Nursery vegetative growth of 'Aromat de Iaşi' and 'Golia' grape varieties, by analysis of foliary photosynthetic pigments

Abstract

The physiological role of the assimilating pigments is complex, being involved in the processes of oxidation-reduction, in the photosynthesis and protection processes against ultraviolet radiation. The study aims to track vegetative growth during the vegetation period by spectrophotometrically determining the content of chlorophylls (a and b) and carotenoids from the leaves of vine varieties (Vitisvinifera L.) for wine grapes Aromat de Iaşi and Golia, new varieties created within the Research and Development Station for Viticulture and Winemaking Iasi. The two varieties were grafted on three rootstocks (RipariaGloire, Berlandieri x Riparia Selection Oppenheim 4-clone 4 and Berlandieri x Riparia Selection Crăciunel 2), thus creating six working variants. Following the completion of the observations, Golia/SO4-4variant recorded the best results in terms of vegetative growth in the vegetation period measuring 41.83 cm (before wood maturation)followed very close by Aromatde Iasi/RipariaGloire, which recorded 41,71 cm at the last measurement. Regarding the determination of the content of photosynthetic pigments (chlorophyll a and b, respectively carotenoids), the best results were obtained in the Aromat de Iaşi variety on almost all variants. Golia grape variety registered smallervalues.