Reproduction of, and ultrastructural changes induced by,Spiroplasma citri in sieve tube of citrus leaves E. C. K. Igwegbe OriginalPaper Pages: 215 - 229
The structure of the flagellar apparatus of the swarm cells ofPhysarum polycephalum M. WrightA. MoisandL. Mir OriginalPaper Pages: 231 - 250
The salivary gland secretions of a neotropical bumblebee Maria Luiza S. MelloB. C. Vidal OriginalPaper Pages: 251 - 265
Wall morphogenesis in diatoms: Deposition of silica by cytoplasmic vesicles Anna -Maria M. SchmidD. Schulz OriginalPaper Pages: 267 - 288
Structure of the nucleoli of developing microsporangiate strobili and root tips of scotch pine Sirkka Kupila-AhvenniemiAnja Hohtola OriginalPaper Pages: 289 - 301
Crystallographic aspects of sub-elementary cellulose fibrils occurring in the wall of rose cells culturedin vitro H. ChanzyK. ImadaF. Barnoud OriginalPaper Pages: 303 - 316
Temporal movement of digestive vacuoles in fedTetrahymena pyriformis GL-9 T. R. Ricketts OriginalPaper Pages: 317 - 322
Meiotic prophase in diploid and tetraploid strains ofAllomyces macrogynus B. BorkhardtL. W. Olson OriginalPaper Pages: 323 - 343
Behaviour of the chrysoflagellate alga,Dinobryon divergens, during lorica formation W. Herth OriginalPaper Pages: 345 - 351
The life cycle ofAcetabularia (Dasycladales, Chlorophyceae): A compilation of evidence for meiosis in the primary nucleus H. -U. Koop OriginalPaper Pages: 353 - 366
Side branch formation and orientation in the caulonema of the moss,Funaria hygrometrica: Normal development and fine structure G. SchmiedelE. Schnepf OriginalPaper Pages: 367 - 383
The absence of cytoplasm ribosomes on the envelopes of chloroplasts and mitochondria in plants: Implications for the mechanism of transport of proteins into these organelles Gloria ChepkoJessie S. WeistropM. M. Margulies Brief Report Pages: 385 - 392
