J Syst Evol ›› 1986, Vol. 24 ›› Issue (6): 469-470.

• Research Articles • Previous Articles     Next Articles

Male Gametophyte of Cathaya

Wang Fu-Hsiung, Chen Zu-Keng   

  1. (Institute of Botany, Academia Sinica, Beijing)
  • Published:1986-12-18

Abstract: There are two prothallial cells in Cathaya, but their formation is different from that of the other genera of Pinaceae. A primary prothallial cell is cut off first and the division of this cell gives rise to 2 prothallial cells which remain intact in mature pollen grains. 3-celled pollen grains are formed. The interval between polination and fertilization is about 13 months. The two sperms are different in size.

Key words: Cathaya, male gametophyte