Physiological and morphological responses to water stress in two Acacia species from contrasting habitats

dc.contributor.authorOtieno, D.O.
dc.contributor.authorSchmidt, M.W.T.
dc.contributor.authorAdiku, S.
dc.contributor.authorTenhunen, J.
dc.date.accessioned2019-03-18T16:45:20Z
dc.date.available2019-03-18T16:45:20Z
dc.date.issued2005-03
dc.description.abstractContainer-grown seedlings of Acacia tortilis Forsk. Hayne and A. xanthophloea Benth. were watered either every other day (well watered) or every 7 days (water-stressed) for 1 year in a greenhouse. Total plant dry mass (T dm), carbon allocation and water relations were measured monthly. Differences in leaf area (LA) accounted for differences in Tdm between the species, and between well-watered and water-stressed plants. Reduction in LA as a result of water stress was attributed to reduced leaf initiation, leaf growth rate and leaf size. When subjected to prolonged water stress, Acacia xanthophloea wilted more rapidly than A. tortilis and, unlike A. tortilis, lost both leaves and branches. These differences between species were attributed to differences in the allocation of carbon between leaves and roots and in the ability to adjust osmotically. Rapid recovery in A. xanthophloea following the prolonged water-stress treatment was attributed to high cell wall elasticity. Previous exposure to water stress contributed to water-stress resistance and improved recovery after stress. © 2005 Heron Publishing - Victoria, Canada.en_US
dc.identifier.otherVolume 25, Issue 3,Pages 361–371
dc.identifier.otherhttps://doi.org/10.1093/treephys/25.3.361
dc.identifier.urihttp://ugspace.ug.edu.gh/handle/123456789/28677
dc.language.isoenen_US
dc.publisherTree Physiologyen_US
dc.subjectBiomass allocationen_US
dc.subjectCell wall elasticityen_US
dc.subjectDrought stressen_US
dc.subjectOsmotic adjustmenten_US
dc.subjectSavannaen_US
dc.subjectTranspirationen_US
dc.titlePhysiological and morphological responses to water stress in two Acacia species from contrasting habitatsen_US
dc.typeArticleen_US

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