Kaszab Zoltán (szerk.): A Magyar Természettudományi Múzeum évkönyve 63. (Budapest 1971)
Kováts, D.: Some histological observations on Lihospermum purpureo-coeruleum L. seedlings
I observed fascicular rearrangement types in the radicula —hypocotyl on my research material. Depending mainly on the age of the seedlings, therefore of the stage of development, five types of fascicular rearrangements could be distinguished. The areas, and their development, of the xylem and pith tissues were measured in the several organs. The rate of lignification is the greatest in the hypocotyl, emitting roots, and later becoming the rhizome. Thus the hypocotyl proved to be the thickest organ, with respect to the areal changes of the stele and the cortex, in cross sections of the radicula, the hypcotyl, and the epicotyl, in the several developmental stages. In Lithospérmum purpureo-coeruleum L. the pericambium is multiseriate above the xylem and in some roots also above the phloem. I found in the seedling roots that the number of the pericambial cell rows changes per level, but often not uniform above the two xylem fascicles even at the same level. I am deeply indebted to S. SÁRKÁNY, Professor, and J. STIEBER, Assistant Professor, of the L. Eötvös University of Sciences, for supporting and directing my work, and for their valuable advice. I also thank J. SZUJKÓ-LACZA and G. FEKETE, the leaders of our research team in the Museum, for their help, and Mrs. L. Bucsi for the drawing of the figures. References: CSAPODY, V. (1968): Keimlings-Bestimmungsbuch der Dikotyledonen. Budapest, p. 44. 173. — HEGI, G. : Illustrierte Flora von Mittel-Europa. München. V. Band, 3. Teil. p. 2153-2156. - JODIN, H. (1903): Recherches anatomiques sur les Borraginées. Annales des Sciences Nat. Botanique, Paris, 17: 263 — 346. — KAUSSMANN, B. (1963): Pflanzenanatomie. Jena, p. 429—443. — METCALFE, C. R. & CHALK, L. (1950): Anatomy of the Dicotyledons. Oxford, p. 945-954. — PRÉCSÉNYI, I., FEKETE, G. & SZUJKÓ-LACZA, J. (1967): Pattern studies in Quercus pubescens wood. Acta Bot. Hung., 13: 277-298. - SÁRKÁNY, S. (1934) : Szállítószövet-rendszer kifejlődése a Ricinus communis szárában. Pécs, partly Bot. Közi. vol. 31. — SÁRKÁNY, S. (1937): Szövetfejlődéstani vizsgálatok az Aristolochia sipho szárában. Bot. Közi., 34: 120-140. - SÁRKÁNY, S. & SZÁLAI, I. (1964): Növényszervezettani gyakorlatok. Budapest. — SOLEREDER, H. (1899): Systematische Anatomie der Dicotyledonen. Stuttgart, p. 627-635. — Soó, R. (1963): Fejlődéstörténeti növényrendszertan. Budapest. — STIEBER, J. (1963) : A gesztenye szövettana, in Jávorka, S. & Maiiga, P. (1963): A gesztenye; Castanea sativa Mill. Budapest. Magyarország Kultur flórája, 7: 45—58. — SZUJKÓ-LACZA, J. & FEKETE, G. (1971): The Correlation of Species and Habitat Factors in a Xerothermic Oak Forest (Orno-Quercetum) Stand. Feddés Repert. 82:259—281. - WETTSTEIN, R. (1935): Handbuch der Systematischen Botanik. Leipzig und Wien, p. 888 — 891. — ZÓLYOMI, B. (1963): Synökologische Untersuchung einer Basiphil-Kalziphilen IndikatorWaldpflanze (Lithospérmum purpureocoeruleum). Acta. Bot. Hung., 9: 461—472. Explanation o£ Plates Plate I Seedlings habits: Fig. 1 = Radicula commencing to grow in the young (about 4—5 days old) seedling. Germination epigeous (magnification x 20); Fig. 2 = Radicula strongly lengthened in the (about 9 — 10 days) old seedling. Hypocotyl also strikingly thickened (xlO); Fig. 3 = Hypocotyl of one month old seedlings much thickened, emitting lateral rootlets (x5); Fig. 4 = 35 days old seedlings, reared in pots, with developed leaves.
