sporophyte造句
1. Sporogonium The sporophyte generation in mosses and liverworts.
2. In vascular plants the diploid sporophyte is the dominant phase and in the ferns, for example, the gametophyte is a small prothallus .
3. The sporophyte body comprises a long stalk, called a seta, and a capsule capped by a cap called the operculum.
4. If such gametophytes produce fertile gametes, the resulting sporophyte is then tetraploid, and large polyploid series may subsequently be developed. Apospory is found in some mosses and ferns.
4.try its best to gather and create good sentences.
5. The abortion type of these CMS lines is sporophyte abortion.
6. The gametophyte and infant sporophyte morphological development of S. grevilleoides represented very different features on different culture substrata.
7. In lower plants such as mosses and liverworts the persistent vegetative plant is haploid, the sporophyte being a relatively short-lived phase.
8. The term also describes the development of an unfertilized female gamete into the sporophyte, a phenomenon described as PARTHENOGENESIS. See apospory; apomixis.
9. In the presence of water, sperm from the antheridia swim to the archegonia and fertilisation occurs, leading to the production of a diploid sporophyte.
10. Apospory, aposporous The development of a gametophyte directly from a sporophyte without the occurrence of meiosis or spore formation.
11. The haploid plant produces gametes mitotically and is thus termed the gametophytes while the diploid plant produces spores meiotically and is called the sporophyte .
12. Haplobiontic Describing life cycles in which only one type of somatic body is formed, which may be either haploid or diploid, i. e. either the sporophyte or the gametophyte generation is missing.
13. The term also describes the development of an unfertilized female gamete into the sporophyte , a phenomenon described as PARTHENOGENESIS.
14. The spore morphology of Pteris is stable, and the difference between species is distinct , but the features of spore and sporophyte are not related.
15. If such gametophytes produce fertile gametes , the resulting sporophyte is then tetraploid, and large polyploid series may subsequently be developed.
16. So, it is necessary to study whether the sterility of male sterile lines with Ae. bicornis cytoplasm is gametophyte or sporophyte .