एक स्पोरैंगियम के भीतर उत्पादित चार असाधारण बीजों में से एक

tetraspore's Usage Examples:

Mottier's observation has been confirmed by Lloyd Williams, who has shown, moreover, that the single number occurs in germlings from the tetraspore, and also in the adult stages of all sexual plants, while the double number occurs in germlings from the oospore, and in adult stages of all asexual plants.

Mottier first observed that a reduction in the number takes place in the mother-cells of the tetraspore.

From this it would seem that in this plant reduction takes place in the tetraspore mothercell, and that the tetrasporiferous plants are sporophytes which alternate with sexual plants.

It is possible, however, that the tetraspore formation should be regarded as comparable with the prolific vegetative reproduction of Bryophyta, and in favour of this view there is the fact that the tetraspores originate on the thallus in a different way from carpospores with which the spores of Bryophyta are in the first place to be compared; moreover, in certain Nemalionales the production of tetraspores does not occur, and the difficulty referred to does not arise in such cases.

tetraspore's Meaning':

one of the four asexual spores produced within a sporangium