Gamma effects on seeds and cuttings of certain vine varieties of the Vitis vinifera L. species (in Bulgarian)
The separate vine varieties exhibit different degrees of radioresistance following irradiation of stratified seeds with gamma rays. The low-dose irradiation with gamma rays exerts a stimulating effect on the rate of germination. The higher the radioresistance of the variety the bigger is the limit of the doses and vice versa. Doses above 10,000 R are practically lethal since the seeds that germinated after irradiation cannot grow as plants and perish at different stages of their development. The dose 10,000 R appears lethal or sub-lethal depending on the radioresistance of the vine variety since separate plants of certain varieties survive. The most appropriate dose for irradiating cuttings for green grafting with the aim of provoking mutational changes appears to be 2000 R at which is achieved successful grafting and development of the grafts with well expressed radiomorphoses. Doses of 4000 and 6000 R kill the leading shoot and in spite of the fact that the shoots remain green and fresh until the autumn the bud does not develop into shoot. That is why they are considered lethal. Irradiation with 8000 R causes radical changes leading to lack of callus formation and low rate of successful grafting owing to which the dose is considered absolutely lethal. (auth)
- Research Organization:
- Komitet za Mirno Izpolzuvane na Atomnata Energiya, Sofia (Bulgaria); Akademiya na Selskostopanskite Nauki, Sofia (Bulgaria)
- NSA Number:
- NSA-29-024467
- OSTI ID:
- 4307408
- Report Number(s):
- INIS-mf--756
- Country of Publication:
- Bulgaria
- Language:
- Bulgarian
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