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中国农学通报

中国农学通报 ›› 2017, Vol. 33 ›› Issue (15): 1-9.doi: 10.11924/j.issn.1000-6850.casb17020058

• 农学 农业基础科学 •    下一篇

镉胁迫下不同细度品种苎麻耐性比较研究

符慧琴1,2,揭红东3,马玉申1,2,揭雨成1,2,邢虎成1,2,温圣贤2   

  1. (1湖南农业大学苎麻研究所,长沙 410128；2湖南农业大学农学院,长沙 410128；3湖南农业大学园艺园林学院,长沙 410128）
  • 收稿日期:2017-02-16 修回日期:2017-03-11 接受日期:2017-03-13 出版日期:2017-05-26 发布日期:2017-05-26
  • 通讯作者: 揭雨成
  • 基金资助:
    国家自然科学基金项目(31371704)；湖南省耕地重金属污染防治机理研究与技术优化集成课题“重度Cd污染稻田麻类作物替代种植模式研究”；湖南省Cd低积累农作物品种筛选与选育项目“苎麻Cd高吸收品种筛选及配套技术研究与综合利用安全性评价”。

Cadmium Tolerance of Ramie with Different Fineness

Fu Huiqin1,2, Jie Hongdong3, Ma Yushen 1,2, Jie Yucheng 1,2, Xing Hucheng 1,2, Wen Shengxian2   

  1. (1Institute of Ramie, Hunan Agricultural University, Changsha 410128; 2College of Agronomy, Hunan Agricultural University, Changsha 410128; 3Department of Horticulture and Landscape Architecture, Hunan Agricultural University, Changsha 410128)
  • Received:2017-02-16 Revised:2017-03-11 Accepted:2017-03-13 Online:2017-05-26 Published:2017-05-26

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摘要： 旨在了解不同细度品种对重金属Cd耐性的差异性。试验选择长势一致苎麻扦插苗（苗龄60天）进行移栽，土壤Cd胁迫处理分别为0、25、75、150 mg/kg共4个处理，进行为期一整年的Cd耐性试验调查。结果表明：12个不同细度品种苎麻在25 mg/kg土壤Cd胁迫处理下的综合耐性指数在0.80~1.18区间，耐性最好的是中细度品种‘中苎一号’，最差的是低细度品种‘大竹黄白麻’；在75 mg/kg胁迫处理下的综合耐性指数在0.09~0.77之间，表现最好的是中细度品种‘湘苎3号’，最差的是低细度品种‘大竹黄白麻’。在150 mg/kg土壤Cd胁迫处理下的耐性指数在0.32~0.54之间，最好的是高细度品种‘厚皮种一号’，最差的是低细度品种‘大竹黄白麻’。由此可知，苎麻对重金属Cd具有很好的耐受能力，且呈现出中、高细度品种的Cd耐性大于低细度品种。75 mg/kg Cd胁迫浓度是待测品种‘大竹黄白麻’、‘宁乡冲天炮’、‘浏阳大叶青’、‘邻水青顶家麻’、‘川苎八号’、‘中苎一号’、‘武岗红皮麻’、‘湘饲纤兼用一号’苎麻的耐Cd阈值。150 mg/kg Cd胁迫浓度是待测品种‘湘苎三号’、‘多倍体一号’、‘资兴麻’、‘厚皮种一号’的耐Cd阈值。

关键词: 中国荷斯坦奶牛, 中国荷斯坦奶牛, 泌乳性状, TBX21基因, SNP, 关联分析

Abstract: In order to understand the difference of ramie cultivars with different fineness in tolerance to heavy metal cadmium, the tolerance of 12 ramie cultivars under different cadmium stress was studied by soil cultivation pot experiment. Ramies cutting seedlings (60 days) under same growth condition were transplanted to soils treated with 0, 25, 75, 150 mg/kg Cd, respectively. The Cd tolerance experiment lasted for 1 year.The results showed that the comprehensive tolerance index of Cd for these 12 investigated ramies under a Cd stress at 25 mg/kg was range from 0.80~1.18, with the best and worst Cd tolerance shown by “Zhongzhu 1# (medium fineness) ” and “Dazhu Huangbaima(low fineness)”, respectively; and under a Cd stress at 75 mg/kg was range from 0.09~0.77, with the best and worst Cd tolerance shown by “Xiangzhu 3# (medium fineness) ” and “Dazhu Huangbaima(low fineness)”, respectively; and under a Cd stress at 150 mg/kg was range from 0.32~0.54, with the best and worst Cd tolerance shown by “Houpizhong 1# (high fineness) ” and “Dazhu Huangbaima(low fineness)”,respectively. Our results indicating that ramie has good tolerance to heavy metal Cd, with greater Cd tolerance of medium and high fineness cultivars than that of low fineness. The concentration of 75 mg/kg (Cd/soil) is the threshold of cultivars named “Dazhu Huangbaima”,“Ningxiang Chongtianpao”, “Liuyang Dayeqing”, “Lingshui Qingdingjiama”,”Chuanzhu 8#”, “Zhongzhu 1#”, “Wugang Hongpima” and “Xiangsi 1#”; and 150 mg/kg (Cd/soil) is the threshold of cultivars named “Xiangzhu 3#”, ”Duobeiti 1#”, “Zixing Ma” and ”Houpizhong 1#”. Key words: ramie; cultivar; fiber fineness; cadmium tolerance; threshold