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首页> 外文期刊>Mycologia >Nuclear behaviour during basidiospore germination in Cronartium quercuum f.sp. fusiforme.
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Nuclear behaviour during basidiospore germination in Cronartium quercuum f.sp. fusiforme.

机译：克氏囊菌孢子萌发过程中的核行为。梭形目。

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摘要

Nuclear behaviour during basidiospore germination in C. quercuum f.sp. fusiforme [C. fusiforme] was examined on glass slides and host seedlings using 4,6-diamidino-2-phenylindole staining. Mononucleate basidiospores of C. fusiforme were normally produced following meiosis in the teliospore. However, a subsequent mitotic division often occurred within each basidiospore resulting in a short-lived binucleate condition. Within 1 h after spores were released from the basidium, 1 of the 2 nuclei in mostbasidiospores began to degenerate. Ninety-five percent of basidiospores directly cast from telia onto seedlings of Pinus taeda germinated directly forming thin germ tubes. More than 93% of germ tubes were mononucleate. On glass slides, however, 79% of basidiospores germinated indirectly, forming a secondary basidiospore. During indirect germination, degeneration of the second nucleus occurred quickly without exception. No differences in nuclear behaviour were found between direct and indirect germination on host plants or on glass slides. However, nuclear movement from basidiospores into germ tubes was faster on the pine seedlings than on glass slides.
机译：C. quercuum f.sp.担子孢子萌发过程中的核行为。梭形虫[C. fusiforme]使用4，6-二mid基-2-苯基吲哚染色在载玻片和寄主幼苗上进行了检查。纺锤形减数分裂后通常产生梭状梭状芽胞杆菌的单核basidiospores。然而，随后的有丝分裂通常发生在每个孢子孢子内，导致短暂的双核病。在从孢子中释放出孢子后的1小时内，大多数担子孢子中2个核中的1个开始退化。 95％的担子孢子从telia直接浇铸到taeda taeda的种子上发芽，直接形成细胚芽管。超过93％的胚芽管是单核的。然而，在载玻片上，79％的孢子孢子间接发芽，形成次生的孢子孢子。在间接发芽过程中，第二个核的变性迅速发生，无一例外。在宿主植物或载玻片上的直接和间接发芽之间未发现核行为差异。然而，在松树幼苗上，从担子孢子到胚芽管的核运动比在载玻片上更快。

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