Acta Botanica 30. (1984)

1984 / 1-2. szám

CONTENTS A critical survey of Planctomyces research (T. Hortobágyi, L. Hajdú) ...................................... 3 Contribution á l’étude du genre Diplasiolejeunea (Spruce) Schiffner, 4. La section Vil­­laumeae P. Tx. (Subgenus Diplasiolejeunea) sur la côte est de Madagascar (P. Tixier) ...................................................................................................................................................... 11 Revision del género Machaonia H. et B. (Rubiaceae) en Cuba (Mayra Fernandez, A. Borhidi) ............................................................................................................................................. 27 Cytological study of stable viable morphological changes appearing in Amaranthus weed populations of maize monocultures (P. Solymosi, T. Pusztai) ............................. 47 Cytological investigation of Scilla bifolia populations in Hungary I. (Z. Kereszty, L. Szi­lágyi) ........................................................................................................................................................ 53 Comparative anatomy of the androecium of male sterile and fertile sunflowers (Helian­thus). (M. Szabó, S. Gulyás, J. Frank) ...................................................................................... 67 Spalial processes in the analysis of vegetation: theory and review (J. Podani) ...................... 75 Plant communities of Cuba, II. The riverside scrub vegetation (A. Borhidi, R. Capote) ... 119 Reproductive allocation in the stages of sandy succession, II. Erigeron canadensis L. Polygonum arenarium W. et К. (Erika Melkó) ....................................................................... 129 Secondary succession in a herbaceus vegetation after deforestation (Maria Papp) ............ 139 Studies on the pH requirement of soil-inhabiting mushrooms; the R-spectra of mushroom assemblages in deciduous forest communities (G. Bohus) .................................................. 155 The microelement content of some submerged and floating aquatic plants (Margit Kovács, I. Nyáry, L, Tóth) ............................................................................................................................... 173 Forced association between nitrogen-fixing bacteria and green alga (I. Gyurján, G. Tóth, I. Turtóczky) .......................................................................................................................................... 187 Phytochrome-mediated control of protein synthesis during germination of fern spores (G. Paless, G. Vida, Anna H. Nagy) .......................................................................................... 191 An altered concept of the model of the binding sites for triazine in Amaranthus retroflexus L. and Senecio vulgaris L. (G. Turcsányi) ................................................................................. 201 3-metoxycarbonylmethylbenzothiazolium bromide as inducing agent for plant cell dedif­ferentiation in vitro (V. Sekerka) ................................................................................................ 205 Concentrations of photosynthetic pigments in a turkey-oak forest and at its edge (Ilona Mészáros) ................................................................................................................................................. 209 Transformations of carotenoids in various drought adapted species during subsequent dry and wet periods (Z. Tuba) ...................................................................................................... 217 Intercellular symbiosis of nitrogen-fixing bacteria and green alga (I. Gyurján, I. Tur­tóczky, G. Tóth, Gy. Paless, N. H. Nghia) ................................................................................... 249 Studies on the microflora of the curative bottom mud of thermal Lake Hévíz (W-Hun­gary) (C. Fernandez) .......................................................................................................................... 257 Special problems in studying phytoplankton associations (Occurrence and ecological evalua­tion of Hyaloraphidium contortum) (К. T. Kiss) ................................................................ 269 Occurrence of Thalassiosira pseudonana Hasle et Heimdal (Bacillariophyceae) in some rivers of Hungary (К. T. Kiss) .................................................................................................... 277 Monosulcate pollen grains of angiosperms from Hungarian Albian sediments (F. Góczán, M. Juhász) ............................................................................................................................................. 289 Morfológia de granos de polen de las Chloranthaceae y Canellaceae cubanas (L. Stuchlick) 321 Adhesion and germination of differently treated maize pollen grains on the stigma (Beáta Barnabás, L. Fridvalszky) .............................................................................................................. 329 Xylotomic examination of some Venezuelan species of the Capparidaceae, I. (K. Babos, I. R. Bermudez, I. J. C. Cumana) .................................................................................................. 333

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