Document Type : Research Paper

Authors

1 Associate Professor, Department of Horticulture, Faculty of Agriculture, Damghan Branch, Islamic Azad University, Damghan, Iran

2 Previus Msc Student, Department of Horticulture, Faculty of Agriculture, Damghan Branch, Islamic Azad University, Damghan, Iran

3 Lecturer of Horticulture Section, Agriculture Research Center of Semnan, Shahrood, Iran

4 Assistant Professor, Department of Horticulture, Faculty of Agriculture, Shiraz Branch, Islamic Azad University, Shiraz, Iran

Abstract

In order to study the effect of different concentrations of salicylic acid in two commercial apricot
cultivars of Shahrood namely ‘Shahrood 41’ and ‘Jaffari’, under cold stress, a factorial experiment was
conducted in a randomized complete block design with three replications in 2012 at the Agricultural
Research Center of Shahrood city. The test had four factors including: SA with three levels (0.625, 0.125,
0.25mM), three stages of phenological growth (dormancy, swelling and flowering) and four temperature
(four, zero, -2 and -4 degree centigrade) and two apricot cultivars (‘Shahrood 41’ and ‘Jaffari’) and
measured traits were proline and soluble sugars. ‘Jaffari’ cultivar had the highest amount of soluble
sugars at -4 degree centigrade in bud swelling stage and the maximum rate of proline belonged to
0.25mM of SA in the same cultivar, -4 degree centigrade and bud swelling stage. Ion leakage at different
temperatures and different phonological growth stages were significantly different at five percent level.
‘Jaffari’ with lower ion leakage at -4 degree and higher proline content than ‘Shahrood 41’ had higher
resistance to frost.

Keywords

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