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中国农学通报

中国农学通报 ›› 2021, Vol. 37 ›› Issue (36): 61-65.doi: 10.11924/j.issn.1000-6850.casb2021-0057

• 林学·园艺·园林 • 上一篇    下一篇

外源硒在魔芋不同生育时期不同器官中的含量变化研究

蔡阳光1,2(), 段龙飞1,2(), 覃剑锋1,2, 陈国爱1,2, 郭邦利1,2, 徐聪1, 杨凉花1,2   

  1. 1安康市农业科学研究院,陕西安康 725021
    2安康市魔芋产业研究院,陕西安康 725021
  • 收稿日期:2021-01-18 修回日期:2021-03-19 出版日期:2021-12-25 发布日期:2022-02-15
  • 通讯作者: 段龙飞
  • 作者简介:蔡阳光,男,1989年出生,安徽池州人,农艺师,硕士,研究方向：魔芋种芋繁育及高产抗病栽培。通信地址：725000 陕西省安康市恒口示范区恒口大道一号 安康市农业科学研究院薯类作物研究所,E-mail： 18729152130@163.com。
  • 基金资助:
    安康市科学技术局“安康市科技局农业科技攻关项目”(AK2019-NYZC-2)

The Content Variation of Exogenous Selenium in Different Organs of Konjac at Different Growth Stages

CAI Yangguang1,2(), DUAN Longfei1,2(), QIN Jianfeng1,2, CHEN Guoai1,2, GUO Bangli1,2, XU Cong1, YANG Lianghua1,2   

  1. 1Ankang Institute of Agricultural Science in Shaanxi Province, Ankang, Shaanxi 725021
    2Ankang Institute of Konjac Industry in Shaanxi Province, Ankang, Shaanxi 725021
  • Received:2021-01-18 Revised:2021-03-19 Online:2021-12-25 Published:2022-02-15
  • Contact: DUAN Longfei

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摘要：

通过在土壤中添加不同浓度外源硒,了解硒对魔芋生长的影响,以及在魔芋生长的不同时期硒在不同器官中的吸收分布情况。试验选用杂交品种‘安魔128’芋鞭作为供试材料,采用盆栽的方式,通过在魔芋根部浇灌不同浓度的亚硒酸钠水溶液,测定各器官在不同生育时期的硒含量。结果发现：（1）在魔芋展叶期,随着硒浓度的增加,各器官硒含量均逐渐增加,表现为球茎>叶柄>叶片。（2）在球茎膨大期,各器官硒含量在不同硒浓度下达到最大值;当硒浓度超过16 mg/kg时,叶片及球茎中硒含量均显著降低,表明高硒处理对植株的生长发育造成了影响。（3）随着硒浓度的增加,叶片、叶柄及球茎中的硒含量均呈现先富集后减少的趋势,在硒浓度为16 mg/kg时达到最大;随着魔芋生长至成熟,叶片及叶柄硒含量均有向球茎转移的趋势。（4）不同生育时期叶片中硒含量是相互影响的,叶柄中硒含量最终由其他途径转移而来,且硒有从其他器官向球茎中转移的趋势。因此,我们认为适于魔芋生长发育及各器官硒含量积累的最适硒浓度范围为≤16 mg/kg,且在魔芋不同生育时期各器官中硒含量之间相互影响和转移。

关键词: 魔芋, 外源硒, 不同器官, 硒含量, 富集转移, 盆栽实验

Abstract:

To study the absorption and transfer of selenium in different organs of konjac at various growth stages by adding different concentrations of exogenous selenium into soil, the hybrid variety ‘Anmo128’ was selected as the material, and a pot experiment was carried out to detect the content of selenium in different organs at different growth stages of konjac by repeatedly watering the root of konjac with sodium selenite solution of different concentrations. The results show that: (1) in konjac leaf-spreading stage, with the increase of selenium concentration, the content of selenium of each organ gradually increases, with an order of bulb > petiole > leaves; (2) in konjac bulbous period, the content of selenium in each organ could reach the maximum value under different selenium concentrations, when the selenium concentration exceeds 16 mg/kg, the selenium content in leaves and bulbs significantly decreases, indicating that the high-selenium treatment could have an impact on the growth and development of plants; (3) with the increase of selenium concentration, the content of selenium in leaves, petioles and bulb shows a trend of accumulation first and then a decrease, and the content reaches the top when the concentration is 16 mg/kg; with the konjac growing to maturity, the selenium content in leaves and petioles presents a trend of transfer to the bulb; (4) the contents of selenium in leaves at different development stages are interactional, the selenium content in petiole is eventually transferred by other ways, and selenium has a tendency of transfer from other organs to the bulb. Therefore, the optimum selenium concentration range for the growth and development of konjac and the accumulation of selenium in each organ is≤16 mg/kg, and the contents of selenium in different organs of konjac at different growth stages have interaction and transfer.

Key words: konjac, exogenous selenium, different organs, selenium contents, enrichment and transfer, pot experiment

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