The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz)
Identifying the physiological traits associated with salt tolerance is important in optimal management of biosaline systems and optimum utilization of saline water resources in dry and saline areas. Therefore, some indices of photosynthetic activity, dry matter production and accumulation of sodium...
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| Format: | Article |
| Language: | English |
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Society of Land Measurements and Cadastre from Transylvania (SMTCT)
2012-05-01
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| Series: | Notulae Scientia Biologicae |
| Online Access: | http://www.notulaebiologicae.ro/index.php/nsb/article/view/7363 |
| _version_ | 1828522722415607808 |
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| author | Hamid R. ESHGHIZADEH Mohammad KAFI Ahmad NEZAMI |
| author_facet | Hamid R. ESHGHIZADEH Mohammad KAFI Ahmad NEZAMI |
| author_sort | Hamid R. ESHGHIZADEH |
| collection | DOAJ |
| description | Identifying the physiological traits associated with salt tolerance is important in optimal management of biosaline systems and optimum utilization of saline water resources in dry and saline areas. Therefore, some indices of photosynthetic activity, dry matter production and accumulation of sodium and potassium ions in Blue panicgrass (Panicum antidotale Retz) were evaluated in five levels of salinity treatment (0, 70, 140, 210 and 280 mM NaCl solution) under greenhouse conditions. The results showed that at 28 and 35 days after salt stress, plant leaf area reduced in the highest salinity treatment, 93 and 96% respectively, compared with control. Leaf stomatal conductance, CO2 fixation and quantum efficiency of photosystem II were decreased by increasing salinity. It caused also a reduction in chlorophyll content (Chl a, Chl b) in leaves of Blue panicgrass. Content of carotenoids showed binary patterns to different salinity levels, slightly increased in 70-140 mM NaCl and decreased again in 210-280 mM, respectively. Increasing levels of salinity, increased sodium content in both roots and shoots but the shoots potassium content decreased. Decline in photosynthesis indices caused the reduction of root and shoot dry weight. This decrease resulted from lower leaf area (r=0.91**), lower stomatal conductance (r=0.78**), lower CO2 fixed in photosynthesis (r=0.63**), lower quantum efficiency of photosystem II (r=0.54**) and lower Chl a (r=0.45**), respectively. Data analysis base on using stepwise regression introduced leaf area (?=0.560), chlorophyll a content (?=0.245) and shoot potassium content (?= 0.264) as main effective components of salinity tolerance in Blue panicgrass. |
| first_indexed | 2024-12-11T20:14:19Z |
| format | Article |
| id | doaj.art-de5153a618c344b5826f5f4b083f620a |
| institution | Directory Open Access Journal |
| issn | 2067-3205 2067-3264 |
| language | English |
| last_indexed | 2024-12-11T20:14:19Z |
| publishDate | 2012-05-01 |
| publisher | Society of Land Measurements and Cadastre from Transylvania (SMTCT) |
| record_format | Article |
| series | Notulae Scientia Biologicae |
| spelling | doaj.art-de5153a618c344b5826f5f4b083f620a2022-12-22T00:52:14ZengSociety of Land Measurements and Cadastre from Transylvania (SMTCT)Notulae Scientia Biologicae2067-32052067-32642012-05-0142596410.15835/nsb4273637097The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz)Hamid R. ESHGHIZADEH0Mohammad KAFI1Ahmad NEZAMI2Ferdowsi University of Mashhad, Faculty of Agriculture, Department of Agronomy and Plant Breeding, Mashhad, P.O. Box 91775-1163Ferdowsi University of Mashhad, Faculty of Agriculture, Department of Agronomy and Plant Breeding, Mashhad, P.O. Box 91775-1163Ferdowsi University of Mashhad, Faculty of Agriculture, Department of Agronomy and Plant Breeding, Mashhad, P.O. Box 91775-1163Identifying the physiological traits associated with salt tolerance is important in optimal management of biosaline systems and optimum utilization of saline water resources in dry and saline areas. Therefore, some indices of photosynthetic activity, dry matter production and accumulation of sodium and potassium ions in Blue panicgrass (Panicum antidotale Retz) were evaluated in five levels of salinity treatment (0, 70, 140, 210 and 280 mM NaCl solution) under greenhouse conditions. The results showed that at 28 and 35 days after salt stress, plant leaf area reduced in the highest salinity treatment, 93 and 96% respectively, compared with control. Leaf stomatal conductance, CO2 fixation and quantum efficiency of photosystem II were decreased by increasing salinity. It caused also a reduction in chlorophyll content (Chl a, Chl b) in leaves of Blue panicgrass. Content of carotenoids showed binary patterns to different salinity levels, slightly increased in 70-140 mM NaCl and decreased again in 210-280 mM, respectively. Increasing levels of salinity, increased sodium content in both roots and shoots but the shoots potassium content decreased. Decline in photosynthesis indices caused the reduction of root and shoot dry weight. This decrease resulted from lower leaf area (r=0.91**), lower stomatal conductance (r=0.78**), lower CO2 fixed in photosynthesis (r=0.63**), lower quantum efficiency of photosystem II (r=0.54**) and lower Chl a (r=0.45**), respectively. Data analysis base on using stepwise regression introduced leaf area (?=0.560), chlorophyll a content (?=0.245) and shoot potassium content (?= 0.264) as main effective components of salinity tolerance in Blue panicgrass.http://www.notulaebiologicae.ro/index.php/nsb/article/view/7363 |
| spellingShingle | Hamid R. ESHGHIZADEH Mohammad KAFI Ahmad NEZAMI The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz) Notulae Scientia Biologicae |
| title | The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz) |
| title_full | The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz) |
| title_fullStr | The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz) |
| title_full_unstemmed | The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz) |
| title_short | The Mechanisms of Salinity Tolerance in the Xero-halophyte Blue Panicgrass (Panicum antidotale Retz) |
| title_sort | mechanisms of salinity tolerance in the xero halophyte blue panicgrass panicum antidotale retz |
| url | http://www.notulaebiologicae.ro/index.php/nsb/article/view/7363 |
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