e ao conteudo deproteina. Juntamente com as reservas decarboidratos, as reservas de nitrogenio desempenham importante papel na faseinicial de crescimento nas plantas lenhosas. Na videira, as reservas de nitrogeniolocalizam-se predominantemente nas raizes e na forma de aminoacidos(principalmente arginina) e proteinas. Alem disso, a absorcao de nitrogeniosuplementa a mobilizacao durante o ciclo vegetativo. Entretanto, a absorcao denitrogenio, embora inicie cedo no ciclo vegetativo, geralmente permanece baixaate a floracao, mesmo que o solo sejarico em nitrogenio. A quantidade de substancias dereserva existente durante o inverno interfere no desenvolvimento vegetativo naprimavera, no numero de cachos e flores por cacho, na fixacao do fruto e naprodutividade. A quantidade de substancias de reserva interfere tambem no vigorda brotacao. BIBLIOGRAFIABALASUBRAHMAYAM, V., EIFERT, J., and DIOFASI,L. - Studies on croppinglevel in grapes. I. Effect ofdifferential cropping level on the organic nutrient reserves in the canes. Vitis 17. 1978. BENNETT,J.; JARVIS, P.;CREASY, G.L. and TROUGHT, M.C.T. - Influence of defoliation on overwintering carbohydrate reserves, returnbloom, and yield of mature Chardonnaygrapevines. American Journal of Enology and Viticulture 2005;BERTAMINI,M. andNEDUNCHEZHIAN, N. - Photosynthetic functioning of individual grapevine leaves (Vitisvinifera L. cv. Pinot noir) during ontogeny in the field. Vitis 2003;CANDOLFI-VASCONCELOS, M.C., CANDOLFI, M.P., and KOBLET,W. - Retranslocation of carbon reserves from thewoody storage tissues into the fruitas a response to defoliation stress during the ripening period in Vitis vinifera L.. Planta 192. 1994. CASPARI,H.; LANG, A. and ALSPACH, P. - Effects of girdling and leaf removal on fruit set and vegetative growth in grape. AmericanJournal of Enology and Viticulture 1998;GRIFFON,E. - L'assimilation chlorophyllienne chez les jeunespousses des plantes. Application a lavigne.Comptes-Rendus de l'Academie des Sciences 1905;CONRADIE, W.J. - Seasonal uptake of nutrients by Chenin blanc insand culture. I. Nitrogen. South Afr JEnol Viticult 1980;CONRADIE, W.J. - Utilization of nitrogen by the grapevine as affectedby time of application and soil type.South Afr J Enol Viticult 1986;HACKETT, S.D., and HOLZAPFEL, B.P. - Factors underlying restrictedspring growth in vineyards. Australian Viticulture5: 2002.HALE,C. and WEAVER, R.J. - The effect of developmental stage on direction of translocation of photosynthate in Vitis vinifera. Hilgardia 1962;HO,L.C. - Metabolism and compartmentation of imported sugars in sink organs in relation to sink strength. Annual Reviewof Plant Physiology 1988;HOLZAPFEL, B.; SMITH, J.; ROGIERS, S. and QUIRK, L.- Management of carbohydrate reserveaccumulation as a tool for regulating vine productivity and fruit quality. Grape and Wine Research and Development Corporation. 2009.INTRIERI, C., PONI, O., SILVESTRONI, O. and FILIPPETTI, I. - Leaf age,leaf position and photosynthesis inpotted grapevines. Adv. Hort. Sci. 6. 1962.KLIEWER, W.M. - Methodsfor determining the nitrogen status of wineyards. Proceedings of the International Symposium on Nitrogen GrapeWine, Seattle, WA, 1991.KOBLET, W. - Translocation of photosynthate in vine shoots andinfluence of leaf area on quantity andquality of the grapes. Wein-Wiss 24:1969.KOBLET, W. - Translocation of photosynthate in grape vines. p45-51.In: Proc. Intern. Symp. QualityVintage, Cape Town, South Africa. 1977.KOBLET,W.; CANDOLFI-VASCONCELOS, M.C.;ZEIFEL, W. and HOWELL, G.S. - Influence of leaf removal, rootstock, and trainingsystem on yield and fruit composition ofPinot noir grapevines. American Journal of Enology and Viticulture 1994;KRIEDEMANN,P.E. - Photosynthesis in vine leaves as a function oflight intensity, temperature and leafage.Vitis 1968;KRIEDEMANN, P,