Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus Rootstocks
A greenhouse study was undertaken to assess the salt tolerance of two citrus rootstocks, namely, Bakraii (Citrus sp.) and Trifoliate orange (Poncirus trifoliata). A factorial experiment through a completely randomized design (CRD) with three replications and four levels of salt including 0, 20, 40 a...
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| Format: | Article |
| Language: | fas |
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Isfahan University of Technology
2015-03-01
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| Series: | Tulīd va Farāvarī-i Maḥṣūlāt-i Zirā̒ī va Bāghī |
| Subjects: | |
| Online Access: | http://jcpp.iut.ac.ir/browse.php?a_code=A-10-1-213&slc_lang=en&sid=1 |
| _version_ | 1811317430997221376 |
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| author | D. Khoshbakht M. Mirzaei A. A. Ramin |
| author_facet | D. Khoshbakht M. Mirzaei A. A. Ramin |
| author_sort | D. Khoshbakht |
| collection | DOAJ |
| description | A greenhouse study was undertaken to assess the salt tolerance of two citrus rootstocks, namely, Bakraii (Citrus sp.) and Trifoliate orange (Poncirus trifoliata). A factorial experiment through a completely randomized design (CRD) with three replications and four levels of salt including 0, 20, 40 and 60 mM NaCl was conducted. After eight weeks of treatment, number of leaves, plant height, leaf area, wet and dry weight of leaf, stem and root, length of root, chlorophyll content, net CO2 assimilation rate (ACO2), stomatal conductance (gs), transpiration (E) and water use efficiency (WUE) and ion concentrations were measured. Salinity decreased growth and net gas exchange. Trifoliate orange showed the most decrease in growth indices and net gas exchange compared with Bakraii. The ability to limit the transfer of sodium to leaves in low levels of salt was observed in Trifoliate orange, but this ability was not observed in high levels of salt. Results showed that accumulation of chloride in leaves and roots were less in Bakraii compared to the Trifoliate orange. The lower Cl- concentration in leaves of Bakraii than trifoliate orange suggests that the salinity tolerance of Bakraii is associated with less transport of Cl- to the leaves. Salinity increased K+ and decreased Mg2+ and Ca2+ concentrations in leaves of both rootstocks. It is proposed that salt stress effect on plant physiological processes such as changes in plant growth, Cl- and Na+ toxicity, and mineral distribution, decreases chlorophyll content and reduces the photosynthetic efficiency of these citrus species. |
| first_indexed | 2024-04-13T12:06:50Z |
| format | Article |
| id | doaj.art-228a0b550bb74d94b251388972628fcf |
| institution | Directory Open Access Journal |
| issn | 2251-8517 |
| language | fas |
| last_indexed | 2024-04-13T12:06:50Z |
| publishDate | 2015-03-01 |
| publisher | Isfahan University of Technology |
| record_format | Article |
| series | Tulīd va Farāvarī-i Maḥṣūlāt-i Zirā̒ī va Bāghī |
| spelling | doaj.art-228a0b550bb74d94b251388972628fcf2022-12-22T02:47:36ZfasIsfahan University of TechnologyTulīd va Farāvarī-i Maḥṣūlāt-i Zirā̒ī va Bāghī2251-85172015-03-014143547Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus RootstocksD. Khoshbakht0M. Mirzaei1A. A. Ramin2 College of Agriculture, Isfahan University of Technology, Isfahan, Iran. College of Agriculture, Islamic Azad Univ., Garmsar Branch, Garmsar, Iran College of Agriculture, Isfahan University of Technology, Isfahan, Iran. A greenhouse study was undertaken to assess the salt tolerance of two citrus rootstocks, namely, Bakraii (Citrus sp.) and Trifoliate orange (Poncirus trifoliata). A factorial experiment through a completely randomized design (CRD) with three replications and four levels of salt including 0, 20, 40 and 60 mM NaCl was conducted. After eight weeks of treatment, number of leaves, plant height, leaf area, wet and dry weight of leaf, stem and root, length of root, chlorophyll content, net CO2 assimilation rate (ACO2), stomatal conductance (gs), transpiration (E) and water use efficiency (WUE) and ion concentrations were measured. Salinity decreased growth and net gas exchange. Trifoliate orange showed the most decrease in growth indices and net gas exchange compared with Bakraii. The ability to limit the transfer of sodium to leaves in low levels of salt was observed in Trifoliate orange, but this ability was not observed in high levels of salt. Results showed that accumulation of chloride in leaves and roots were less in Bakraii compared to the Trifoliate orange. The lower Cl- concentration in leaves of Bakraii than trifoliate orange suggests that the salinity tolerance of Bakraii is associated with less transport of Cl- to the leaves. Salinity increased K+ and decreased Mg2+ and Ca2+ concentrations in leaves of both rootstocks. It is proposed that salt stress effect on plant physiological processes such as changes in plant growth, Cl- and Na+ toxicity, and mineral distribution, decreases chlorophyll content and reduces the photosynthetic efficiency of these citrus species.http://jcpp.iut.ac.ir/browse.php?a_code=A-10-1-213&slc_lang=en&sid=1Chlorophyll Citrus Mechanisms of salt tolerance Sodium chloride |
| spellingShingle | D. Khoshbakht M. Mirzaei A. A. Ramin Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus Rootstocks Tulīd va Farāvarī-i Maḥṣūlāt-i Zirā̒ī va Bāghī Chlorophyll Citrus Mechanisms of salt tolerance Sodium chloride |
| title | Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus Rootstocks |
| title_full | Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus Rootstocks |
| title_fullStr | Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus Rootstocks |
| title_full_unstemmed | Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus Rootstocks |
| title_short | Effects of Salinity Stress on Gas Exchange, Growth, and Nutrient Concentrations of Two Citrus Rootstocks |
| title_sort | effects of salinity stress on gas exchange growth and nutrient concentrations of two citrus rootstocks |
| topic | Chlorophyll Citrus Mechanisms of salt tolerance Sodium chloride |
| url | http://jcpp.iut.ac.ir/browse.php?a_code=A-10-1-213&slc_lang=en&sid=1 |
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