Panichikkal Jishma, Puthiyattil Neethu, Raveendran Aswani, Nair Remakanthan Appukuttan, Krishnankutty Radhakrishnan E
Mahatma Gandhi University, Kottayam, Kerala, India.
Department of Botany, University College, Thiruvananthapuram, Kerala, India.
Curr Microbiol. 2021 Mar;78(3):911-919. doi: 10.1007/s00284-021-02361-8. Epub 2021 Feb 12.
Rhizosphere encourages the survival and functioning of diverse microbial communities through the influence of plant roots. Likewise, the rhizobacterial functioning contribute to the growth and productivity of crop plants significantly. With the advancement of nanotechnology, the nanoparticles can expect to augment the performance of plant beneficial microorganisms including the rhizobacteria and hence have the promise to boost sustainable agricultural practices. In the present study, Bacillus licheniformis encapsulated in alginate-chitosan nanoparticles (CNPs) beads supplemented with rice starch (RS) has been evaluated for its plant growth enhancement and disease control properties. The encapsulated Bacillus licheniformis was initially characterized for indole-3-acetic acid (IAA) production, nitrogen fixing capacity, 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase production and antifungal activity against Sclerotium rolfsii. In addition to this, the plant growth promoting and biocontrol properties of the encapsulated Bacillus licheniformis were also evaluated using Capsicum annuum (L.) (chilli) seedlings. From the results, the plants treated with encapsulated Bacillus licheniformis supplemented with CNPs were found to have maximum growth enhancement. At the same time, plants treated with encapsulated Bacillus licheniformis supplemented with CNPs and RS were found to have enhanced disease suppression. This revealed the application of encapsulated Bacillus licheniformis supplemented with CNPs and RS as a promising delivery system for agricultural applications.
根际通过植物根系的影响促进了多种微生物群落的存活和功能。同样，根际细菌的功能对农作物的生长和生产力有显著贡献。随着纳米技术的发展，纳米颗粒有望增强包括根际细菌在内的植物有益微生物的性能，因此有望推动可持续农业实践。在本研究中，对包裹在藻酸盐-壳聚糖纳米颗粒（CNPs）珠粒中并添加了大米淀粉（RS）的地衣芽孢杆菌进行了植物生长促进和病害防治特性评估。最初对包裹的地衣芽孢杆菌进行了吲哚-3-乙酸（IAA）产生、固氮能力、1-氨基环丙烷-1-羧酸（ACC）脱氨酶产生以及对罗氏白绢病菌的抗真菌活性的表征。除此之外，还使用辣椒（L.）（辣椒）幼苗评估了包裹的地衣芽孢杆菌的植物生长促进和生物防治特性。从结果来看，用添加了CNPs的包裹地衣芽孢杆菌处理的植物生长增强最为显著。同时，用添加了CNPs和RS的包裹地衣芽孢杆菌处理的植物病害抑制能力增强。这表明添加了CNPs和RS的包裹地衣芽孢杆菌作为一种有前景的农业应用递送系统。
