Auxospores are specialised cells in diatoms that are produced at key stages in their cell cycle or life history. Auxospores typically play a role in growth processes, sexual reproduction or dormancy. [1] Auxospores are involved in re-establishing the normal size in diatoms, as successive mitotic cell divisions leads to a decrease in cell size.

This is the formation of eggs or monoflagellated sperms. Fertilization or zygote (auxospore) formation happens when the free-swimming sperms are released from male cells and then find the eggs within the test of the female cell.

Jan 13, 2021 · Auxospores perform two critical functions in the life cycle of most diatoms: (1) as in other sexual organisms, they confer the benefits of genetic recombination to diatom progeny, and (2) restore larger cell size and allow a new cycle of vegetative cell size diminution to commence.

…kind of cell called an auxospore. The auxospore divides, forming two large, vegetative cells, and in this manner the larger size is renewed. In centric diatoms there is marked differentiation between nonmotile female gametes, which act as egg …

The meaning of AUXOSPORE is a reproductive cell in diatoms usually resulting from the union of two smaller cells or their contents and associated with rejuvenescence in cells that have become progressively smaller because of repeated divisions.

Searching for phylogenetically informative features, we re-examined sexual reproduction, auxospore structure and development in the diatom Biddulphia biddulphiana. Several unique or unusual features and processes characterized its sexual reproduction.

An auxospore is a reproductive cell that is produced by a diatom cell that has reached the minimum size for a species. This reproductive cell expands before producing a new frustule. The mean cell size of a population is restored through auxospore formation.

Sep 11, 2006 · We report for the first time auxospore formation by the pennate diatom Fragilariopsis kerguelensis (O'Hara) Hustedt during an iron-induced bloom in the Southern Ocean (EIFEX, European Iron Fertilization EXperiment).

Nov 1, 2017 · The auxospore is a life stage present only in diatoms. It facilitates the growth of a sexual progeny protoplast and subsequent deposition of a large post-sexual cell frustule within its cell wall. The auxospore cell wall structure has long been recognized as important in terms of diatom evolution.

Auxospores perform two critical functions in the life cycle of most diatoms: (1) as in other sexual organisms, they confer the benefits of genetic recombination to diatom progeny, and (2) restore larger cell size and allow a new cycle of vegetative cell size diminution to commence.