Structure, delimitation, nomenclature and classification of stomata

 

Structure, delimitation, nomenclature and classification of stomata.

by Prabhakar M. (2004)

Malvey PRABHAKAR, Department of Botany, Osmania University, Hyderabad, India

in Acta Bot Sinica, 2004; 46(2): 242–252. – Line drawings showing types. –

http://www.jipb.net/.%5Cpubsoft%5Ccontent%5C2%5C3515%5Cx020210.pdf

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Abstract:

The paper reviews stomatal types observed in 500 species of angiosperms besides those described in the literature and deals with the problems of their structure, delimitation, nomenclature and classification.

In view of the varied definitions available in the literature for subsidiaries, stomatal types and, the definition and delimitations being variously interpreted by different workers, a modified definition for the subsidiaries and stomata is presented.

In accordance with the international code of nomenclature for plants, the names of the stomata widely in use are retained (rule of priority). They have been presently classified as pericytic, desmocytic, paracytic, diacytic, anisocytic, anisotricytic, isotricytic, tetracytic, staurocytic, anomocytic, cyclocytic and a good number of varieties under each type are presented.

These stomatal types are recognised on the basis of their structure rather than its ontogenetic pathways.

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Figs. 63-122. 63-90. Desmocytic stomata. 63. Stomata with distinct subsidiary. 64. Stomata with indistinct subsidiary. 65, 66. Subsidiary transversely oriented to guard cells. 67, 68. Subsidiary parallelly oriented to guard cells. 69, 70. Subsidiary obliquely oriented to guard cells. 71-78. Subsidiaries 1 1/2 cyclic. 79-89. Subsidiaries dicyclic. 90. Subsidiaries tricyclic. 91-122. Paracytic stomata. 91. Stomata with distinct subsidiaries. 92. Stomata with indistinct subsidiaries. 93-96. Subsidiaries parallel to the guard cells. 97-101. Subsidiaries transverse to guard cells. 102-103. Subsidiaries oblique to guard cells. 104-112. Subsidiaries 1 1/2 cyclic. 113-120. Subsidiaries dicyclic. 121. Subsidiaries hemitricyclic. 122. Subsidiaries tricyclic.

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Figs. 123-174. 123-147. Diacytic stomata. 123, 124. Stomata with distinct and indistinct subsidiaries respectively. 125, 126. Stomata with unequal subsidiaries. 127, 128. Subsidiaries parallel to guard cells. 129, 130. Subsidiaries transverse to guard cells. 131, 132. Subsidiaries oblique to guard cells. 133, 134, 140-142, 145, 146. Subsidiaries 1 1/2 cyclic. 135-139, 143, 144, 147. Subsidiaries dicyclic. 148-164. Anisocytic stomata. 148. Stomata with indistinct subsidiaries. 149, 150. Stomata with distinct subsidiaries. 151-156. Stomata with one or two distinct subsidiaries. 157. Subsidiaries 1 1/2 cyclic. 158-164. Subsidiaries dicyclic. 165-170. Anisotricytic stomata. 165. Stomata with indistinct subsidiaries. 166, 167. Stomata with distinct subsidiaries. 168, 169. Stomata with one or two distinct subsidiaries. 170. Subsidiaries 1 1/2 cyclic. 171-174. Isotricytic stomata. 171, 172. Stomata with indistinct and distinct subsidiaries respectively. 173, 174. Stomata with one or two distinct subsidiaries.

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Figs. 175-212. 175-186. Tetracytic stomata. 175, 176. Stomata with distinct or indistinct subsidiaries respectively. 177-181. Stomata with one to three distinct subsidiaries. 182, 183. Subsidiaries 1 1/2 cyclic. 184-186. Subsidiaries dicyclic, hemitricyclic and tricyclic respectively. 187-194. Staurocytic stomata. 187, 188. Stomata with distinct and indistinct subsidiaries respectively. 189-191. Stomata with one to three small subsidiary cells. 192-194. Stomata with one to three large subsidiary cells. 195-206. Anomocytic stomata. 195, 196, 202, 203. Stomata with one, three or more radiating subsidiaries. 197, 199. Stomata with one distinct parallel subsidiary. 200. Stomata with two distinct parallel subsidiaries. 201. Subsidiaries hemidicyclic. 204. Subsidiaries parallel to guard cells. 205. Subsidiaries transverse to guard cells. 206. Some subsidiaries parallel to guard cells while other radiating. 207-212. Cyclocytic stomata. 207-211. Subsidiaries monocyclic. 212. Subsidiaries dicyclic.

 

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Published by

Willem Van Cotthem

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

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