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| Evaluation of differential cadmium accumulation ability in different tobacco species |
| Received:May 10, 2016 |
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| KeyWord:tobacco, cadmium, tolerance, accumulation, differential evaluation |
| Author Name | Affiliation | E-mail | | LIU Deng-lu | College of Resource Sciences, Sichuan Agricultural University, Chengdu 611130, China | | | LI Ting-xuan | College of Resource Sciences, Sichuan Agricultural University, Chengdu 611130, China | litinx@263.net | | YU Hai-ying | College of Resource Sciences, Sichuan Agricultural University, Chengdu 611130, China | | | ZHANG Lu | College of Resource Sciences, Sichuan Agricultural University, Chengdu 611130, China | | | WANG Yong | Liangshan Branch of Sichuan Tobacco Company, Xichang 615000, China | |
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| Abstract: |
| A hydroponic experiment was conducted to obtain tobacco germplasm resources with lower Cd accumulation characteristics from 93 tobacco species by evaluating Cd tolerance index and accumulation, so as to provide species and information for the further researches on the genetic characteristics and cultivation of tobaccos with lower Cd accumulation characteristics, of which Cd accumulation characteristics were also analyzed. For the different treatments of Cd, the shoots of all tobaccos were inhibited and showed significantly difference among species. According to the cluster analysis, all species were classified as three types of high tolerance, middle tolerance and low tolerance. The biomass and the tolerance index of the high tolerance and middle tolerance species were significantly higher than those of the low tolerance species. There was observed a significant difference in Cd accumulation of middle tolerance and high tolerance species. According to the cluster analysis of Cd content, the medium tolerance and high tolerance species were classified as three types, which were low accumulation, middle accumulation and high accumulation species. 12 and 10 kinds of low accumulation species were obtained at the treatment of 2 mg·L-1 and 10 mg·L-1 Cd. The biomass and Cd accumulation of the low accumulation, middle accumulation and high accumulation species decreased with the increasing Cd concentrations, while Cd content in shoots of tobaccos increased with the increasing Cd concentrations. There was not noticed a significant difference in shoot biomass between the low accumulation species and other species, but Cd content and Cd accumulation of the low accumulation species were significant lower than other species. In this study, 7 kinds of tobacco species with lower Cd accumulation characteristics(Yuyan85", "Zhongyan90", "Cuibiyihao", "CF986", "91-58#" and "960116#) were obtained. And these provide excellent genetic materials for the cultivation of tobaccos with lower Cd accumulation characteristics. |
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