Morphometric parameters and and the phenolic compounds content in sunflower lines and hybrids under broomrape infection

Abstract

The aim and tasks of the study.This paper describes the studies results of the broomrape impact on growth processes and the phenolic compounds content in sunflower lines and hybrids during infection.

Materials and methods. Lines and hybrids of YurievPlant Production Institute of NAAS were used as material for investigation. The foreign hybrid PR64A71 was used as a resistant standard sample, line Cx 908 A – as a susceptible one.

Results and discussion. It was determinated, that morphometric parameters of sunflower plants with broomrape inoculation were lower than in control samples. It was found that the phenolic compounds content increased in broomrape resistant genotypes, whereas in susceptible ones it decreasedunder broomrape inoculation of studied sunflower lines and hybrids.

Generalphenolic content in leaves of line-standard resistant to parasite, as well as in the studied lines and hybrids generally hardly changes in comparison with the control plants, or slightly increases during broomrape infection. Whereas general phenolic content in the roots increases in several times afterbroomrape inoculation. At the same time the phenolic compounds level in the roots and the leaves ofsusceptible line-standard plantsdecreased after broomrape inoculation

Conclusions. Research results allow to conclude that broomrape significantly affect growth processes sunflower inhibiting them. The findings also show an important role of phenols in the sunflower resistance formation to broomrape