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首页> 外文期刊>Mycologia >Perithecial development by Gibberella zeae: a light microscopy study.
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Perithecial development by Gibberella zeae: a light microscopy study.

机译：玉米赤霉菌的骨膜发育：光学显微镜研究。

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摘要

Gibberella zeae is the causal agent of head blight, and foot and crown rots of wheat, maize, oats and barley. The developmental sequence of perithecia from homothallic Group II isolates of G. zeae was traced by light microscopy. Cultures induced toform perithecia produced wide hyphae with 2 or more nuclei per cell that gave rise to perithecial initials composed of undifferentiated, uninucleate cells. Neither ascogonia nor antheridia were observed. The ascogenous system arose from cells in the inner wall of the young perithecium and as the perithecium matured, formed a hymenium at the base of the centrum. Apical paraphyses, differentiated from cells in the upper periderm, grew downward and became attached to the hymenium. In the central axis of the perithecium, the ostiole formed from small, darkly-staining, uninucleate cells that differentiated into the periphyses. Once the apical paraphyses were completely developed, typical croziers formed in the hymenium. As the asci elongated, the apical paraphyses collapsed, although their walls remained intact between the asci. Mature asci contained 8, 4-celled ascospores in a biseriate arrangement. The ascus walls were simple with a slight thickening at the tip.
机译：玉米赤霉病是小麦，玉米，燕麦和大麦的头枯病以及脚和冠腐的病因。通过光学显微镜追踪来自玉米的同型II类分离株的皮膜的发育序列。诱导形成包皮膜的培养物产生宽菌丝，每个细胞有2个或2个以上的细胞核，从而产生由未分化的单核细胞组成的包皮膜初始结构。既没有观察到Ascogonia也没有观察到花粉症。虫源系统起源于年轻的皮层内壁的细胞，随着皮层的成熟，在中枢的底部形成了一个处女膜。不同于顶部上皮细胞的顶生植物生长向下并附着在处女膜上。在皮膜的中心轴上，由形成暗红色的小，单核细胞分化为骨膜形成了骨质疏松症。根尖的植物完全发育后，处女膜就形成了典型的crozier。随着腹水的延长，尽管其腹壁在腹水之间保持完好无损，但其顶部的附件却塌陷。成熟的asci包含8个4细胞的子孢子孢子孢子。 cus骨壁很简单，尖端略有增厚。

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