Tolerance of potentially diazotrophic bacteria to adverse environmental conditions and plant growth-promotion in sugarcane

作者：Moreira de Lima Danubia Ramos; dos Santos Isaneli Batista; Correia Oliveira Joao Tiago; Barbosa Jesimiel Gomes; da Silva Diniz Williane Patricia; Barbosa de Farias Andreza Raquel; Freire Fernando Jose^*; Sobral Julia Kuklisnky

来源：Archives for Agronomy and Soil Science, 2018, 64(11): 1534-1548.

DOI：10.1080/03650340.2018.1443212

• Biological nitrogen fixation
• plant growth-promoting bacteria
• inoculating bacteria
• salt tolerance
• pesticide tolerance

Sugarcane is one of the crops responsible for the high consumption of fertilizers in Brazil. To minimize this demand a sustainable alternative is to increase the studies to evaluate the beneficial effects of the relationship between plants/microorganisms, mainly plant growth-promoting bacteria. The objectives of this study were: a) to evaluate potentially diazotrophic bacteria isolates from sugarcane in adverse environmental conditions; b) inoculate these bacteria in sugarcane to evaluate their ability in plant growth-promotion. The study was carried in the Northeast of Brazil. Bacterial genera Burkholderia sp., Pantoea sp., Stenotrophomonas sp. and Enterobacter sp. were evaluated in different culture medium and later the bacterial isolates were inoculated in sugarcane evaluating the plant growth-promotion. Stenotrophomonas sp. and Pantoea sp. were tolerant to salinity and to different sources of carbon in acid medium and too tolerated high concentrations of pesticides and produced quorum sensing molecules (QS), but did not increase the dry matter production of sugarcane. Burkholderia sp. and Enterobacter sp. were more sensitive to salinity and pest control, but were more effective in plant growth-promotion. The tolerance of the bacteria to the adverse environmental conditions interfered negatively in the ability to plant growth-promotion.

• 出版日期2018