具有非同步减数分裂的无配子 Isoetes coromandelina L.f. (Isoetaceae)

IF 2.1 4区生物学 Q2 Agricultural and Biological Sciences Caryologia Pub Date : 2024-03-15 DOI:10.36253/caryologia-2222

V. Irudayaraj, A. Benniamin, S. Arokia Raj

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引用次数: 0

摘要

这项对南印度泰米尔纳德邦蒂鲁内维利地区的 Isoetes coromandelina L.f（Isoetaceae）的细胞学研究表明，在减数分裂过程中，巨孢子母细胞中存在 22 条单独的染色体和一个片段（n=2n=22+1），而不存在任何二价体。两个巨型孢子之间的细胞混合非常常见，导致形成高比例的流产孢子。正如亚伯拉罕（Abraham）和尼南（Ninan）在喀拉拉邦和卡纳塔克邦所报告的那样，本材料属于无配子类群，具有减数分裂不同步现象。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Apogamous Isoetes coromandelina L.f. (Isoetaceae) with asynaptic meiosis

This cytological study on Isoetes coromandelina L.f (Isoetaceae) from Tirunelveli District, Tamil Nadu, South India shows the presence of twenty two individual chromosomes along with a fragment (n=2n=22+1) during meiosis in megaspore mother cells without the presence of any bivalent. Cytomixis between two megaspores is very common, resulting in the formation of a high percentage of abortive spores. The present material is of an apogamous taxon with asynaptic Meiosis as reported by Abraham and Ninan from Kerala and Karnataka.

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来源期刊

Caryologia 生物-遗传学

CiteScore

1.60

自引率

23.80%

发文量

审稿时长

12 months

期刊介绍： Caryologia is devoted to the publication of original papers, and occasionally of reviews, about plant, animal and human karyological, cytological, cytogenetic, embryological and ultrastructural studies. Articles about the structure, the organization and the biological events relating to DNA and chromatin organization in eukaryotic cells are considered. Caryologia has a strong tradition in plant and animal cytosystematics and in cytotoxicology. Bioinformatics articles may be considered, but only if they have an emphasis on the relationship between the nucleus and cytoplasm and/or the structural organization of the eukaryotic cell.