<p style="text-align: justify;">This essay studies the morphological and anatomical properties of the leaves of Garnacha tinta, Tempranillo, Chardonnay and Airén grapevines in order to discover the drought adaptation strategies present in <em>Vitis vinifera</em> L. The grapevines were grown under two water availability conditions: water limitation and non-water limitation. There was a significantly lower development of leaf area under conditions of water limitation compared to non-water limitation due to a reduction in the size of main and lateral shoot leaves, and a smaller number of leaves on lateral shoots. The development of the leaf area under water limitation conditions occurred on earlier dates than under non-water limitation conditions. Significantly lower stomatal density was observed under water limitation conditions rather than non-water limitation conditions exclusively in the Airén cultivar.</p>

The Santa Catarina State Agricultural Research and Extension Organization -Epagri SA, owns one of the largest Brazilian colletions of erva-mate (Ilex paraguariensis St.Hil.). Preliminary agronomic trials identified two promissing erva-mate materials named as Barão de Cotegipe and Água Doce. This study had the objective of characterizing genetically the existing variability in the two mentioned materials. A molecular marker technique was used to amplify the DNA, RAPD (Random Amplified Polimorfic DNA). The results showed no genetic difference between the two materials. Also, due to the genetic distance between them, the different materials from both studied origins showed genetic similarity of up to 80%.

<p style="text-align: justify;">Three-year-old grapevines of four cultivars (Garnacha tinta (Grenache noir), Tempranillo, Chardonnay and Airén) were grown on 35 L container under full irrigation and restricted irrigation conditions in order to determine the effect of water stress on carbohydrate allocation. Total grapevine dry matter was measured at pruning, fruitset, veraison and harvest. Roots, wood, shoots, leaves and clusters were dried separately. Shoots were the most affected organs by water stress, while wood was the least affected. Vines under water stress partitioned more dry matter to wood and roots to the detriment of fruits and shoots. The period from fruitset to veraison was the most active for dry matter accumulation under conditions of stress, whereas non-water stressed vines accumulated more dry matter from veraison to harvest. Under both irrigation treatments, fruits competed with roots for dry matter partitioning. Irrigation treatment and cultivar determined fruit size. Fruit size determined dry matter partitioning between organs and the dry matter accumulation pattern.</p>

RESUMO A Epagri (Empresa de Pesquisa Agropecuária e Extensão Rural de Santa Catarina S.A) possui uma das maiores coleções brasileiras de erva-mate (Ilex paraguariensisSt

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