Ghent University
Modern pteridophyte research at Ghent University started with the investigation of stomata types by Van Cotthem.
Subsequent micromorphological studies produced contributions on indument characters and perispore traits in various families, as well as publications on taxonomic and floristic aspects.
Website: http://www.pteridology.ugent.be/
See: Ugent
by DJ Carr and SGM Carr
in Australian Journal of Botany 38(1) 45 – 52 (1990)
Full text doi:10.1071/BT9900045 – © CSIRO 1990
Abstract
Adult leaves of the species of five groups of Eucalyptus, previously thought to be related on grounds of comparative morphology, especially of the flower, are shown to have stomatal complexes conforming to the type, rare among angiosperms, known as staurocytic.
They develop from anisocytic complexes, typical of the seedling leaves. Adults leaves of many of the species have complexes with mostly four or five subsidiary cells. The spectrum of frequencies of subsidiary cells may be characteristic of individual species.
See: CSIRO
by Lalita Kakkar and G. S. Paliwal
See: http://www.new1.dli.ernet.in/data1/upload/insa/INSA_1/20008281_55.pdf
by Hashemloian B. D., Azimi A. A. (2014)
Babak Delnavaz Hashemloian, Azra Ataei Azimi,
===
in Journal of Plant Sciences. 2(6): 334-338. – doi: 10.11648/j.jps.20140206.21
Abstract
The present investigation describes abnormal stomata and cytoplasmic connections between guard cells of neighboring stomata in mature leafs of six species of the monocots.
The study is made on leaves of Amaryllis reticulate L. Her., Narcissus pseudonarcissus L., Iris langport Wern., Crocus sativus L., Ixiolirion tataricum (Pall.) and Allium cepa L.
Anomocytic stomata type was observed in all species. Several stomata abnormally include single guard cells, aborted guard cells arrested developments and cytoplasmic connection between guard cells of neighboring stomata was common to all species except in Allium cepa wasn’t observed cytoplasmic connection.
by Gabriel y Galán J. M., Prada C., Rolleri C. H., Lahoz-Beltrá R., Martínez-Calvo C. (2011)
José María Gabriel y Galán, Carmen Prada, Cristina H. Rolleri, Rafael Lahoz-Beltrá, Cristina Martínez-Calvo
in Rev. Biol. Trop. 59 (1): 403-415. Epub 2011 March 01
Abstract
Morphological stomatal traits, such as size, form and frequency, have been subject of much literature, including their relationships with environmental factors. However, little effort have focused on ferns, and very few in the genus Blechnum. Stomatal length, width and frequency (as stomatal index) of a number of specimens of fourteen Neotropical species of Blechnum were measured in adult pinnae.
The aim of the work was to find biometrical relationships between stomatal traits and between stomatal traits and habit, habitat and ecosystem of the plants. Statistical analyses of data were conducted using Exploratory Data Analysis and Multivariate Statistical Methods.
Stomatal length and width showed a very high correlation, suggesting an endogenous, genetic control, thus giving these traits a considerable diagnostic utility.
With respect to the relationships between stomatal traits and environment, we found significant statistical relationships between altitude and stomatal index. We also addressed the interpretation of the ecological- selective significance of various assemblages of stomatal traits in a diverse conjunction of habits, habitats and ecosystems. .
Ann. Bot. (1979) 44 (2): 249-251
Photo credit: Google
Marattiaceae Angiopteris evecta
by Rolleri C., Deferrai A., Lavall M. C. (1991)
CRISTINA ROLLERI, AMELIA DEFERRARI, MARIA DEL CARMEN LAVALLE,
Laboratory of Botany, Museo de La Plata, Paseo del Bosque, 1900 La Plata, Argentina
in American Fern Journal 81(2]: 44-62 (1991)
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This is a study of adult epidermis morphology in 17 species of Angiopteris Hoffm., Danaea J. E. Smith, and Marattia Swartz.
Epidermal patterns, adult stomata, indument, and idioblasts were studied. Hill and Camus (1986) made an overview of characters of some extant species of Marattiales as part of a cladistic study of extant and fossil members of the order. The epidermal characters they used were subsidiary cells of the stomata, dimensions of the stomata, walls of epidermal cells, and idioblasts. The only character of indument they included in their study was the presence or absence of scales.
Rolleri et al. (1987) made the first detailed study dealing with pinna and pinnule indument in the Marattiaceae, although Holttum (1978) had made some general comments on petiole and rhizome scales of Angiopteris, illustrating two species. He suggested that Angiopteris pinna trichomes were diagnostic but needed detailed study.
Rolleri et al. (1987) strongly pointed out that epidermal characters are diagnostic at the species level in the Marattiaceae and speculated on generic affinities within the Marattiales.
by Sen K., Mukhopadhay R. (2013)
in Bioresearch Bulletin. 2013 Oct 17 [last modified: 2013 Oct 17]. Edition 1.
ABSTRACT
Background:
Cheilanthes is a large and diverse genus with 150 species having worldwide distribution. In India, Cheilanthes is represented by about 27 species. The delineation of one species of Cheilanthes from the other is sometimes difficult on the basis of visible morphologiocal characters alone.
Observation:
In the present paper, mature stomatal morphotypes, venation pattern, epidermal characteristics including hairs and scales, farinose characters, sporangial and spore characters of five species of Cheilanthes viz., C. albomarginata Clarke, C.argentea (Gmel) Kunze, C. chrysophylla Hook., C. rufa D. Don and C. pseudofarinosa (Ching & S.K.Wu) Iwats have been studied under light and Scanning Electron Microscope to bring out their more finer differences which will help delineation of the members easily.
Read the full paper: Bioresearch Bulletin
by Mickel J. E. (2012)
James E. Mickel
in Journal of the North Carolina Academy of Science, 128(3/4), 2012, pp. 95–99
Abstract:
Apical regions of developing aerial shoots of Psilotum nudum (L.) Beauv. were studied using both scanning electron microscopy (SEM) and light microscopy (LM) with the aim of improving our understanding of early stages in stomatal and epidermal ontogenesis.
SEM samples were fixed in gluteraldehyde, critical point dried, and coated with an Au-Pd alloy. LM samples were fixed in FAA and embedded in paraffin. LM sections were stained with 0.05% toluidine blue for protein.
SEM shows that P. nudum stomata develop from 20 mm-long domed meristemoid cells into guard cell mother cells (GMCs). A furrow dividing guard cells develops at 30 mm long, and wax deposition that will cover the entire cell begins at 70 mm long.
LM longitudinal sections of GMCs show a cytoplasmic protein net that organizes into radial fibers, similar to reports of actin fibers in stomata of angiosperms.
This study provides additional details of stomatal development in Psilotum and is the first report of an actin-like protein net in Psilotum.
by Ray, F. Evert
Stomata on pp. 221- 230
Wiley
PLANT STOMATA ENCYCLOPEDIA 
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