中国松科花粉形态研究

STUDIES ON THE POLLEN MORPHOLOGY OF PINACEAE IN CHINA

本文研究了我国松科(Pinaceae)9属61种的花粉形态,其中有6种进行扫描电子显微镜观察和照相,4种进行透射电子显微镜观察和照相,每属都有代表种的绘图,对该科花粉形态类型、科下的分类及演化问题进行讨论,为本科的亚科、属、种的划分提供孢粉学方面的参考依据。

The present paper deals with studies of the pollen morphology of thefamily pinaceae in China, containing 9 genera: Pinus, Abies, Picea, Cathaya,Pseudolarix, Cedrus, Keteleeria, Tseuga and Larix, and 61 species. The pollengrains of these genera and species were examined all with the light micro-scope, those of some genera and species were examined with scanning and transmision electron microscope. According to the type of sacci, it may be divided into three types: 1. Pollen grains with sacci: Pinus, Abies, Picea, Cathaya, Pseudolarix,Cedrus and Keteleeria. 2. Pollen grains with frill: Tsuga. 3. Pollen grains without sacci and frill: Larix. A Key to the pollen grains of the nine genera of pinaceae 1. Pollen grains with sacci and fill 2. Pollen grains with sacci 3. Boundary line between corpus and sacci distinct, in lateral view their proximal root formed concave corner 4. Pollen size less 110μ, exine 2—3μ thick 5. Exine of proximal root usually not thinning, with frill, re- ticulate of sacci larger .............................Pinus 5. Exine of proximal root usually thinning, without frill, re- ticulate of sacci smaller.............................Pseudolarix 4. Pollen size more 110μ, exine 3—8μ thick 5. Ornamentation of cap vermiculate...................Abies 5. Ornamentation of cap finely granulate............Keteleeria 3. Boundary line detween corpus and sacci indistinct, in lateral view their proximal root not formed concave corner 4. Pollen size more 110μ..........................Picea 4. Polien size less 110μ 5. Sacci not developed, in lateral view reticulate of sacci very indistinct...................................Cedrus 5. Sacci well developed, in lateral view reticulate of sacci mo- re distinct.................................Cathaya 2. Pollen grains with frill..........................Tsuga1. Polleu grains without sacci and frill.................Larix