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- Title
Qualidade fisiológica de sementes de arroz submetidas à radiação gama.
- Authors
Miranda, Helen Lúcia de Cruz; Bobrowski, Vera Lucia; Tillmann, Maria Angela André; Dode, Luciana Bicca; Meneghello, Geri Eduardo
- Abstract
The objective of this research was to evaluate the effects of the gamma radiation (Co60) on the physiological quality of rice seeds. The research was carried out through three tests; in the first test rice seeds were irradiated at dosages of 0; 1; 2.5 and 5Gy, while for the second and third tests the seeds were subjected to accelerated aging before being irradiated. For the second test the seeds were divided into wet and dry and both groups subjected to accelerated aging previous to irradiation at dosages of 0; 1; 2.5 and 5Gy. For the third test the seeds were dried after being subjected to accelerated aging, and then irradiated at dosages of 0, 10, 25 and 50Gy. To assess the physiological effects of the gamma radiation, all seeds were tested for germination and their germination speed index recorded. Seedling growth was graded through the measurement of the lengths of the first leaf and seminal root system and total seedling dry weight, across all tests. The enzymatic activity of acid phosphatase and alpha-amylase was measured on dry seeds from the second test. The results from all tests indicate that the applied gamma radiation dosages did not cause any changes to the physiological quality of rice seeds.
- Subjects
GAMMA rays; RICE seed industry; IRRADIATION; GERMINATION; PLANT embryology; PLANT physiology; AMYLASES; ACID phosphatase; AGING in plants
- Publication
Ciência Rural, 2009, Vol 39, Issue 5, p1320
- ISSN
0103-8478
- Publication type
Article
- DOI
10.1590/S0103-84782009005000061