Journal of Stress Physiology & Biochemistry, Vol. 9 No. 4 2013, pp. 289-298 ISSN 1997-0838
Original Text Copyright (cc) 2013 by   Azadi, Younesi

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The Effects of Storage on Germination Characteristics and Enzyme Activity of Sorghum Seeds

Azadi M.S.1, Younesi E.2*

1 Department of Agronomy and Plant Breeding, Islamic Azad University, Dezfoul Branch, Iran.
2 Department of Agronomy and Plant Breeding, Faculty of Agriculture, University of Tehran, Karaj, Iran.


Received July 23, 2013

Seed moisture content (MC) and storage temperature are the most important factors affecting seed longevity and vigor. Exposure to warm, moist air is principally responsible for this. Proper storage and optimum seed moisture content can affect the grain quality significantly. The purpose of this study was to evaluate the different storage  treatments on seed  quality of sorghum.  The seed materials were fresh without any storage period. For storage treatments, 3 seed moisture contents (6, 10, 14 %) were stored for 8 month in 0.5 L capacity sealed aluminum foil packet in 0.3 bar inside incubators  set at  4  temperatures  (5,  15, 25, 35 C). After storage  time, the higher  the storage temperature, the lower was the grain quality of sorghum. The highest germination percentage, germination  index,  normal  seedling  percentage  were  achieved  in  control  conditions  (0  day  of storage).  Our  results  showed  that  increasing  storage  duration  resulted  higher  reduction  in germination characteristics. Also our results showed that, germination percentage, means time to germination,  germination  index,  normal  seedling  percentage  decrease  significantly  by  storage. Enzyme activity decrease significantly by increased in storage.

Key words:  Storage, Germination characteristics, Sorghum, enzyme activity

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