AgResearch Grasslands, Forage Improvement, Palmerston North, New Zealand.
Fungal Biol. 2012 Jan;116(1):42-8. doi: 10.1016/j.funbio.2011.09.007. Epub 2011 Oct 7.
Selected Neotyphodium sp. endophytes are now commonly used to enhance pasture persistence and livestock productivity, with seed of perennial ryegrass and tall fescue cultivars with these selected endophytes being commercially available. In a large population of perennial ryegrass plants infected with a Neotyphodium sp. endophyte that was being grown for seed production a small percentage of inflorescences were distorted and covered with a conspicuous white mycelial growth. Within individual plants only a small number of inflorescences were affected and the amount of distortion differed between affected inflorescences. This Neotyphodium sp. is an interspecific hybrid of Epichloë typhina and Neotyphodium. lolii and like nearly all other Neotyphodium spp is symptomless in host grasses. The fungus isolated from distorted inflorescences had colonies that were identical to those isolated from symptomless inflorescences and these were characteristic of this Neotyphodium sp. This is the first report of distorted inflorescences covered with epiphytic hyphal growth on host grasses infected with an interspecific hybrid Neotyphodium sp.
现在，人们通常会选用特定的 Neotyphodium 内生真菌来提高牧草的持久性和牲畜的生产力，具有这些特定内生真菌的黑麦草和高羊茅品种的种子已经商业化。在一个大型的黑麦草种群中，感染了 Neotyphodium sp.内生真菌的植株正在进行种子生产，一小部分花序变形，并覆盖着明显的白色菌丝体生长。在单个植株中，只有少数花序受到影响，受影响的花序之间的变形程度也不同。这种 Neotyphodium sp.是 Epichloë typhina 和 Neotyphodium lolii 的种间杂种，与几乎所有其他 Neotyphodium spp.一样，在宿主草中无症状。从变形花序中分离出的真菌的菌落与从无症状花序中分离出的菌落完全相同，这些菌落是这种 Neotyphodium sp.的特征。这是首例报告称宿主草上感染种间杂种 Neotyphodium sp.的花序变形，覆盖着附生的菌丝体生长。
