Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during Acclimation
Among the different species of Pistacia genus, P. atlantica is more distributed in cold area than P. khinjuk. In this study, in order to illustrate the physiological mechanisms of cold tolerance under acclimation phenomenon, two experiments were established. First experiment was conducted to inducti...
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Iranian Society of Forestry
2019-08-01
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doaj-a9b00597706e4585a92250bbf2e85dfb2021-06-26T06:50:11ZfasIranian Society of Forestryمجله جنگل ایران2008-61132423-44352019-08-0111220721993393Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during AcclimationSomayeh Homayoonfar0R. Zolfaghari1Payam Fayyaz2M.Sc., Dept. of Forestry, Faculty of Agriculture & Natural Resources, University of Yasouj, Yasouj, I. R. IranAssociate Prof., Dept. of Forestry, Faculty of Agriculture & Natural Resources, University of Yasouj, Yasouj, I. R. IranAssociate Prof., Dept. of Forestry, Faculty of Agriculture & Natural Resources, University of Yasouj, Yasouj, I. R. IranAmong the different species of Pistacia genus, P. atlantica is more distributed in cold area than P. khinjuk. In this study, in order to illustrate the physiological mechanisms of cold tolerance under acclimation phenomenon, two experiments were established. First experiment was conducted to induction of acclimation on seedlings at two stages and each stage was done for two weeks with different photoperiods. Then chlorophyll and florescence's chlorophyll was measured. For second experiment, leaves and stems of seedlings were exposed to three levels of temperature, +4°C (control), -20°C in one hour and -20°C in two hours. For this purpose, we measure relative water content (RWC) and electrolyte leakage (EL). Results of first experiment showed that 44% electron transport rate and 46% photochemical quenching was significantly reduced. This reduction in P. atlantica was grater by 30% compared to P. khinjuk. Second experiment results revealed that leaf RWC and EL increased during cold acclimation to be 8 and 11%, respectively. In addition, stem EL increased only in P. khinjuk (44%). In fact, P. atlantica due to decreasing of RWC during acclimation was able to maintain the photosystem efficiency and showed more resistance to cold stress. According to our findings, we can identify cold-resistant species or genotypes by measuring the florescence's chlorophyll.http://www.ijf-isaforestry.ir/article_93393_b46513d83b8d1ec4035f1f5f078fc20c.pdfchlorophyll fluorescenceelectrolyte leakagehardeningzagros |
collection |
DOAJ |
language |
fas |
format |
Article |
sources |
DOAJ |
author |
Somayeh Homayoonfar R. Zolfaghari Payam Fayyaz |
spellingShingle |
Somayeh Homayoonfar R. Zolfaghari Payam Fayyaz Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during Acclimation مجله جنگل ایران chlorophyll fluorescence electrolyte leakage hardening zagros |
author_facet |
Somayeh Homayoonfar R. Zolfaghari Payam Fayyaz |
author_sort |
Somayeh Homayoonfar |
title |
Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during Acclimation |
title_short |
Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during Acclimation |
title_full |
Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during Acclimation |
title_fullStr |
Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during Acclimation |
title_full_unstemmed |
Effect of Cold Stress on Physiological Traits of Pistacia atlantica and P. khinjuk during Acclimation |
title_sort |
effect of cold stress on physiological traits of pistacia atlantica and p. khinjuk during acclimation |
publisher |
Iranian Society of Forestry |
series |
مجله جنگل ایران |
issn |
2008-6113 2423-4435 |
publishDate |
2019-08-01 |
description |
Among the different species of Pistacia genus, P. atlantica is more distributed in cold area than P. khinjuk. In this study, in order to illustrate the physiological mechanisms of cold tolerance under acclimation phenomenon, two experiments were established. First experiment was conducted to induction of acclimation on seedlings at two stages and each stage was done for two weeks with different photoperiods. Then chlorophyll and florescence's chlorophyll was measured. For second experiment, leaves and stems of seedlings were exposed to three levels of temperature, +4°C (control), -20°C in one hour and -20°C in two hours. For this purpose, we measure relative water content (RWC) and electrolyte leakage (EL). Results of first experiment showed that 44% electron transport rate and 46% photochemical quenching was significantly reduced. This reduction in P. atlantica was grater by 30% compared to P. khinjuk. Second experiment results revealed that leaf RWC and EL increased during cold acclimation to be 8 and 11%, respectively. In addition, stem EL increased only in P. khinjuk (44%). In fact, P. atlantica due to decreasing of RWC during acclimation was able to maintain the photosystem efficiency and showed more resistance to cold stress. According to our findings, we can identify cold-resistant species or genotypes by measuring the florescence's chlorophyll. |
topic |
chlorophyll fluorescence electrolyte leakage hardening zagros |
url |
http://www.ijf-isaforestry.ir/article_93393_b46513d83b8d1ec4035f1f5f078fc20c.pdf |
work_keys_str_mv |
AT somayehhomayoonfar effectofcoldstressonphysiologicaltraitsofpistaciaatlanticaandpkhinjukduringacclimation AT rzolfaghari effectofcoldstressonphysiologicaltraitsofpistaciaatlanticaandpkhinjukduringacclimation AT payamfayyaz effectofcoldstressonphysiologicaltraitsofpistaciaatlanticaandpkhinjukduringacclimation |
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