Microsporogenesis,Male Gametogenesis and Pollen Morphology of Gonocaryum lobbianum

doi:10.7525/j.issn.1673-5102.2017.02.004

Abstract

Abstract: We studied the microsporogenesis, male gametogenesis and pollen morphology of Gonocaryum lobbianum using light microscopy and scanning electron microscopy to enrich the embryological and palynological data of Cardiopteridaceae s.l. The main results are as follows:(1) The anther is tetrasporangiate; (2) The anther wall comprises the epidermis, fibrous endothecium, ephemeral middle layer and secretory tapetum with 2-4 nuclei in each cell; (3) The microspore mother cell undergo meiosis, cytokinesis is simultaneous and the tetrads are tetrahedral; (4) The mature pollen grains are two-celled; (5) The pollen grains are cryptoaperturate with three pores and the extin is reticulate. The characters of microsporogenesis and male gametogenesis of Gonocaryum are similar to those of Cardiopteris with a little difference. G.lobbianum is almost the same as the other species in the pollen morphological characters.

Key words: Gonocaryum lobbianum, microsporogenesis, male gametogenesis, pollen morphology, Cardiopteridaceae s.l.

CLC Number:

S667.5

KONG Dong-Rui, LI Lu. Microsporogenesis,Male Gametogenesis and Pollen Morphology of Gonocaryum lobbianum[J]. Bulletin of Botanical Research, 2017, 37(2): 181-184.

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