巴拉圭西番莲亚属(西番莲，西番莲科)三种植物的小孢子发生

Q3 Agricultural and Biological Sciences

Darwiniana Pub Date : 2016-07-31 DOI:10.14522/DARWINIANA.2016.41.680

Claudia Diana Pereira Suhsner, A. I. Honfi, M. S. Ferrucci, N. B. Deginani

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引用次数: 1

摘要

对巴拉圭瓜伊拉地区的西番莲属植物进行了核学研究。本文首次报道了小叶姜和小叶姜减数分裂2n = 9II期的染色体数目。edulis Sims (2n = 9II)的染色体数目也得到了证实。所有研究物种的减数分裂行为正常，染色体分离规律。在减数分裂II期，很少观察到染色体的迟滞性和非同步性，但花粉活力较高，在78.83% ~ 98.6%之间。所得结果证实x = 9为西番莲亚属的基本染色体数。本研究是对来自巴拉圭的西番莲亚种的细胞遗传学知识的相关贡献。

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Microsporogénesis de tres especies del subgénero Passiflora (Passiflora, Passifloraceae) de Paraguay

The aim of the present study was to characterize karyologically species of Passiflora L. from Felix Perez Cardozo District, Guaira, Paraguay. The chromosome numbers in meiosis 2n = 9II for P. alata Curtis and P. caerulea L. are reported for the first time. Chromosome number for P. edulis Sims (2n = 9II) is also confirmed. Meiotic behaviour in all studied species was normal with regular chromosome segregation. The most frequent chromosome associations were bivalents at diakinesis and metaphase I. Few meiotic irregularities were observed, such as lagging chromosomes and asynchronous phases of meiosis II, however, pollen viability was high, between 78.83% and 98.6%. The obtained results confirms x = 9 as the basic chromosome number for subgenus Passiflora. The present study is a relevant contribution to the knowledge on the cytogenetics of species of Passiflora subg Passiflora from Paraguay.

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来源期刊

Darwiniana Agricultural and Biological Sciences-Plant Science

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

26 weeks

期刊介绍： Darwiniana is a half-yearly botanic publication of the Darwinion Botanic Institute, National Counseling of Scientific and Technical Researches (CONICET) - National Acadamey of Exact, Physical and Natural Sciences. Its mission is to publish original scientific papers and reviews from different areas of the botanical issue with the exception of those which nature are agronomical and applied botanical research (of direct transfer). Main articles are usually included in the following sections: Structure and Development; Reproductive Biology; Ecology and Phytogeography; Etnobotany; Genetics; Systematics and Taxonomy of Vascular Plants; Systematics and Taxonomy of non Vascular Plants.