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Advisor(s)
Abstract(s)
This study compare leaf morphoanatomical characteristics of four red cultivars - ‘Touriga
Nacional’, ‘Trindadeira’, ‘Cabernet Sauvignon’ and ‘Syrah’ -, grown side by side at the same terroir. The
analyzed leaf traits, under light and scanning electron microscopy, showed large variability among genotypes.
‘Trincadeira’ has the biggest single leaf area and ‘Cabernet Sauvignon’ the smallest one. ‘Touriga Nacional’
showed the lowest leaf dry weight and ‘Trincadeira’ the highest one, nonetheless there was no significantly
differences in leaf dry mass per area and in leaf density. Leaf dry mass per area was positively correlated with
leaf density but showed no correlation with leaf thickness. The French genotypes presented higher thickness of
the leaf anatomical traits than the two Portuguese ones. ‘Trincadeira’ showed significantly highest stomata
density while the other cultivars showed no significant differences among them. The analyses of the three types
of stomata revealed that ‘Trincadeira’ has the lower percentage of raised above and the highest percentage of
sunken stomata while ‘Cabernet Sauvignon’ showed the opposite behaviour. The hairs on the lower surface
presented a similar woolly aspect in all cultivars. The possible role of leaf morphoanatomical characteristics in
determining the cultivars adaptation to abiotic stresses is suggested and discussed
Description
XII Congreso Internacional Terroir
Keywords
grapevine cultivars leaf morphoanatomy terroir
Pedagogical Context
Citation
E3S Web of Conferences 50, 01038 (2018)
Publisher
EDP Sciences