Interaction of <Emphasis Type="Italic">Azospirillum brasilense</Emphasis> and <Emphasis Type="Italic">Glomus intrarradix</Emphasis> in Sugar Cane Roots |
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Authors: | Carlos H Bellone Carrizo de Bellone Silvia |
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Institution: | 1.Facultad de Agronomía y Zootecnia,Universidad Nacional de Tucumán,Tucumán,Argentina |
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Abstract: | Fifteen-day-old variety NA 56-79 sugar cane seedlings were inoculated with Azospirillum brasilense and Glomus intrarradix. This article aims at examining changes in sugar cane root seedlings inoculated with Glomus intrarradix and Azospirillum brasilense, the increase in microbial biomass and the acetylene reduction process as well. The internal root colonization was studied
20 days after inoculation using scanning and a transmission electron microscope. Both microorganisms entered the sugar cane
root through the emergent lateral roots. The microorganisms were capable of coexisting both intra and intercellularly, producing
changes in the cell wall, thus allowing colonization and interaction between the organisms. These changes increased the number
of microorganisms inside the root as well as acetylene nitrogen reduction. Sugar cane plant biomass increased with joint-inoculation.
The number of endophytic microorganisms and nitrogen fixing activity increased when they were colonized by Azospirillum and Glomus together. |
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Keywords: | Acetylene reduction Azospirillum brasilense Glomus intrarradix Microbial biomass |
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