Journal of Food, Agriculture and Environment




Growth, water relation and physiological responses of drought stressed Irhaba tomato landrace as compared with Amani and GS-12 cultivars


Author(s):

Emad Y. Bsoul 1*, Ala’ F. Al-Afaeshat 1, Muien Qaryouti 2

Recieved Date: 2015-10-13, Accepted Date: 2015-12-30

Abstract:

Three tomato (Solanum lycopersicum L.) lines, namely Irhaba landrace and two commercial cultivars Amani and GS-12, were evaluated under drought stress. Plants from the three lines were subjected to three irrigation treatments (100%, 75% and 55% of the field capacity (FC)). The reduction in root dry weight was less sensitive to drought stress compared to shoot dry weight. Stomatal conductance and transpiration rate of the three plant sources decreased with time up to 28 days from drought treatment regardless of the severity of the drought stress. However, after 42 and 56 days stomatal conductance increased. As compared with the other two cultivars, Irhaba landrace, developed mechanisms that allowed this landrace to keep high stomatal conductance, transpiration rate, net assimilation rate, and the highest relative growth rate. The adaptation mechanisms of Irhaba landrace under drought stress propose it as promising source for plant breeding programs.

Keywords:

Tomato, Solanum lycopersicum, water relations, leaf gas exchange, chlorophyll, relative growth rate, transpiration, net assimilation rate, specific stem length


Journal: Journal of Food, Agriculture and Environment
Year: 2016
Volume: 14
Issue: 1
Category: Agriculture
Pages: 78-84


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