STUDIES ON POLLEN MORPHOLOGY OF TAMARICACEAE IN CHINA
Xi Yi-zhen
1988, 8(3):
23-42.
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The pollen morphology of 30 species and 4 genera of Tamaricaceae in China was investigated by means of LM and SEM, of which one species, Tamarix elongata was observed with TEM. Pollen grains of the family isopolar, radially symmetrical, subspheroidal or prolete, rarely oblete, 3-lobate-circular or rounded- triangular in polar view, ellipsoidal in equato-rial view, 13.9-34.8×13.0-34.8μm in size, 3-colpate, only in a few spe-cies 3-colporoidate, usual colpi long, occasionally almost as long as thepolar axis, and narrow or wide, membrana nearly smooth. Exine 1.5-2μm thick, two layers distinct or indistinct, finely reticulate. The exine ofthe pollen grains in this family under SEM is characterized by coarselynd finely reticulate, and finely perforate, individual species vermiculateprotuberance. TEM reveal that pollen ectexine of Tamarix elongata consistof tectum, columella layer and foot layer, tectum with perforation or semitectum. Columella curved or hanged to the inner surface of tectum andno onnect with the food layer an branched and formed reticulum like structure. Endexine indistinct. The pollen morphology of the family has also been compared withthat of Salix (Salicaceae).
