气生菌丝（二级菌丝）：aerial mycelia；aerial hypha，由基内营养菌丝长出培养基外伸向空间的放线菌菌丝。气生菌丝直生或分枝丝状，较基内菌丝粗和色深。
气生菌丝（aerial mycelium）：又叫二级菌丝，由基内营养菌丝长出培养基外，伸向空间的菌丝，直生或分 枝丝状，较基内菌丝粗。功能：分化形成孢子丝。
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气生菌丝体 aerial mycelium ; aerial hypha
The Agaricus Blazei mycelia growth thick and denseness, irregular edge, well situated of aerial hyphae, the fastest speed of per day(0.762 cm/d) and the shortest germinating time on kernel culture medium which filtered between five culture medium.
对五种原种培养基进行筛选，结果表明，姬松茸在麦粒培养基上菌丝粗壮密集，菌落边缘整齐，气生菌丝量适中，日生长速度最快(0.762cm／d)，萌发时间最短，为1.00天，满瓶时间最快(27.6天)，说明麦粒培养基适合作姬松茸的原种培养基。
参考来源 - 姬松茸吉林省本土化优质高效栽培技术的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
其气生菌丝白色，基内菌丝无色至乳脂或浅粉。
Its aerial mycelium is white, substrate mycelium is colorless to cream or pink.
在一般合成培养基上菌株产生丰富的气生菌丝体。
On general synthetic media, the strain produced abundant aerial mycelia.
担孢子萌发形成的菌丝较为浓密，呈白色短绒状，气生菌丝不明显，生长缓慢。
Mycelia sprouted from single spores were denser, appeared white floss-shaped, had no evident mycelia in the air, the growth was slow.
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