Some additional experiments on the fertility in Petunia II. An addition to the report on the relation between the soil moisture and the fertility
Yasuda, S.
Bot Mag tokyo 44(519): 191-195
1930
Document Number: 514919
Earlier the author reported [see B. A. 4(4): Entry 11034] that the individual of Petunia which is self-incompatible under wet soil conditions may be fertile to some extent under dry conditions. Since it was recognized that some plants may sometimes reproduce parthenogenetically in consequence of changes of external conditions, the author put Petunia with emasculated flowers under dry conditions; no fruits were produced. Further experiments were done showing that this change of fertility is due rather to the condition of the pistil than to that of the pollen used. Further, it was formerly noticed that the stigma secretion of self-incompatible plants inhibits the germination of pollen of those belonging to the same vegetative line. It was now ascertained that the stylar juice of a self-incompatible plant also inhibits the growth of pollen tubes of plants belonging to the same vegetative line, especially under wet conditions.