Effects of Salinity on Growth, Water Relations and Photosynthetic Rate of Tomatoes Grown in Nutrient Film Technique

Ismail, Mohd Razi and Burrage, S. W. (1994) Effects of Salinity on Growth, Water Relations and Photosynthetic Rate of Tomatoes Grown in Nutrient Film Technique. Pertanika Journal of Tropical Agricultural Science, 17 (2). pp. 73-79. ISSN 0126-6128

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Abstract

Tomato (Lycopersicon esculentum Mill. var Counter) plants were grown under different salinity conditions using the Nutrient Film Technique (NFT). In the first experiment, plants were exposed to salinities of 2.5 , 5.5 and 8.5 mS cm-l . In the second experiment, plants were exposed to continuous salinity of 2.5 and 8.5 mS cm-l and altered salinity i. e low to high or vice versa. Leaf and stem dry weight were markedly reduced when plants were exposed to continuous salinity of 8.5 mS cm-l. Exposure to high salinity at the later stages of growth also resulted in the reduction of leaf dry weight to a level similar to that of plants exposed to continuous high salinity. This could be attributed to the restriction in the movement of water within the plants as indicated by the reduction in plant water uptake and leaf water potential. Photosynthetic rate was not affected although stomatal conductance and leaf water potential were reduced when plants were exposed to high salinity.

Item Type:Article
Keyword:Salinity, growth, water relations, photosynthetic rate, tomatoes, Nutrient Film Technique
Publisher:Universiti Putra Malaysia Press
ID Code:3233
Deposited By: Nasirah Abu Samah
Deposited On:24 Nov 2009 08:25
Last Modified:27 May 2013 07:06

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