Biogenic Rhamnolipid Surfactants in Complex Plant Growth Regulators
DOI:
https://doi.org/10.20535/1810-0546.2016.3.65576Keywords:
Rhamnolipid surfactants, Coleoptile, Hypocotyl, Cytokinin, Gibberellic acid, AuxinAbstract
Background. The topical problem of biotechnology is the creation of ecologically safe agents for the crop production. Considering the environmental threat of synthetic agents, biological products are priority ones for plants. Among them biogenic surfactants deserve attention due to their physico-chemical and biological properties.
Objective. Influence of surface-active products of microbial synthesis of the strain Pseudomonas sp. PS-17 (rhamnolipid biosurfactants) on the activity of phytohormones for the creation of complex plant growth regulators.
Methods. The effect of culture liquid supernatant (CLS) and rhamnolipid biocomplex (RBC) on phytohormone activity was determined in bioassays for auxin, cytokinins, gibberellins.
Results. It was shown that in the compositions with RBC the activity of phytohormones has increased: auxins – indolyl-3-acetic acid on 28 %, indolyl-3-butyric acid – 63 %; gibberellin – on 30 %, cytokinin – on 24–30 % compared to the options without biosurfactants. Such stimulating effect on phytohormones was also determined for CLS, in addition it manifested phytohormone-like action.
Conclusions. The obtained results prove the prospects of rhamnolipid surfactants for the creation of ecologically safe complex plant growth regulators.
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