Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock

Drought is one of the main important adverse environmental events, certainly has an impact on plant growth and development. Pistachio is cultivated in areas where soil water deficits and salinity conditions are higher than normal. In most orchards, deficit irrigation is a common practice. There is o...

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Autores principales:	Seyed Reza Nezami, Abbas Yadollahi, Hossein Hokmabadi, Ali Tajabadipour
Formato:	article
Lenguaje:	EN
Publicado:	Islamic Azad University 2021
Materias:	drought stress multivariate analysis pistachio hybrids rehydration Agriculture (General) S1-972
Acceso en línea:	https://doaj.org/article/b911926060bd4fb3a1101e037cbc8e4f
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spelling	oai:doaj.org-article:b911926060bd4fb3a1101e037cbc8e4f2021-11-30T06:45:05ZChanges in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock2383-319X2383-341610.22034/jon.2021.1937156.1122https://doaj.org/article/b911926060bd4fb3a1101e037cbc8e4f2021-11-01T00:00:00Zhttp://ijnrs.damghaniau.ac.ir/article_685419_bf0a250ee2894ceade00c37fdb772758.pdfhttps://doaj.org/toc/2383-319Xhttps://doaj.org/toc/2383-3416Drought is one of the main important adverse environmental events, certainly has an impact on plant growth and development. Pistachio is cultivated in areas where soil water deficits and salinity conditions are higher than normal. In most orchards, deficit irrigation is a common practice. There is only limited understanding of the physiological mechanisms pistachio uses to survive in drought. Many adaptive strategies have been developed in plants for dealing with water stress. The objective of the present study was to evaluate the effect of drought stress on the photosynthetic, physiological and biochemical parameters in one-year-old seedlings of 12 pistachio hybrids. Therefore, a greenhouse experiment was carried out to assess the effects of two drought stress treatments (drought stress and full-irrigation) for 40 days with a subsequent two weeks’ recovery period and several parameters (pigments (total chlorophyll, anthocyanins and carotenoids), internal CO2 concentration (Ci), chloride (Cl-) ions and fluorescence parameter) were evaluated at four different times (beginning, middle and end of stress and then recovery). After the end of the stress period, the seedlings were irrigated for two weeks. Results revealed that the drought stress treatments led to a change in the studied parameters and the mechanism of drought tolerance was variable at different times. Pistacia atlantica hybrid, P. vera “Sarakhs” and P. vera “Shasti” hybrid rootstocks had the highest water use efficiency; P. vera “Sarakhs” hybrid, P. vera “Khanjari” hybrid and P. vera “Badami” hybrid had the highest Cl- and mesophyll efficiency. P. atlantica and P. vera “Khanjari” had the highest anthocyanins and carotenoids. P. vera “Shasti”, P. vera “badami”, P. mutica and P. mutica hybrid rootstocks have been able to withstand drought stress by increasing the amount of K+ ion and maintaining gas exchanges. The results also showed that the response of the rootstocks to rehydration was different. Seedlings that recovered well after rehydration had a higher tolerance threshold. The “Khanjari” cultivar was recovered better than the others.Seyed Reza NezamiAbbas YadollahiHossein HokmabadiAli TajabadipourIslamic Azad Universityarticledrought stressmultivariate analysispistachio hybridsrehydrationAgriculture (General)S1-972ENJournal of Nuts, Vol 12, Iss 4, Pp 333-360 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	drought stress multivariate analysis pistachio hybrids rehydration Agriculture (General) S1-972
spellingShingle	drought stress multivariate analysis pistachio hybrids rehydration Agriculture (General) S1-972 Seyed Reza Nezami Abbas Yadollahi Hossein Hokmabadi Ali Tajabadipour Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock
description	Drought is one of the main important adverse environmental events, certainly has an impact on plant growth and development. Pistachio is cultivated in areas where soil water deficits and salinity conditions are higher than normal. In most orchards, deficit irrigation is a common practice. There is only limited understanding of the physiological mechanisms pistachio uses to survive in drought. Many adaptive strategies have been developed in plants for dealing with water stress. The objective of the present study was to evaluate the effect of drought stress on the photosynthetic, physiological and biochemical parameters in one-year-old seedlings of 12 pistachio hybrids. Therefore, a greenhouse experiment was carried out to assess the effects of two drought stress treatments (drought stress and full-irrigation) for 40 days with a subsequent two weeks’ recovery period and several parameters (pigments (total chlorophyll, anthocyanins and carotenoids), internal CO2 concentration (Ci), chloride (Cl-) ions and fluorescence parameter) were evaluated at four different times (beginning, middle and end of stress and then recovery). After the end of the stress period, the seedlings were irrigated for two weeks. Results revealed that the drought stress treatments led to a change in the studied parameters and the mechanism of drought tolerance was variable at different times. Pistacia atlantica hybrid, P. vera “Sarakhs” and P. vera “Shasti” hybrid rootstocks had the highest water use efficiency; P. vera “Sarakhs” hybrid, P. vera “Khanjari” hybrid and P. vera “Badami” hybrid had the highest Cl- and mesophyll efficiency. P. atlantica and P. vera “Khanjari” had the highest anthocyanins and carotenoids. P. vera “Shasti”, P. vera “badami”, P. mutica and P. mutica hybrid rootstocks have been able to withstand drought stress by increasing the amount of K+ ion and maintaining gas exchanges. The results also showed that the response of the rootstocks to rehydration was different. Seedlings that recovered well after rehydration had a higher tolerance threshold. The “Khanjari” cultivar was recovered better than the others.
format	article
author	Seyed Reza Nezami Abbas Yadollahi Hossein Hokmabadi Ali Tajabadipour
author_facet	Seyed Reza Nezami Abbas Yadollahi Hossein Hokmabadi Ali Tajabadipour
author_sort	Seyed Reza Nezami
title	Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock
title_short	Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock
title_full	Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock
title_fullStr	Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock
title_full_unstemmed	Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock
title_sort	changes in drought tolerance mechanism at different times of stress and re-hydration in hybrid pistachio rootstock
publisher	Islamic Azad University
publishDate	2021
url	https://doaj.org/article/b911926060bd4fb3a1101e037cbc8e4f
work_keys_str_mv	AT seyedrezanezami changesindroughttolerancemechanismatdifferenttimesofstressandrehydrationinhybridpistachiorootstock AT abbasyadollahi changesindroughttolerancemechanismatdifferenttimesofstressandrehydrationinhybridpistachiorootstock AT hosseinhokmabadi changesindroughttolerancemechanismatdifferenttimesofstressandrehydrationinhybridpistachiorootstock AT alitajabadipour changesindroughttolerancemechanismatdifferenttimesofstressandrehydrationinhybridpistachiorootstock
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Changes in Drought Tolerance Mechanism at Different Times of Stress and Re-hydration in Hybrid Pistachio Rootstock

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