Apomixis in Enteromorpha linza

Abstract:

This paper presents the results of apomixis research in Enteromorpha linza. During the life history of Enteromorpha linza, gametophytes can give birth to next generation by apomixis. The apomixes of Enteromorpha linza have two approaches. One is the gamete diffused from gametangia of gametophytes that succeeds in developing into new thallus, the other is the undiffused gamete that develops into new thallus directly. After the diffused gamete settled, it begins the first division and divides into two cells, one is apical cell and the other is basal cell. With the development of germling, it appears apical-basal polarity. The apical cell and basal cell act as the ancestor cells of frond and rhizoid. In another approach, the undiffused gamete can directly develop into germling. Many germlings can get together and settle in the former frond which has died. The apomixes approach of undiffused gamete is the first report.