<abstract xmlns="http://www.w3.org/1999/xhtml"><p>To evaluate phytohormones effects on stomatal conductance, chlorophyll fluorescence, membrane stability, relative water content and chlorophyll content under salinity, a factorial experiment with 4 replicates was conducted. Treatments were salinity (0, 3.5 and 7 dS/m), phytohormones (control, gibberellic acid and abscisic acid) and wheat cultivars (Gascogen, Zagros, and Kuhdasht). Results showed that a high level of salinity increased chlorophyll fluorescence and relative water content, while membrane stability, chlorophyll content, and stomatal conductance were decreased. Abscisic acid treatment had more effective role in membrane stability. Although membrane stability was much more under gibberellic acid treatment, restoration of membrane stability was considerable under abscisic acid treatment for Gascogen and Kuhdasht cultivars. Spraying of gibberellic acid induced the highest chlorophyll content in the three salinity levels and all of the cultivars. The maximum amount of stomatal conductance was achieved under gibberellic acid treatment. Abscisic acid caused less chlorophyll fluorescence in comparison to gibberellic acid. About relative water content, abscisic acid was effective in high salinity levels so that it caused stomatal closure, which reduced water loss and maintained turgor in plants.</p></abstract>

To evaluate phytohormones effects on stomatal conductance, chlorophyll fluorescence, membrane stability, relative water content and chlorophyll content under salinity, a factorial experiment with 4 replicates was conducted. Treatments were salinity (0, 3.5 and 7 dS/m), phytohormones (control, gibberellic acid and abscisic acid) and wheat cultivars (Gascogen, Zagros, and Kuhdasht). Results showed that a high level of salinity increased chlorophyll fluorescence and relative water content, while membrane stability, chlorophyll content, and stomatal conductance were decreased. Abscisic acid treatment had more effective role in membrane stability. Although membrane stability was much more under gibberellic acid treatment, restoration of membrane stability was considerable under abscisic acid treatment for Gascogen and Kuhdasht cultivars. Spraying of gibberellic acid induced the highest chlorophyll content in the three salinity levels and all of the cultivars. The maximum amount of stomatal conductance was achieved under gibberellic acid treatment. Abscisic acid caused less chlorophyll fluorescence in comparison to gibberellic acid. About relative water content, abscisic acid was effective in high salinity levels so that it caused stomatal closure, which reduced water loss and maintained turgor in plants.

Interaction of Salinity and Phytohormones on Wheat Photosynthetic Traits and Membrane Stability

University of Mohaghegh Ardabili, Ardabil

Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Mohaghegh Ardabili, Ardabil, Iran

Agriculture (Pol'nohospodárstvo)

To evaluate phytohormones effects on stomatal conductance, chlorophyll fluorescence, membrane stability, relative water content and chlorophyll content under...

Interaction of Salinity and Phytohormones on Wheat Photosynthetic Traits and Membrane Stability

Published Online: Apr 12, 2013

Page range: 33 - 41

DOI: https://doi.org/10.2478/agri-2013-0004

Keywords
Triticum aestivum, NaCl, gibberellic acid, abscisic acid, chlorophyll fluorescence, stomatal conductance

This content is open access.

Interaction of Salinity and Phytohormones on Wheat Photosynthetic Traits and Membrane Stability

Published Online: Apr 12, 2013

Page range: 33 - 41

DOI: https://doi.org/10.2478/agri-2013-0004

KeywordsTriticum aestivum, NaCl, gibberellic acid, abscisic acid, chlorophyll fluorescence, stomatal conductance

This content is open access.

Keywords
Triticum aestivum, NaCl, gibberellic acid, abscisic acid, chlorophyll fluorescence, stomatal conductance