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HISTO-ANATOMICAL RESEARCHES REGARDING SOME SPECIES OF CUPRESSACEAE

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Author(s): LĂCRĂMIOARA IVĂNESCU | C. TOMA | RODICA RUGINĂ

Journal: Scientific Annals of Alexandru Ioan Cuza University of Iasi. New Series, Section 2. Vegetal Biology
ISSN 1223-6578

Volume: 53;
Start page: 34;
Date: 2007;
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Keywords: anatomy | histological characteristics | pedo-climatic conditions

ABSTRACT
The authors investigate the structure of the leaf in 11 different species of Cupressaceae, belonging to the following genera: Juniperus (J. communis L., J. sabina L., J. virginiana L., J. chinensis L. Ph., J. horizontalis Moench.), Thuja (T. orientalis L., T. occidentalis L., T. plicata D.Don (syn. T. gigantea Nutt.), Thuyopsis dolabrata (L. f.) Sieb. et Zucc. and Chamaecyparis (C. lawsoniana (A. Murr) Parl., C. pisifera (S. et Z.) Endl.); some of them have, beyond any doubt, an important medical value. We point out the histological characteristics used to differentiate more easily the species of the same genus under the circumstances when the plants don’t have cones yet. Some of the characteristics of the structure are related to the geographical origin, the age of the photo-assimilator organ and to the pedo-climatic conditions in which these plants grow. We emphasis on the cyto-histological characteristics such as the cuticle, stomata, the secretory ducts, the endoderm and the mesophyll; depending on the structure of the mesophyll, we have destroyed bifacial isofacial leaves and bifacial heterofacial leaves, with normal or reversed dorsi-ventrality.
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