Volume 7, Number 1, p.p. 21-24
Export of organic compounds from clusters to other organs of the grapevine
L. Beriashvili,1,* M. Tetradze1 and T. Beriashvili2
1 Department of Bioorganic Chemistry, Javakhishvili State University, 1 Chavchavadze Ave, 0128 Tbilisi, Georgia
2 Durmishidze Institute of Biochemistry and Biotechnology, Georgian Academy of Sciences, David Agmashenebeli Allee, 10 km, 0159 Tbilisi, Georgia
Ripening clusters of the Rkatsiteli grapevine (Vitis venifera L.) were placed in an environment of 14CO2 during periods of berry growth and [1,6-14C] glucose was injected directly into the berries. It was found that compounds containing 14CO2 and [1,6-14C] glucose were actively exported to other organs of the grapevine in both descending and ascending directions. 14C compounds from the grapevine cluster are exported to other organs mainly as sugars (primarily as glucose and sucrose). Organic compounds are exported from the cluster to the shoot through the cortex as well as through the wood. It is concluded that the cluster actively takes part in the metabolism of the whole plant
Keywords:
grapevine cluster botryology, leaf, shoot, 14CO2, [1,6-C14] glucose