EFFECT OF SHORT-TERM SALINITY ON PHOTOSYNTHESIS AND ION RELATIONS IN TWO SUGAR BEET CULTIVARS

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DADKHAH ALIREZA; Rassam Ghorbanali

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Journal: IRANIAN JOURNAL OF PLANT PHYSIOLOGY Year:2017 | Volume:7 | Issue:2 Page(s): 1983-1989

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Information Journal Paper

Title

EFFECT OF SHORT-TERM SALINITY ON PHOTOSYNTHESIS AND ION RELATIONS IN TWO SUGAR BEET CULTIVARS

Author(s)

DADKHAH ALIREZA | Rassam Ghorbanali | Issue Writer Certificate

Keywords

BETA VULGARISQ3

SALT STRESSQ2

STOMATAL CONDUCTANCEQ2

NACLQ1

Abstract

A factorial pot experiment was conducted based on randomized complete blocks design in green house condition to investigate the effect of short-term SALT STRESS on leaf photosynthesis and ion relations of two sugar beet cultivars (Madison and 7233-P29). Plants were exposed to 0, 50, 150, 250, and 350 mM salinity (NaCl and CaCl2 in 5: 1 molar ratio) for 48 hours. Measurements were done on youngest fully expanded leaves. Salinity caused a significant reduction in STOMATAL CONDUCTANCE and consequently leaf net photosynthesis in both cultivars. Net photosynthesis of cv 7233-P29 at low level of salinity (50 mM) at 12 h, 24 h and 48 hours after salinity application decreased by 7.4%, 15.1% and 20%, respectively, compared to control. However, reduction in photosynthesis at highest level of salinity (350 mM) at the same times were 62.4%, 73%, and 72.3%, respectively, compared to control. For Madison the percent of reduction was significantly higher than P29. Cultivar P29 at 12 and 24 hours after salinization had significantly higher Na+ content than Madison up to 250 mM. Potassium concentration tended to decrease with increase in salinity. Salinity led to increased Cl- concentration in both cultivars. However, Madison had significantly higher Cl- content than P29 at the highest level of salinity at all three times of sampling. A strong correlation between photosynthesis and STOMATAL CONDUCTANCE (R2=0.98) and weak correlation between photosynthesis and sodium concentration (R2=0.22), and photosynthesis and chloride concentration (R2=0.55) indicated that in short-term exposure to salinity, STOMATAL CONDUCTANCE was one of the main causes of photosynthesis.

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APA: Copy

DADKHAH, ALIREZA, & Rassam, Ghorbanali. (2017). EFFECT OF SHORT-TERM SALINITY ON PHOTOSYNTHESIS AND ION RELATIONS IN TWO SUGAR BEET CULTIVARS. IRANIAN JOURNAL OF PLANT PHYSIOLOGY, 7(2), 1983-1989. SID. https://sid.ir/paper/259054/en

Vancouver: Copy

DADKHAH ALIREZA, Rassam Ghorbanali. EFFECT OF SHORT-TERM SALINITY ON PHOTOSYNTHESIS AND ION RELATIONS IN TWO SUGAR BEET CULTIVARS. IRANIAN JOURNAL OF PLANT PHYSIOLOGY[Internet]. 2017;7(2):1983-1989. Available from: https://sid.ir/paper/259054/en

IEEE: Copy

ALIREZA DADKHAH, and Ghorbanali Rassam, “EFFECT OF SHORT-TERM SALINITY ON PHOTOSYNTHESIS AND ION RELATIONS IN TWO SUGAR BEET CULTIVARS,” IRANIAN JOURNAL OF PLANT PHYSIOLOGY, vol. 7, no. 2, pp. 1983–1989, 2017, [Online]. Available: https://sid.ir/paper/259054/en

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