Document Type : Research Paper

Authors

1 Former MS student of Department of Horticulture, Faculty of Agricuture, Shahed University, Tehran, Iran

2 Assistance Professor of Department of Horticulture, Faculty of Agricuture, Shahed University, Tehran, Iran

3 Full Professor of Department of Horticulture, Faculty of Agricuture, Shahed University, Tehran

Abstract

Strawberry is sensitive to salinity stress. This experiment was conducted as factorial based on RCBD design to investigate the effects of putrescine treatments on reducing harmful effects of NaCl salinity stress in strawberry at Shahed University in 2015. NaCl treatments, 0, 25 and 50 mM, were applied in hydroponic medium on from the root zone of ‘Camarosa’ cultivar. Putrescine treatments were also applied at 0, 1.5 and 3 mM as foliage spray during growth period in 4 times with 15 days intervals. The results showed that, NaCl treatment especially at 50 mM, reduced shoot length, shoot fresh and dry weight, root fresh and dry weight, leaf number, leaf chlorophyll content, fruit number, fruit fresh and dry weight, yield and titratable acidity, and increased anthocyanin and total soluble solid content. Salinity stress had no effects on the root length. Application of 1.5 and 3 mM putrescines reduced harmful effects of salinity stress. Putrescines increased almost all characteristics under salinity condition and reduced total soluble solid content. Therefore, according to the results, putrescine, in both levels of 1.5 and 3 mM, could be a well strategy to reduce the limitation of salinity stress in strawberry production.

Keywords

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