Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/7401
Título: Different water regimes effects on photoprotection strategies of three species from montado understorey: a pot experiment
Autor: Bicho, Maria Catarina Gomes Pedro
Orientador: Pintó-Marijuan, Marta
Correia, Alexandra Cristina Pires
Palavras-chave: montado understorey
water stress
ascorbate
chloroplastic pigments
climate change
Data de Defesa: 2014
Editora: ISA/UL
Citação: Bicho, M.C.G.P. - Different water regimes effects on photoprotection strategies of three species from montado understorey: a pot experiment. Lisboa: ISA, 2014, 80 p.
Resumo: The aim of the present thesis is to assess the influences of different watering regimes on some ecophysiological traits on Lolium multiflorum, Trifolium incarnatum and Ornithopus sativus growing in monoculture or together in a mixture.The resulting data will allow better understanding of montado species responses to future climate change precipitation conditions. Plants were grown in pots in monoculture (three monocultures) and one mixture of the three species, under two different watering regimes: low watering frequency (LWF) and high watering frequency (HWF) corresponded to watering each four-six or two-three days, respectively, depending on the daily evapotranspiration demand. The responses to water stress in leaves were assessed by quantifying the content of chloroplastic pigments (chlorophylls and carotenoids) and the oxidation state (by measurements of ascorbate and dehydroascorbate). Prior to irrigation, all three species were more stressed as compared to after irrigation. LWF was always more damaged showing significant differences between watering treatments and indicating that future Mediterranean conditions will be more oxidative for the montado species. There were no pronounced differences between monoculture and mixture
Descrição: Mestrado em Engenharia Agronómica - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/7401
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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