FURTHER STUDIES OF POLLEN-TUBE COMPETITION IN PRIMULA SINENSIS

Further Studies of Antigenic Competition

A striking correlation between the capacity of an antigen to nonspecifically suppress humoral immune responses of subsequently administered antigens which are non-cross-reacting, i.e. to manifest antigenic competition and produce enlargement of spleen size through cell proliferation, was found. Increase in spleen size was always accompanied by a drop in the normal proportion of thymus-derived c...

Pollen Tube Transmitting Tissue: Place of Competition of Male Gametophytes

In angiosperm reproduction, pollen tubes elongate from the stigma through the stylar transmitting tissue to the ovary to deliver the male gametes for fertilization. This article reviews different forms of pollen tube transmitting tracts within the style as well as possibilities for bridging the gap from the transmitting tissue to the ovule. The pollen tube transmitting tissue is the place of po...

Plant polyphenols. 3. Flavonoids in genotypes of Primula sinensis.

Pollen and Pollen Tube Proteomics

Germinated pollen grains form pollen tubes that accomplish rapid polarized growth within female gametophytic tissues in order to deliver the sperm cell to the ovule. This process is essential for successful plant fertilization in vivo. Pollen tubes are considered to be an ideal model system to study tip growth. A more comprehensive understanding of proteins involved in pollen development, germi...

Studies on Self-Sterility II. Pollen-Tube Growth.

353 INTRODUCTION ................................................................. Historical ...................................................................... 354 Pollen-tube growth in artificial media. 356 Attempts to self-pollinate mutilated pistols. 358 Pollen-tube growth in the pistil.. 359 SUMMARY AND DISCUSSION ...................................................... 362 LITERATURE CI...