北日本各地の野生化したペレニアルライグラスとトールフェスクにおけるネオティフォディウム・エンドファイト感染状況と感染個体由来種子のアルカロイド含量 Incidence of Neotyphodium Endophytes among Naturalized Perennial Ryegrass and Tall Fescue Plants in Northern Japan and Alkaloid Concentration of the Seeds from Infected Plants

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Abstract

北日本の道端に生育する野生化したペレニアルライグラスとトールフェスクをそれそれ59と71箇所から各地点3個体ずつ収集してエンドファイト感染状況を調べた。全体では各草種それそれ10%(18/179個体)と15%(32/213個体)が感染しており, 感染個体の平均アルカロイド含有率は, エルゴバリンがそれぞれ1.86 ppmと6.27 ppm, ロリトレムBはPRで1.41 ppmであった。 いずれの草種も感染個体のアルカロイド含有率に大きな変異が認められ,中でも深浦のPR個体はエルゴバリン, ロリトレムBとも検出されなかった。アルカロイド含有率の低い個体が見つかったことは,感染しているエンドファイトの特性を調べることにより, 牧草として利用できる可能性を示すものである。

The incidence of Neotyphodium endophytes was investigated for naturalized perennial ryegrass (Lolium perenne L.) and tall fescue (Festuca arundinacea Schreb.) plants collected from roadsides in northern Japan. Fifty seeds were collected from each of three plants at each site. Ten seeds from each plant were tested for endophyte infection and another 10 seeds from those plants found to be infected were used for the analysis of ergovaline and lolitrem B concentration. Perennial ryegrass was collected from 59 sites and tall fescue from 71 sites. Percentages of infected plants were 10% (18/179) in perennial ryegrass and 15% (32/213) in tall fescue. Average ergovaline concentrations in seeds were 1.86 ppm and 6.27 ppm in peren nial ryegrass and tall fescue, respectively. Average lolitrem B concentration in perennial ryegrass was 1.41 ppm. Concentrations of alkaloids differed markedly among the collected plants. Neither ergovaline nor lolitrem B were detected in seeds from perennial ryegrass plants collected from Fukaura. Existence of infected plants with a low concentration of alkaloid may indicate the possibility of usage as forages by investigating characteristics of the endophyte strains.

Journal

  • Japanese Journal of Grassland Science

    Japanese Journal of Grassland Science 49(5), 444-450, 2003

    Japanese Society of Grassland Science

References:  19

Cited by:  3

Codes

  • NII Article ID (NAID)
    110003849632
  • NII NACSIS-CAT ID (NCID)
    AN10559677
  • Text Lang
    ENG
  • Article Type
    Journal Article
  • ISSN
    0447-5933
  • NDL Article ID
    6901682
  • NDL Source Classification
    ZR7(科学技術--農林水産--農産) // ZR22(科学技術--農林水産--畜産)
  • NDL Call No.
    Z18-344
  • Data Source
    CJP  CJPref  NDL  NII-ELS  J-STAGE  JASI 
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