Shoot growth of Merlot and Cabernet Sauvignon grapevine varieties

Abstract

-The objective of this work was to evaluate shoot growth of the grapevine varieties Merlot and Cabernet Sauvignon, during 2006, and Cabernet Sauvignon, during 2008 were assessed from grape development (1/13/2009) (pea-sized grapes) until shoot vegetative growth had ceased. Budburst occurred in the second half of September, and shoot-growth cessation occurred during ripening. Higher growth rates (about 4 cm per day) were observed in pre-and post-flowering, followed by reduction due to the competition for photosynthates for the formation of flowers and bunches. Temperature and photoperiod induce grapevine shoots to cease growth in the highland regions of Santa Catarina State, Brazil.Index terms: Vitis vinifera, photoperiod, temperature, vegetative growth. , avaliou-se a fenologia e o crescimento dos ramos para 'Cabernet Sauvignon' a partir do desenvolvimento das bagas (13/1/2009) (bagas em tamanho de ervilha) até todos os ramos não apresentarem crescimento vegetativo. A brotação iniciou-se na segunda quinzena de setembro, e a paralisação do crescimento dos ramos ocorreu durante o período de maturação. Maiores taxas de crescimento (cerca de 4 cm por dia) foram observadas em pré e pós-floração, seguidas de redução em virtude da competição por fotoassimilados para a formação de flores e cachos. A temperatura e o fotoperíodo induzem a paralisação de crescimento dos ramos nas regiões de altitude de Santa Catarina. Crescimento de ramos das variedades de videira Merlot e Cabernet SauvignonTermos para indexação: Vitis vinifera, fotoperíodo, temperatura, crescimento vegetativo.

Examining the relationship between the Enhanced Vegetation Index and grapevine phenology

“…In our study, the grapevine growth profile differs in each year, with different peak greenness and growth rates. Maximum growth rate was consistent with the FLO stage, with growth reductions starting around VER, which is supported by previous research [Borghezan et al, 2012;Scarpare et al, 2012]. Altogether, the outcomes suggest that a slow-steady growth rate throughout the growing season can lead to longer phenological intervals, while rapid growth peaks tend to shorten the interphase.…”

Effect of shoot topping intensity on 'Cabernet Franc' grapevine maturity in high-altitude region

“…The shoot topping treatments were performed at veraison, which occurred in the first week of February in both cycles, during the phenological stage of berry color change. This stage coincides with the time when the shoot growth rate decreases (Borghezan et al, 2012). The experiment was arranged in a randomized complete block design, with four treatments, four replicates and ten plants per plot.…”

Physiological and agronomical responses of Syrah grapevine under protected cultivation

“…The main shoot growth rate and pruning weight also increased under plastic covered probably due, mainly, to the highest minimum air temperature (Table 1) as compared to uncovered treatments (Figures 1a,d). The shoot growth is highly dependent on air temperature, being linearly related to thermal time for all stages of leaf development from budbreak to veraison (Borghezan et al, 2012;Lebon et al, 2004). Furthermore, the high night temperature may have increased the respiration activity providing more energy and carbon skeleton for shoot growth of covered grapevine (Hendrickson et al, 2004).…”