Study on the Sensitivity of Different Pretreated Bauhinia Seeds to 60Coγ Irradiation
《北方园艺》[ISSN:1001-0009/CN:23-1247/S]
- Issue:
- 2018年24
- Page:
- 98-103
- Research Field:
- Publishing date:
Info
- Title:
- Study on the Sensitivity of Different Pretreated Bauhinia Seeds to 60Coγ Irradiation
- Author(s):
- TANG Changliang; CHEN Yong; LI Hao; QIAN Lei; WU Zhongfeng
- (Forestry Science and Technology Center,Guangzhou Institute of Forestry and Landscape Architecture,Guangzhou,Guangdong 510405)
- Keywords:
- seed pretreatments; Bauhinia seeds; sensitivity; 60Coγ irradiation
- PACS:
- -
- DOI:
- 10.11937/bfyy.20181131
- Abstract:
- The seeds of Bauhinia were used as materials, 60Coγ irradiation,seed pretreatment and germination experiment methods were used,the sensitivity of Bauhinia variegata seeds to the radiation-induced mutation of 60Coγ was studied,in order to provide theoretical and technical basis for the radiation mutation breeding of Bauhinia variegata.The results showed that,under a greater than or equal to 120 Gy irradiation dose,the germination rate decreased from 89.33%-92.33% to 72.00%-79.67%,the germination index from 158.00-174.80 to 82.50-106.30,the seedling rate from 74.33%-75.33% to 50.00%-55.67%,the seedling rate from 84.73-88.40 to 24.63-37.50,the seedling rate from 70.00%-72.33% to 42.00%-46.00%,the seedling height from 25.80-29.03 cm to 18.00-23.13 cm and the change rate of blade opening angle increased from 2.67%-5.00% to 9.67%-17.00%,suggesting the beginning of significant changes in most indicators of seeds and seedlings.However,the majority of the indicators of the seeds and seedlings had begun to show similar significant changes after being soaked for 12 hours seeds under over or equal to 60 Gy irradiation dose.Therefore,when the water content of Bauhinia variegata seeds was increased or the dormancy is broken,their sensitivity to the radiation of the 60Coγ would become higher;otherwise,the sensitivity would become lower.The conclusion would lay a solid foundation for the irradiation induced mutation of the Bauhinia variegata seeds under different preservation or pretreatment conditions.
Last Update: 2019-02-11