Crescimento de girassol em função da inoculação de sementes com bactérias endofíticas

Abstract

INTRODUÇÃOO girassol (Hellianthus annuus L.) é cultivado em várias partes do mundo, atingindo, em 2012, a produção mundial de 37 milhões de toneladas, em área de, aproximadamente, 25 milhões de hectares (Factfish 2013). ABSTRACT RESUMOA importância da cultura do girassol, no mundo, deve-se ao óleo de excelente qualidade que se extrai de suas sementes e aos grãos in natura que são consumidos na alimentação humana, de diversas formas. Além disto, o girassol pode ser utilizado para outras finalidades, como a produção de flores ornamentais, farelo para a alimentação de animais, forragem e si-1. Trabalho recebido em maio/2013 e aceito para publicação em maio/2014 (nº registro: PAT 24430).

The Microbial Community Structure in the Rhizosphere of Theobroma cacao L. and Euterpe oleracea Mart. Is Influenced by Agriculture System in the Brazilian Amazon

“…Among these identified PGPR, two belonged to the genus Bacillus [ 19 ]. Another study also revealed that the effects of inoculating endophytic bacteria belonging to the genus Bacillus , isolated from cocoa trees, in sunflower plants can enhance the plants’ ability to make osmotic adjustments under water stress, resulting in a higher accumulation of organic solutes compared to non-inoculated plants [ 93 ]. Several studies have already confirmed the successful use of rhizobacteria in cocoa plants [ 24 ] and in palms such as oil palm [ 94 ], coconut [ 95 ], and açai seedlings [ 19 , 23 ].…”

Benefits Associated with the Interaction of Endophytic Bacteria and Plants

“…The host plant provides niches of protection to the microorganisms which, in turn, produce metabolites that increase the absorption of nutrients, affecting the plant growth and biomass gain. Metabolites compounds induce a resistance process of the plant to pathogens, reducing its exposure to pathogenic infections and acting as disease controllers ( 4,10 ). The interaction between the host plants and the endophytic community involves a process of co-evolution governed by colonization, which is influenced by genotype, growth stage, physiological status, type of plant tissue, agricultural practices, and environmental conditions such as temperature, water supply, and nutrients ( 11 ).…”

“…The endophytic bacteria act directly on the development and growth of plants by biological nitrogen fixation, acceleration of digestion, phosphorus solubilization, and production of phytohormones, which confer resistance to biotic factors. From the indirect stimulation, endophytes promote the improving of availability and absorption of nutrients, minerals and water; induce the tolerance of the host to stress caused by abiotic factors, including osmotic stress, exposure to heavy metals and xenobiotic molecules; assist in the suppression of harmful microorganisms; and act in the biological control of plant pathogens ( 4,10,15 ). The interaction between plants and beneficial bacteria can have a profound effect on plant health, growth, development, production and on soil quality ( 16 ).…”

Resistance to water deficit during the formation of sugarcane seedlings mediated by interaction with Bacillus sp.

“…In this aspect, the use of diverse tools for the conviviality of plants cultivated commercially with water deficit has been studied, among them microorganisms. Studies show the viability of this biological tool in several agricultural crops, such as Helianthus annuus (Santos et al, 2014), Zea mays (Kavamura et al, 2013, Amada et al, 2015 and sugarcane (Schultz et al, 2012).…”