1. High spatial heterogeneity of water stress levels in Refošk grapevines cultivated in Classical KarstFrancesco Petruzzellis, Sara Natale, Luca Bariviera, Alberto Calderan, Alenka Mihelčič, Jan Reščič, Paolo Sivilotti, Katja Šuklje, Klemen Lisjak, Andreja Vanzo, Andrea Nardini, 2022, original scientific article Keywords: Classical Karst, water status, drought stress, grape quality, phenolic profile, vitis vinifera
Published in RUNG: 11.11.2021; Views: 3988; Downloads: 0
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2. Combined effects of early season leaf removal and climatic conditions on aroma precursors in ‘Sauvignon blanc’ grapesPaolo Sivilotti, Rachele FALCHI, Jose Carlos Herrera, Branka Škvarč, Lorena Butinar, Melita Sternad Lemut, Marijan Bubola, Paolo SABBATINI, Klemen Lisjak, Andreja Vanzo, 2017, original scientific article Abstract: Early leaf removal around the cluster zone is a common technique applied in cool climate viticulture, to regulate yield components and improve fruit quality. Despite the increasing amount of information on early leaf removal and its impact on total soluble solids, anthocyanins and polyphenols, less is known regarding aroma compounds. In order to verify the hypothesis that defoliation, applied before or after flowering, could impact the biosynthesis of thiol precursors, we performed a two year (2013 and 2014) experiment on Sauvignon blanc. We provided evidence that differential accumulation of thiols precursors in berries is affected by the timing of defoliation and this impact was related to modifications in biosynthetic pathway. Furthermore, the possible interaction between leaf removal treatment and seasonal weather conditions, and its effect on the biosynthesis of volatile precursors are discussed. Our results suggested that in Sauvignon blanc the relative proportion of 4-S-glutathionyl-4-methylpentan-2-one (G-4MSP) and 3-S-glutathionylhexan-1-ol (G-3SH) precursors can be affected by defoliation, and this could be related to the induction of two specific genes encoding glutathione-S-transferases (VvGST3 and VvGST5), while no significant effects on basic fruit chemical parameters, polyphenols and methoxypyrazines were ascertained under our experimental conditions.
Keywords: early leaf removal, cluster exposure, thiol precursors, methoxypyrazines, glutathione S-transferase, Vitis vinifera
Published in RUNG: 31.08.2017; Views: 5754; Downloads: 0
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6. Canopy microclimate manipulation in the sustainable management of 'Pinot Noir' vineyard from Vipava valley : dissertationMelita Sternad Lemut, 2014, doctoral dissertation Keywords: Modri pinot, manipulacija mikroklime, grm vinske trte, odstranjevanje listov, profiliranje metabolitov, metabolomika, sekundarni metaboliti, polifenoli, izoprenoidi, mikrobna ekologija, fungicidi, trajnostno vinogradništvo, Vipavska dolina, disertacije
Published in RUNG: 25.04.2014; Views: 8113; Downloads: 159
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