On the occurrence of nuclei in mature sieve elements Ray F. EventJerry D. DavisFrank J. Alfieri OriginalPaper Pages: 281 - 296
Polar transport and accumulation of indole-3-acetic acid during root regeneration by Pinus lambertiana embryos Michael S. GreenwoodMary Helen M. GoldSmith OriginalPaper Pages: 297 - 313
The fine structure of the cells that perceive gravity in the root tip of maize B. E. JuniperAnna French OriginalPaper Pages: 314 - 329
Influence of factors affecting germination on respiration of Phacelia tanacetifolia seeds Shepley S. C. Chen OriginalPaper Pages: 330 - 335
Action of light and gibberellic acid on the growth of excised embryos from Phacelia tanacetifolia seeds Shepley S. C. Chen OriginalPaper Pages: 336 - 340
Electron probe analysis of freeze-substituted, epoxy resin embedded tissue for ion transport studies in plants André LäuchliArthur R. SpurrRaymond W. Wittkopp OriginalPaper Pages: 341 - 350
The proportion of sieve elements in the phloem of some tropical trees J. R. S. LawtonM. J. Canny Short Communication Pages: 351 - 354
Embryogenesis and production of albino plants from cell cultures of Bromus inermis O. L. GamborgF. ConstabelR. A. Miller Short Communication Pages: 355 - 358
Isolierung von Auxinen aus dem Chromatin regenerierender Erbsenkeimlinge G. Fellenberg Kurze Mitteilung Pages: 359 - 361