Effect of phytohormones synthesized by rhizosphere bacteria on plants

New strains of rhizosphere microorganisms Azotobacter chroococcum Az d10, Bacillus megaterium Pl-04, and Bacillus mucilaginosus B-1574 were found to be able to synthesize cytokinins (CKs) and indolylacetic acid (IAA). Three forms of CKs—dihydrozeatin riboside, isopentenyl adenosine, and trans -zeati...

Full description

Saved in:
Bibliographic Details
Published inApplied biochemistry and microbiology Vol. 47; no. 3; pp. 274 - 278
Main Authors Sokolova, M. G., Akimova, G. P., Vaishlya, O. B.
Format Journal Article
LanguageEnglish
Published Dordrecht SP MAIK Nauka/Interperiodica 01.05.2011
Springer Nature B.V
Subjects
Bacteria
Biochemistry
Biomedical and Life Sciences
Life Sciences
Medical Microbiology
Microbiology
Microorganisms
Plant biology
Plant nutrition
Rhizosphere
Seed germination
Soil microorganisms
Cucumber Plant
Rhizosphere Bacterium
Deltamethrin
Apply Biochemistry
Trans Zeatin
Online AccessGet full text

Cover

More Information
Summary:New strains of rhizosphere microorganisms Azotobacter chroococcum Az d10, Bacillus megaterium Pl-04, and Bacillus mucilaginosus B-1574 were found to be able to synthesize cytokinins (CKs) and indolylacetic acid (IAA). Three forms of CKs—dihydrozeatin riboside, isopentenyl adenosine, and trans -zeatin riboside—were identified, whose ratio was different in the three bacterial cultures. Inoculation of cucumber ( Cucumis sativus L.) plants increased the content of CKs and IAA in them by 35.6 and 21.3%, respectively, and also stimulated seed germination and increased the growth rate, the biomass of shoots, the number of lateral roots, and the root hair area, which ensured better plant nutrition. The IAA/CKs ratio shifted during bacterization towards CKs due to increase in the content of riboside forms, which apparently caused growth stimulation.
ISSN:0003-6838
1608-3024
DOI:10.1134/S0003683811030148