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60Co-γ射线对小苍兰的生物学效应(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2019年01期
Page:
186-192
Column:
研究简报
publishdate:
2019-01-28

Article Info:/Info

Title:
The biological effects of 60Co-γ rays on Freesia refracta
Article ID:
1000-2006(2019)01-0186-07
Author(s):
LIU Ling1 WANG Dan1* LI Yirui1 MIN Kelian1 CHEN Min1 ZHANG Jiwen1 DENG Shanwen1LI Qing2XIANG Yi2LI Jianwei2
1.College of Life Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China; 2. Biotechnology and Nuclear Technology Research Institute, Sichuan Academy of Agricultural Sciences, Chengdu 610011,China
Keywords:
Freesia refracta Klatt 60Co-γ rays irradiation breeding bulbs
Classification number :
S688.2;S722.3
DOI:
10.3969/j.issn.1000-2006.201801024
Document Code:
A
Abstract:
【Objective】 Investigate the biological effects of 60Co-γ radiation on red Freesia refracta(freesia)and purple freesia. 【Method】 In this study, two different varieties of freesia bulbs were irradiated with 60Co-γ rays at test doses of 25, 50, 75, and 100 Gy. Statistical analyses of the germination rate, semilethal dose, survival rate, plant height, leaf number, leaf area, root length, flowering rate, pollen viability, and pollen scanning electron microscope after irradiation were conducted. 【Result】 The experimental results demonstrate that the germination rate, plant height, leaf area, root length, flowering rate and pollen vigor of the two freesias treated with five different doses of 60Co-γ rays decrease with increasing doses. The optimum dose of freesia(red)is 54.04 Gy, the optimum dose of freesia(purple)is 58.82 Gy, the half flowering dose of freesia(red)is 42.37 Gy, the half flowering dose of freesia(purple)is 39.56 Gy. Pollen surface and pollen morphology gradually increase with increasing irradiation. 【Conclusion】60Co-γ rays of various irradiation doses have damage effects on both freesias, and the degree of damage is positively correlated to the radiation dosage. Analyses on pollen can better reflect the plant mutation induced by radiation of the 60Co-γ rays. The results can serve as references for the mutation breeding of freesia induced by 60Co-γ rays radiation.

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Last Update: 2019-01-28