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Title: The effects of NaCl pre-treatments on salt tolerance of melons grown under long-term salinity
Authors: Uludağ Üniversitesi/Ziraat Fakültesi/Bahçe Bitkileri Bölümü.
Sivritepe, H. Özkan
Sivritepe, Nuray
Eriş, Atilla
Turhan, Ece
Keywords: Cucumis melo
NaCl pre-treatments
Salt tolerance
Stomatal behaviour
Ion content
Water relations
Issue Date: 1-Nov-2005
Publisher: Elsevier
Citation: Sivritepe, H. Ö. vd. (2005). "The effects of NaCl pre-treatments on salt tolerance of melons grown under long-term salinity". Scientia Horticulturae, 106(4), 568-581.
Abstract: The response of melon (Cucumis melo) plants to long-term salinity was investigated to determine the availability of the NaCl pre-treatments (seed priming + seedling conditioning) as an interesting strategy for increasing the salt tolerance. Seeds of melon cultivars "Hasanbey" and "Kirkagac" were primed with 18 dS m(-1) NaCl solution for 3 days at 20 degrees C. During emergence and seedling growth, non-primed seeds were irrigated with local irrigation water (EC: 0.3 dS m(-1)) whereas primed groups were treated with 9.0 dS m(-1) saline solution for 35 days. Seedlings derived from pre-treated (P) and non-pre-treated (NP) groups were transplanted to 8 1 pots. After transplanting, salinity treatments were started with the first irrigation. The salinity treatments consisted of five levels (control, 4.5, 9.0, 13.5 and 18.0 dS m(-1)) of irrigation solution for a period of 90 days. NaCl pre-treatments diminished the inhibiting effect of salinity on growth of melon plants. However, competence for salt adaptation varied with cultivar and the level of salinity. The physiological response of the P plants was also maintained in the long-term. Stomatal conductance and relative chlorophyll content of P plants tended to be higher than those of the NP ones. In addition, NaCl pre-treatments enhanced K and Ca concentrations of leaves and stems, and prevented toxic effects of salinity because less Na accumulated in stems. These results suggest that the use of NaCl pre-treatments could be a useful strategy to increase the salt tolerance of melon plants in the long-term and also to permit the establishment of melon crop by direct sowing in a saline medium.
ISSN: 0304-4238
Appears in Collections:Web of Science

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