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Comparison of biomass production-based drought tolerance indices of pistachio (Pistacia vera L.) seedlings in drought stress conditions

Research Paper | August 1, 2015

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Ali Esmaeilpour, Marie-Christine Van Labeke, Roeland Samson, Siamak Ghaffaripour, Patrick Van Damme

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Int. J. Agron. Agri. Res.7( 2), 36-44, August 2015


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Pistachio (Pistacia vera L.)has a high tolerance to soil drought and salinity.Especially adult trees are well-known for drought resistance. We carried out a greenhouse experiment to evaluate the effects of two drought stress levels (Ψs= -0.75 MPa, Ψs= -1.5 MPa) and subsequent recovery on relative chlorophyll content and biomass production in three Iranian pistachio cultivars i.e. Akbari, Kaleghochi and Ohadi. Both drought stress levels lowered leaf relative chlorophyll content and total plant dry weight. Ohadi had significantly higher rates of relative chlorophyll and plant dry weights (biomass) under drought stress conditions compared to Akbari, whereas Kaleghochi showed intermediate results.Six drought tolerance indices including stress susceptibility index (SSI), stress intensity (SI), stress tolerance index (STI), stress tolerance (TOL), mean productivity (MP) and geometric mean productivity (GMP) were calculated from total plant dry weight (biomass) under severe drought and non-stressed (control) conditions.Our results show a significant relationship between both absolute plant biomass and plant biomass reduction (TOL) with STI, MP and GMPfor pistachio cultivars. Tolerance indices including STI identified cultivars which produce high plant biomass in both favorable and unfavorable moisture conditions.These results demonstrate that Ohadi may be more tolerant to drought in terms of biomass productivity as it performs better than other cultivars.


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Comparison of biomass production-based drought tolerance indices of pistachio (Pistacia vera L.) seedlings in drought stress conditions

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