6Frank L, Tong V E. Signaling and the modulation of pollen tube growth[J]. Plant Cell, 1999,11:727 -738.
7Reiss H D, Herth W, Nobiling R. Development of membrane and calcium gradients during pollen germination of Lilium Iongifiorum [J]. Planta,1985 ,163 :84 -90.
8Zhang Y F. Calcium channel and calcium release channel [ J]. Acta Biophysi Sin, 1992,8 735 - 744.
9Kem J, Atkins R E. Free amino acid content of anthers of malsterile and fertile lines of grain sorghum, Sorghum bicolor (L.) Meonch [J]. Crop Sic,1972,12:835 -839.