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中国油料作物学报 ›› 2014, Vol. 36 ›› Issue (5): 602-.doi: 10.7505/j.issn.1007-9084.2014.05.007

• 栽培生理 • 上一篇    下一篇

芽期Al3+胁迫对芝麻幼苗生长的影响及种质资源耐铝毒性评价?

孙 建(1981-),男,江西高安人,硕士,副研究员,主要从事芝麻遗传育种研究,E-mail:whsunjian@aliyun.com, whsunjian@qq.com   

  1. 1 江西省农业科学院作物研究所,江西 南昌,330200;2 国家红壤改良工程技术研究中心,江西 南昌,330200
  • 出版日期:2014-10-28 发布日期:2015-01-12
  • 通讯作者: 乐美旺(1963-),男,江西玉山人,博士,研究员,主要从事芝麻遗传育种研究,E-mail:mwyuecarl@163.com
  • 基金资助:

    国家科技支撑计划(2011BAD41B01);国家芝麻产业技术体系建设(CARS-15-1-04);江西省农业科学院科技创新团队建设基金

Effect of aluminum stress on sesame seedling growth during germination and tolerance evaluation of sesame germplasm

  1.  1. Crops Research Institute, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China;2. National Engineering and Technology Research Center for Red Soil Improvement, Nanchang 330200, China
  • Online:2014-10-28 Published:2015-01-12

摘要:

铝毒害是影响江西省红壤作物生长的重要因素之一,为了解铝对芝麻生长的毒害,发掘耐铝毒种质资源,用Al2(SO4)3•18H2O溶液模拟发芽期Al3+胁迫研究不同浓度Al3+对芝麻品种赣芝9号和赣芝12成苗及幼苗生长的影响。结果表明,Al3+浓度在0~100mg/L时,随着Al3+浓度的增加,成苗率、芽长、根长和苗鲜重均不断下降,且根长下降最为明显;而浓度在250~1 000mg/L时,芝麻难以成苗。Al3+浓度在50mg/L时,成苗率、芽长、根长和苗鲜重等测定指标均急剧下降,因此可认为50mg/L的Al3+浓度胁迫可以作为芝麻种质耐铝毒性筛选鉴定的参考浓度。进而在50mg/L Al3+胁迫下评价96份芝麻种质[含39个改良品种(系)和57份地方种质],可将它们聚为3类,即包含21份的耐铝毒种质、37份的中等耐铝毒种质和38份不耐铝毒种质;发掘出赣芝9号、金黄麻、武宁黑等21份耐铝毒种质。比较分析表明,地方种质资源的平均耐铝毒特性要优于改良品种(系),且除成苗率外,地方种质耐铝毒性的其他指标的变异系数和多样性指数均大于改良品种(系)。

关键词: 芝麻, 种质资源, 红壤, 铝胁迫, 耐铝毒性

Abstract:

Aluminum stress is one of the important factors affecting crop growth on red soil in Jiangxi Province. To understand the aluminum toxicity on sesame growth and exploring germplasm tolerance to aluminum, Al2(SO4)3•18H2O was used to simulate aluminum stress on growth of 2 sesame cultivars Ganzhi 9 and Ganzhi 12 during germination. Seedling survivor rate, shoot length, taproot length and seedling fresh weight, were investigated under 0 to 100mg/L Al3+ solutions. All of the traits were decreased continuously with the increase of Al3+ concentrations, especially the taproot length. All sesame seedlings died in 250 to 1 000mg/L Al3+ solutions. These 4 traits decreased under 50 mg/L Al3+ dramatically, this concentration was then used to identify 96 sesame materials including 39 upgrade varieties and 57 local germplasm. According to their relative values of the 4 traits, materials were clustered into 3 groups: 21 strong tolerant, 37 medium tolerant and 38 susceptive. The 21 tolerant materials, especially Ganzhi 9, Jinhuangma and Wuninghei had potentials in future utilization. Compared to upgraded varieties, local germplasm showed superior tolerances to aluminum stress. Except survivor rate, local germplasm had higher coefficient of variation and diversity index.

Key words: Sesame (Sesamum indicum L), Germplasm, Red soil, Aluminum stress, Aluminum tolerance