African Journal of Biotechnology
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African Journal of Biotechnology Vol. 4 (9), pp. 968-972, September 2005
Growth
and development of date palm (Phœnix dactylifera L.) seedlings
under drought and salinity stresses
Sané
Djibril1, Ould Kneyta Mohamed1, Diouf Diaga1*,
Diouf Diégane1-2, Badiane François Abaye1, Sagna
Maurice1 and Borgel Alain3
1Laboratoire
de Biotechnologies Végétales, Département de Biologie Végétale, Faculté
des Sciences et Techniques, Université Cheikh Anta Diop, Dakar, BP 5005,
Sénégal.
2Laboratoire
commun de Microbiologie ISRA-IRD-UCAD, Route des Hydrocarbures, BP 1386
Bel Air, Dakar, Sénégal.
3IRD
Institut de Recherche pour le Développement, 911 Av.
Agropolis,
BP. 64501, F-34394 Montpellier Cedex 5, France.
*Corresponding author. E-mail:
ddiouf@ucad.sn.
Accepted 7
July 2005 |
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| Abstract | |||||
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The present investigation has been performed to evaluate date palm (Phœnix dactylifera L.) tolerance to osmotic stress induced by polyethylene glycol (PEG) or NaCl during the early stages of plant development. Two varieties Nakhla hamra (NHH) and Tijib widely cultivated in Mauritania were tested. NHH showed increasing of epicotyl length, primary root length, secondary root number and proline content when water deficit was induced by PEG. In contrast, on the basis of the same developmental and biochemical characters, the Tijib cultivar was more tolerant in salinity stress. This difference of cultivars’ behavior according the growth conditions is discussed.
Key words: Date palm, water stress, salinity stress, proline content. |
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