Stomata in Gnetum (Gymnospermae)

Photo credit: Google

Gnetum gnemon

The Stomata of Gnetum

by Maheshwary P., Vasil V. (1961)

in Ann. Bot 25: 313-319.

http://aob.oxfordjournals.org/content/25/3/313

Abstract

Screen Shot 2017-04-17 at 11.10.52

In both Gnetum gnemon and G. ula the stomatal development in the collars and axes of the male and female cones and the outer two envelopes of the ovule is of the haplocheilic type.

Screen Shot 2017-04-17 at 11.14.45

In the leaf some stomata do show parallel subsidiary cells, but they arise from the surrounding epidermal cells and do not seem to have a common origin with the guard cells. This conflicts with earlier accounts and is of interest in relation to the types of stomata met with in other gymnosperms, living and fossil.

Screen Shot 2017-04-17 at 11.17.53

See the text: Ann. Bot.

Advertisements

Published by

Willem Van Cotthem

Honorary Professor of Botany, University of Ghent (Belgium). Scientific Consultant for Desertification and Sustainable Development.

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s