The Influence of Tetrad Shape and Intersporal Callose Wall Formation on Pollen Aperture Pattern Ontogeny in Two Eudicot Species

Overview

Journal Ann Bot

Publisher Oxford University Press

Specialty Biology

Date 2010 Aug 6

PMID 20685726

Citations 12

Authors

Beatrice Albert

Sophie Nadot

Leanne Dreyer

Adrienne Ressayre

Affiliations

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Abstract

Background And Aims: In flowering plants, microsporogenesis is accompanied by various types of cytoplasmic partitioning (cytokinesis). Patterns of male cytokinesis are suspected to play a role in the diversity of aperture patterns found in pollen grains of angiosperms. The relationships between intersporal wall formation, tetrad shape and pollen aperture pattern ontogeny are studied.

Methods: A comparative analysis of meiosis and aperture distribution was performed within tetrads in two triporate eudicot species with contrasting aperture arrangements within their tetrads [Epilobium roseum (Onagraceae) and Paranomus reflexus (Proteaceae)].

Key Results And Conclusions: Intersporal wall formation is a two-step process in both species. Cytokinesis is first achieved by the formation of naked centripetal cell plates. These naked cell plates are then covered by additional thick, localized callose deposits that differ in location between the two species. Apertures are finally formed in areas in which additional callose is deposited on the cell plates. The recorded variation in tetrad shape is correlated with variations in aperture pattern, demonstrating the role of cell partitioning in aperture pattern ontogeny.

Citing Articles

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Identification of Candidate Genes Involved in the Determinism of Pollen Grain Aperture Morphology by Comparative Transcriptome Analysis in Papaveraceae.

Mazuecos-Aguilera I, Suarez-Santiago V Plants (Basel). 2023; 12(7).

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A Review of the Developmental Processes and Selective Pressures Shaping Aperture Pattern in Angiosperms.

Albert B, Matamoro-Vidal A, Prieu C, Nadot S, Till-Bottraud I, Ressayre A Plants (Basel). 2022; 11(3).

PMID: 35161338 PMC: 8840023. DOI: 10.3390/plants11030357.

Pollen wall patterns as a model for biological self-assembly.

Radja A J Exp Zool B Mol Dev Evol. 2020; 336(8):629-641.

PMID: 32991047 PMC: 9292386. DOI: 10.1002/jez.b.23005.

Formation pattern in five types of pollen tetrad in Pseuduvaria trimera (Annonaceae).

Li B, Xu F Protoplasma. 2018; 256(1):53-68.

PMID: 29946905 DOI: 10.1007/s00709-018-1282-5.

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