Pollen-tube hypertrophy in ovules of Solanum and Lycopersicon following interspecific crosses T. M. Gradziel1M. OkadaD. A. St. Clair OriginalPaper Pages: 147 - 152
Ultrastructural changes in the appendix of the Sauromatum guttatum inflorescence during anthesis H. Skubatz1D. D. KunkelB. J. D. Meeuse OriginalPaper Pages: 153 - 170
Enzymatic isolation of viable nucelli at the megaspore mother cell stage and in developing embryo sacs in Nicotiana tabacum Yan WuChang ZhouH. -Ulrich Koop OriginalPaper Pages: 171 - 175
Abortion and determination of stages for embryo rescue in crosses between sweet-potato, Ipomoea batatas Lam. (2n=6x=90) and its wild relative, I. trifida (H. B. K.) G. Don. (2n=2x=30) José MontMasaru IwanagaKazuo Watanabe OriginalPaper Pages: 176 - 182
A new look at incompatibility relationships in higher plants B. R. TrognitzP. E. Schmiediche OriginalPaper Pages: 183 - 190
The embellum: a newly defined structure in the grass ovule N. BusriG. P. ChapmanJ. Greenham OriginalPaper Pages: 191 - 198
Effects of copper deficiency on pollen fertility and nucleic acids in the durum wheat anther Z. AzouaouA. Souvré OriginalPaper Pages: 199 - 204
Polarity of nuclear and organellar DNA during megasporogenesis and megagametogenesis in Plumbago zeylanica B. Q. HuangS. D. Russell OriginalPaper Pages: 205 - 211
Survival at 20° C and cryopreservation of isolated sperm cells from Zea mays pollen grains P. RoeckelC. Dumas OriginalPaper Pages: 212 - 216