EFFECTS OF LOW TEMPERATURE AND EXOGENOUS CALCIUM ON THE QUANTUM EFFICIENCY OF PHOTOSYSTEM II ( FV/FM) AND RELATIVE CONTENT OF CHLOROPHYLL IN COLD SUSCEPTIBLE AND TOLERANT WHEAT CULTIVARS

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MAJDI A.; KARIMZADEH GHASEM; MAHFOUZI SIROUS

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Journal: Year:2008 | Volume:20 | Issue:4 (77 IN AGRONOMY AND HORTICULTURE) Page(s): 175-181

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Title

EFFECTS OF LOW TEMPERATURE AND EXOGENOUS CALCIUM ON THE QUANTUM EFFICIENCY OF PHOTOSYSTEM II ( FV/FM) AND RELATIVE CONTENT OF CHLOROPHYLL IN COLD SUSCEPTIBLE AND TOLERANT WHEAT CULTIVARS

Author(s)

MAJDI A. | KARIMZADEH GHASEM | MAHFOUZI SIROUS | Issue Writer Certificate

Keywords

WHEAT (TRITICUM AESTIVUM L.)Q2

COLDQ2

QUANTUM EFFICIENCY OF PHOTOSYSTEM II ( FV/FM)Q3

RELATIVE CONTENT OF CHLOROPHYLLQ1

CALCIUMQ2

Abstract

Plant growth, productivity and distribution are severely limited by environmental stresses including COLD stress. Since COLD is a major uncontrollable factor, more researches are needed on inheritable characteristics for temperature stress tolerant and to increase the tolerance of low temperature. In the present experiment, changes in the quantum efficiency of photosystem II ( Fv/Fm) and RELATIVE CONTENT OF CHLOROPHYLL ( SPAD reading) in the leaves, were studied in a susceptible Kohdasht spring cultivar (LT50= − 6°C) and 2 tolerant winter Sardari (LT50= − 16°C) and Norstar (LT50= − 24°C) wheat cultivars (Triticum aestivum L.) exposed to constant 4°C for 35 d and 4°C with foliar application of 0.01M CaCl2. Measurement were carried out on day 14 which considered as day 0 (before exposure to 4°C) and days 2, 14, 21 and 35 of exposure to 4°C. Results showed that COLD decreased quantum efficiency of photosystem II ( Fv/Fm) in all cultivars, but further decreases observed in Kohdasht spring wheat cultivar compared to two winter cultivars. With increasing COLD exposure time, all cultivars tended to increase RELATIVE CONTENT OF CHLOROPHYLL in their leaves, but in two winter wheat cultivars further increase observed compare to spring cultivar. Results showed that foliar application of CaCl2 was not significant effect on the quantum efficiency of photosystem II (Fv/Fm) and RELATIVE CONTENT OF CHLOROPHYLL in these studied cultivars.

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APA: Copy

MAJDI, A., KARIMZADEH, GHASEM, & MAHFOUZI, SIROUS. (2008). EFFECTS OF LOW TEMPERATURE AND EXOGENOUS CALCIUM ON THE QUANTUM EFFICIENCY OF PHOTOSYSTEM II ( FV/FM) AND RELATIVE CONTENT OF CHLOROPHYLL IN COLD SUSCEPTIBLE AND TOLERANT WHEAT CULTIVARS. PAJOUHESH-VA-SAZANDEGI, 20(4 (77 IN AGRONOMY AND HORTICULTURE)), 175-181. SID. https://sid.ir/paper/20018/en

Vancouver: Copy

MAJDI A., KARIMZADEH GHASEM, MAHFOUZI SIROUS. EFFECTS OF LOW TEMPERATURE AND EXOGENOUS CALCIUM ON THE QUANTUM EFFICIENCY OF PHOTOSYSTEM II ( FV/FM) AND RELATIVE CONTENT OF CHLOROPHYLL IN COLD SUSCEPTIBLE AND TOLERANT WHEAT CULTIVARS. PAJOUHESH-VA-SAZANDEGI[Internet]. 2008;20(4 (77 IN AGRONOMY AND HORTICULTURE)):175-181. Available from: https://sid.ir/paper/20018/en

IEEE: Copy

A. MAJDI, GHASEM KARIMZADEH, and SIROUS MAHFOUZI, “EFFECTS OF LOW TEMPERATURE AND EXOGENOUS CALCIUM ON THE QUANTUM EFFICIENCY OF PHOTOSYSTEM II ( FV/FM) AND RELATIVE CONTENT OF CHLOROPHYLL IN COLD SUSCEPTIBLE AND TOLERANT WHEAT CULTIVARS,” PAJOUHESH-VA-SAZANDEGI, vol. 20, no. 4 (77 IN AGRONOMY AND HORTICULTURE), pp. 175–181, 2008, [Online]. Available: https://sid.ir/paper/20018/en

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