草地学报 ›› 2016, Vol. 24 ›› Issue (6): 1318-1322.DOI: 10.11733/j.issn.1007-0435.2016.06.024

• 研究论文 • 上一篇    下一篇

70℃干热处理德兰臭草种子内生真菌的研究

施宠, 鲁益, 黄长福, 张蕊思, 安沙舟   

  1. 新疆农业大学草业与环境科学学院 新疆草地资源与生态重点实验室, 新疆 乌鲁木齐 830052
  • 收稿日期:2015-11-10 修回日期:2016-06-29 出版日期:2016-12-15 发布日期:2017-03-18
  • 通讯作者: 安沙舟
  • 作者简介:施宠(1979-),女,河北蠡县人,博士,讲师,研究方向为环境微生物,E-mail:shichong98@163.com
  • 基金资助:

    新疆农业大学草业科学国家重点学科博士研究生创新基金研究项目(XJCYB-2011-01);高等学校博士学科点专项科研基金联合资助课题(20126504110001)资助

Using 70℃ Dry Treatment to Make Endophyte-free Seeds of Melica transsilvanica

SHI Chong, LU Yi, HUANG Chang-fu, ZHANG Rui-si, AN Sha-zhou   

  1. College of Grassland and Environmental Science, Xinjiang Agricultural University, Key Laboratory of Grassland Resources and Ecology of Xinjiang, Urumqi, 830052, China
  • Received:2015-11-10 Revised:2016-06-29 Online:2016-12-15 Published:2017-03-18

摘要:

为了更好地研究内生真菌与德兰臭草(Melica transsilvanica)的互作关系,需获得内生真菌种群已失活的德兰臭草种子。本试验采用70℃干热的方法对德兰臭草带菌种子分别处理5 d,10 d,15 d,20 d,25 d和30 d,以不作处理的种子为对照,通过测定各处理后种子的萌发指标、生长指标和植株内生真菌数量等综合评价内生真菌的灭活效果。结果表明,70℃干热处理能有效杀灭德兰臭草种子中的内生真菌;70℃处理5 d后,与对照相比,宿主染菌率下降为50%;处理25 d时,种子和植株中均未分离出内生真菌。同时,70℃处理25 d时,种子发芽率、发芽势、发芽指数、植株鲜重和胚根、胚芽长度以及植株株高、叶片数、分蘖数、叶宽和茎粗与对照相比均没有显著影响。值得一提的是,70℃干热处理种子可促进植株须根数的增多和根长的增加。综合比较得出,70℃干热处理25 d能使德兰臭草种子中全部内生真菌失活,是一种简单、方便、可行的方法。

关键词: 德兰臭草, 内生真菌, 高温处理, 效果评价

Abstract:

In this study a dry-heat treatment was used to make endophyte-free populations of Melica transsilvanica. The elimination effects of the seed containing endophyte were tested by treatment at 70℃ for 5 d,10 d,15 d,20 d,25 d and 30 d, and the seeds not treated were used as control. The result showed that at 70℃ for 25 d was effective in killing the endophyte in the seeds. The endophyte was very sensitive to the dry-heat treatment, the endophyte infection rate was reduced to 50% after 5 d treatment, and the endophyte infection rate was reduced to 0 after 25 d treatment. At the same time, there are no obvious differenrces in the seeds germination rate and plant growing indexes. Intriguingly, 70℃ dry treatment can promoting root number and root length. Therefore, 70℃ for 25 d treatment was an simple, convenient and feasible way to make endophyte-free M. transsilvanica germplasm.

Key words: Melica transsilvanica, Endophyte, Dry-heat treatment, Effectiveness evaluation

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