Overexpression of the A4‑rolB gene from the pRiA4 of Rhizobium rhizogenes modulates hormones homeostasis and leads to an increase of favonoid accumulation and drought tolerance in Arabidopsis thaliana transgenic plants

Veremeichik G.N., Shkryl Yu.N., Rusapetova T.V., Silantieva S.A., Grigorchuk V.P., Velansky P.V., Brodovskaya E.V., Konnova Y.A., Khopta A.A., Bulgakov D.V., Bulgakov V.P.

В журнале Planta

Год: 2022 Том: 256 Выпуск: 1 ArticleID: 8

Clarifcation of function of the A4-rolB plast gene from pRiA4 of Rhizobium rhizogenes will allow a better understanding of the biological principles of the natural transformation process and its use as a tool for plant bioengineering. In the present study, we investigated whether the overexpression of A4-rolB gene could regulate two important processes, favonoid biosynthesis and drought tolerance. In addition, we investigated some aspects of the possible machinery of the A4-rolB-induced changes in plant physiology, such as crosstalk of the major signalling systems. Based on the data obtained in this work, it can be presumed that constitutive overexpression of A4-rolB leads to the activation of the salicylic acid signalling system. An increase in favonol accumulation and enhanced drought tolerance can be explained by the cooperative action of SA and ROS pathways.

DOI 10.1007/s00425-022-03927-x