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Effect of Periods and Conditions of Preservation in Gene Banks on Seed Viability of Balanites aegyptiaca (L.) Del.

By Doaa Medany on August 15,2011



El-Sayed M. Khalil1*, Mohamed A. Ali3, Nahed M. Nour El-Din2, and Mohamed A. El-Mekawy3

1Egyptian Deserts Gene Bank, North Sinai Research Station, Desert Research Center, El-Arish, Egypt

2Plants Ecology and Range Management Department, Desert Research Center, Matariya, Cairo, Egypt

3Plant production Department, Faculty of Environmental Agriculture Science, Suez Canal University, Egypt



The present study was carried out in the Egyptian Deserts Gene Bank (EDGB), North Sinai Research

Station, Desert Research Center, Egypt, during the period of 2005 to 2008. The aim of this study was to

investigate the seed viability of Balanites aegyptiaca (L.) Del. Under different storage conditions (room

temperature, +4oC and -22oC) and various storage periods (fresh seeds (control), 6 months, 12 months

and 5 years "seeds were stored up to 5 years ago in Egyptian Deserts Gene Bank" ). Different breaking

dormancy treatments were used to encourage, germination of Balanites aegyptiaca (L.) Del seeds. The

results showed significant effects for conservation conditions, storage periods and dormancy breaking

treatments on seed viability parameters. Germination percentage was the highest when seeds were stored

under +4oC for six months and when treated by dry heat at 60oC for 15 minutes to break dormancy. The

fresh seeds (control, the seeds new collected) gave the highest viability percentage. The seeds, which

stored at -22oC gave the highest value of all germination parameters when were stored for 12 months.

The increase in germination parameters were greatest for seeds treated with 60oC for 15 min. This

significantly denotes the seeds requirement for high temperature to achieve greater viability after storage.

Key words: Balanites aegyptiaca, storage conditions, storage periods, Gene Bank, seed preservation,seed dormancy, seed viability, conservation.



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