次数: 2

摘要

大米是世界上重要的谷物，在孟加拉国的谷物中占据首位。水稻遭受大约32种病害，其中10种是目前孟加拉国的主要病害。其中，由稻瘟弧菌引起的细菌性疫病(BB)。稻瘟病(Xoo)被认为是一种最具破坏性的疾病，发生在孟加拉国的雨养季节和灌溉季节。BB造成相当大的产量损失，根据疫情的不同，损失从30%到50%不等。在大多数南亚和东南亚国家，它也是一种重要疾病。从水稻叶面和根际共鉴定出63种拮抗稻瘟病的植物生长促进菌，以建立对稻瘟病的环境友好型可持续管理方法。在2018年和2019年的波罗和阿曼季节。这些细菌抑制了稻瘟弧菌的生长。体外Oryzae为20.83% ~ 76.19%。这些分离的细菌经16SrDNA PCR产物测序鉴定，主要属假单胞菌属、芽孢杆菌属和沙雷菌属。在这些细菌种类中，48种细菌被发现对IAA产生阳性，63种细菌被发现对铁载体产生阳性，48种细菌被发现能够溶解不溶性磷酸盐。基于对稻瘟病菌生长抑制作用的研究。选取32个菌种，对水稻进行生长促进评价和室内、田间防治白僵菌效果评价。这些细菌种类是用滑石粉配制的，这种滑石粉在配制后至少可以存活三个月。对植物生长促进决定因素的评估表明，与未处理对照相比，本研究鉴定的所有32种细菌都能促进水稻根系和茎长的生长，并显著降低感病水稻品种的BB严重程度。

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Potential Role of Rice Plant Growth Promoting Phylloplane and Rhizospheric Bacteria in Controlling Xanthomonas oryzae pv. oryzae

Rice is an important cereal worldwide and it occupies the top position among the cereals in Bangladesh. Rice plant suffers from around 32 diseases of which ten are major in Bangladesh at present. Among the diseases, Bacterial Blight (BB) caused by X. oryzae pv. oryzae (Xoo) considered as a most destructive disease occurs in both rainfed and irrigated seasons of Bangladesh. BB causes considerable yield loss varies from 30 to 50% depending on the outbreak. It is also an important disease in most of the South and Southeast Asian countries. To develop environment-friendly sustainable management approach against BB of rice, in total sixty three plant growth promoting bacteria were identified from rice phylloplane and rhizosphere that are antagonistic to X. oryzae pv. oryzae during boro and aman seasons 2018 and 2019.These bacterial species inhibited the growth of X. oryzae pv. oryzae in vitro by 20.83 to 76.19%. These bacterial isolates were identified by sequencing of PCR products of 16SrDNA belonging to the genera mostly Pseudomonas, Bacillus and Serratia. Out of these bacterial species, 48 bacterial species were found as positive for IAA production, all 63 bacterial species were found positive for siderophore production and 48 were found capable to solubilize insoluble phosphate. Based on growth inhibition of X. oryzae pv. oryzae in in vitro, thirty two bacterial species were selected for plant growth promotion assessment and evaluation of net house and field efficacy in controlling BB of rice. These bacterial species were formulated using talcum powder which was viable for at least three months post formulation. Assessment of plant growth promoting determinants revealed that all 32 bacterial species identified in this study enhance the growth of rice plants as measured by root and shoot length and and reduced the BB severity in susceptible rice cultivar significantly as compared with untreated control.

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Integrative Advances in Rice Research [Working Title]

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