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2009 | 31 | 4 |
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Differences in abscisic acid concentration in roots and leaves of two young Olive (Olea europaea L.) cultivars in response to water deficit

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Differences in abscisic acid (ABA) accumulation between two olive cultivars were studied by enzymelinked immunosorbent assay in roots and leaves, leaf water potential (Ψ₁), stomatal conductance (gs) as well as photosynthetic rate (A) were also determined in well-watered (WW) and water-stressed (WS) plants of two olive cultivars ‘Chemlali’ and ‘Chetoui’. ‘Chemlali’ was able to maintain higher leaf CO₂ assimilation rate and leaf stomatal conductance throughout the drought cycle when compared with ‘Chetoui’. Furthermore, leaf water potential of ‘Chemlali’ decreased in lower extent than in Chetoui in response to water deficit. Interestingly, significant differences in water-stress-induced ABA accumulation were observed between the two olive cultivars and reflect the degree of stress experienced. Chemlali, a drought tolerant cultivar, accumulated lower levels of ABA in their leaves to regulate stomatal control in response to water stress compared to the drought sensitive olive cultivar ‘Chetoui’ which accumulated ABA in large amount.
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  • Laboratorie Caracterisation et Qualite de l'Huile d'Olive, Centre de Biotechnologie de Borj Cedria, B.P. 901, 2050 Hammam-Lif, Tunisia
  • Laboratory of Plant Production, Department of Farm Organization and Enterprise, Management, University of Ioannina, G. Seferi 2, 30100 Agrinio, Greece
  • Laboratory of Plant Production, Department of Farm Organization and Enterprise, Management, University of Ioannina, G. Seferi 2, 30100 Agrinio, Greece
  • Institut de l'Olivier, B.P. 40, 4061 Sousse, Tunisia
  • Laboratorie Caracterisation et Qualite de l'Huile d'Olive, Centre de Biotechnologie de Borj Cedria, B.P. 901, 2050 Hammam-Lif, Tunisia
  • Laboratory of Plant Production, Department of Farm Organization and Enterprise, Management, University of Ioannina, G. Seferi 2, 30100 Agrinio, Greece
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