Protoplasmic changes during stomatal development in Bryophyta

 

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Funaria hygrometrica

Protoplasmic changes during stomatal development in Funaria.

by Sack F. D., Paolillo D. J. (1983)

Fred D. Sack, D. J. Paolillo Jr.

in Canadian Journal of Botany, 61: 2515–26 – https://doi.org/10.1139/b83-275 – 

http://www.nrcresearchpress.com/doi/abs/10.1139/b83-275

ABSTRACT

Key protoplasmic features of stomatal development in Funaria hygrometrica Hedw. (Musci) were characterized using light and electron microscopy.

Endoplasmic reticulum (ER) cisternae are initially rough and often arranged in parallel arrays. During pore formation, the cytoplasm becomes packed with tubular, smooth ER.

Older but still functional stomata contain small amounts of primarily cisternal ER. Lipid bodies decrease in electron density when tubular ER appears.

Preliminary observations indicate that two large vacuoles occupy the polar regions of open, but not closed, stomata.

Intact plasmodesmata occur in developing but not mature walls. Plastid structure, microtubule distribution, and other protoplasmic features are essentially similar to those described in the stomata of other genera.