Apomeiotic pollen mother cell development in the apomictic Boechera species

Autor:	Kemal Melih Taşkin, Kenan Turgut, Roderick J. Scott
Rok vydání:	2009
Předmět:	Boechera biology fungi Callose Plant Science Horticulture biology.organism_classification medicine.disease_cause chemistry.chemical_compound medicine.anatomical_structure Meiosis chemistry Apomixis Pollen Botany medicine Ploidy Nucleus Cytokinesis
Zdroj:	Biologia plantarum. 53:468-474
ISSN:	1573-8264 0006-3134
DOI:	10.1007/s10535-009-0087-y
Popis:	Pollen mother cell (PMC) development in the apomictic Boechera species B. holboellii, B. gunnisoniana and B. divaricarpa were investigated by various cytological methods. In prophase I, in triploid species B. holboellii and B. gunnisoniana the individual chromosomes condensed into long strands within the nucleus. Then, in metaphase I, each PMC formed a restitutional nucleus thereby bypassing the rest of the first meiotic division. This is interpreted as representing apomeiosis. Subsequently, the restitution nuclei underwent a single cytokinesis as evidenced by the production of dyads. The cells within each dyad were separated by a callose wall. Most of the PMC in B. holboellii and B. gunnisoniana produced dyads, but a small proportion generated conspicuous tetrads. In contrast, diploid apomict B. divaricarpa produced only tetrads by simultaneous cytokinesis.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::92e2df97deaa1e87dc6a894a55e4dd85 https://doi.org/10.1007/s10535-009-0087-y Zobrazit plný text záznamu Full text from SpringerLink