Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.14/17466
Título: Estudos anatómicos e histológicos em folhas de roseira desenvolvidas em diferentes condições de humidade relativa
Autor: Monteiro, A.
Carvalho, D. R. A
Vasconcelos, Marta
Correia, C.
Moutinho-Pereira, J. M.
Gonçalves, B.
Bacelar, E.
Carvalho, S. M. P.
Palavras-chave: Upostharvest qality
Rosa × hybrid
Stomata
Thinnest protective
Data: 2014
Citação: MONTEIRO, A… [et al.] - Estudos anatómicos e histológicos em folhas de roseira desenvolvidas em diferentes condições de humidade relativa. In Jornadas Ibéricas de Horticultura Ornamental, VI, Valencia, Spain, 1‐3 Octubre 2014. ROCA FERRERFÁBREGA, Dolors …[et al.] (ed.) - Las Buenas Prácticas en la Horticultura Ornamental: Actas de Horticultura, nº 68. 2014. ISBN 978-84-617-3020-9. Cap. 3, p. 144-149
Resumo: High relative air humidity (RH > 85%) during growth has a negative impact on postharvest longevity of cut roses, being described a different susceptibility among cultivars. In this study, we evaluated the effect of RH on leaf anatomical and histological characteristics in six genotypes from a cut rose segregating tetraploid population (four sensitive and two with intermediate response to desiccation) grown at moderate (60%) or high (90%) RH. Leaves developed at high RH showed larger specific leaf area (increasing 12.8% and 26.8% on the sensitive and intermediate genotypes, respectively) and lower succulence (reducing 9.5% on the sensitive and 10.7% on the intermediate genotypes). Moreover, these leaves also showed a reduced thickness of the total lamina, cuticle and the upper and lower epidermis. Stomatal density was also reduced but stomatal dimensions were significantly larger at high RH. It is concluded that RH plays a very important role on the modification of leaf structure.
Peer review: yes
URI: http://hdl.handle.net/10400.14/17466
Aparece nas colecções:CBQF - Artigos em actas / Papers in proceedings

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