The study of photosynthetic pigments content at some vine for table grapes under the influence of biostimulant substances application

Abstract

Assimilatory photosynthetic pigments (chlorophyll a and b) have an important role in plant growth, in the processes of photosynthesis, oxidation-reduction and fruiting, the variation of these parameters being an indicator of the growth or damage of the leaf apparatus.This study aimes to establish the influence of the application of substances with a biostimulating role on the content of chlorophyll pigments in the leaves of the vine varieties 'Paula', 'Aromat de Iaşi', and 'Chasselas doré'. The treatments were carried out with two organic vine fertilization products, applied in three concentrations 'Ecklomar'® (3.5 L/ha-V1, 4.5 L/ha-V2, 5.5 L/ha -V3) and 'Kaishi'® (2.5 L/ha-V1, 3.5 L/ha-V2, 4.5 L/ha-V3) in different growth phenophases. Following the study were identified differences between the experimental variants in carotenoid content. The highest values were observed on Paula variety with 'Ecklomar'® treatments.