Leaf structure of Stevia cinerascens Sch. - Bip. (Compositae)
DOI:
https://doi.org/10.5902/2179460X25475Abstract
Leaves of odorous plants (sample A) and no odorous ones (sample B), showing diverse habits and growing in different habitats were studied. Clarified leaves were used for the blade architecture study and sections of alive and fixed leaves for the anatomical study. The determination of occupied area by epidermal cells, stomata and trichomes according to the stereological method was done. The structure of leaves is dorsiventral. They are amphistomatic with anomocytic stomata. The trichomes are simples conical, simple filiforme and biseriate vesicular glandular types. The venation is acrodromous. The vascular bundles have a collateral arrangement. The bundle sheath of the small vascular bundles located in the mesophyll is parenchymatic. The vessel members have simple perforation plates. Schizogenous secretory canals accompany the primary veins and sometimes the secondary veins. The collenchyma is present beneath the epidermis of the larger veins. The biseriate vesicular glandular trichomes differentiation, subtype α (sample A) and subtype β (sample B) and features frequent in sun (sample A) and shade leaves (sample B) are structural variation showed by these leaves.
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CUTTER, E. Plant anatomy: experiment and interpretation, London, Addison-Wesley Publ., v.2, 1971. 343 p. il.
CUTTER, E. Plant anatomy, Part I Cells and tissues. 2.ed., Great Britain, Edward Arnold, v.1, 1978. 315 p. il.
ESAU, K. Anatomy of seed plants, 2.ed., New York, John Wiley & Sons, 1977. 550 p. il.
FAHN, A. Plant anatomy. Oxford, Pergamon Press, 1972. 534 p. il.
FOSTER, A.S. Techniques for study of venation patterns in the leaves of Angiosperms. In: International Congress, 7,Stockolm, 1950. Proceedings... Stockolm, 1953:586-7.
HICKEY, L.J. Classification of the architecture of dicotyledoneous leaves. Am. J. Bot. 60(1):17-33,1973.
IFJU, G. Quantitative wood anatomy - a stepeological approch. Blacksburg, VPI, IPT, 1977. 26 p.
JOHANSEN, D.A. Plant microtechnique, New York, Mc Graw-Hill Book, 1940. 523 p.
MONTEIRO, R. Estudos taxonômicos em Stevia série Multiaristatae no Brasil. Revta brasil. Bot. 5:5-15,1982.
RAMAYYA, N. Studies on the trichomes of some Compositae. I General structure. Bull. Bot. surv. India. 4(1-4):177-88, 1962.
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