Infection of Plants and Plant Tissue Cultures with Cyanobacteria–Bacteria Complexes
Tóm tắt
The infection of tobacco, nightshade, rice plants, and their tissue cultures with the cyanobacteria–bacteria associative microsymbiont complexes (AMC) isolated from natural syncyanoses (the ferns Azolla pinnataand Azollasp. and the cycad Encephalartos ferox) was studied. The inoculation of the intact plants or their cuttings with AMC led to the colonization of the plant roots, stems, and leaves by cyanobacteria and their bacterial symbionts (referred to as satellite bacteria, SB). The sites of the long-term contact of plant organs with cyanobacteria were characterized by the formation of copious slime. On the roots of infected plants, one could observe the callus growth of cortical parenchyma cells and the formation of pseudonodules, in which SB cells gradually accumulated. In mixed cultures of plant callus tissues and the AMC isolated from the fernsA. pinnataand Azollasp., the callus tissue specifically influenced the growth of the AMC components, causing (depending on the plant species and strain) either their balanced growth, or their cyclic growth, or the predominant growth of one of the AMC components (either cyanobacteria or satellite bacteria). This phenomenon is proposed to be used for the dissociation of stable multicomponent natural symbiotic complexes and the selection of their particular components.
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