中国茄科天仙子亚族的花粉形态研究

本文作者对国产茄科天仙子亚族6个属、12种植物的花粉，用光学显微镜、扫描电镜和透射电镜观察了它们外壁雕纹、萌发孔的类型以及外壁层次的结构。  本亚族花粉以无萌发孔和三孔沟类型为主，其次为三沟和拟沟类型。根据花粉资料，表明花粉形态特征对于论证该亚族内属的界限和属间系统发育的关系，可以提供重要的依据。

Pollen Morphology of the Subtribe Hyoscyaminae (Solanaceae)

The pollen morphology of 12 species representing 6 genera was exami-ned under the light;  scanning and transmission electron microscope. According to form ofaperture;  sculpture and structure of exine;  the palynological relationships among the 6 gene-ra are discussed.      1.  Scopolia Jacq. (plate 1:1-4)      Pollen grains subspheroidal or irregular;  43.7-49.6 μ in diameter;  nonaperturate;  Exi-ne about 1.2-1.5μ  thick;  verrucate;  with verrucae unequal in size;  spinulose or granular.Stratification indistinct;  with no columella layer visible under TEM.      2.  Anisodus Link et Otto (plate 1: 5-12)      Pollen grains subspheroidal;  43.4-48.7 μ in diameter;  nonaperturate. Exine 1.5-1.8 μthick;  verrucate;  with verrucae unequal in size;  spinulose or smooth.  Stratification indis-tinct under TEM.      3.  Atropanthe Pascher (plate 2: 1-4)      Pollen grains subspheroidai or spheroidal;  triangular-circular in polar view;  oblong inequatorial view;  47.2-49.3 μ ×39.8-47 μ;  3-colpate;  colpi wide or narrow;  colpus membra-nes finely granular. Exine with irregular short-stick sculpture;  2.3μ thick;  distinctly 2-la-yered;  columella layer clearly visible;  sexine thicker than nexine under TEM.      4.  Przewalskia Maxim. (plate 2: 5-8) Pollen grains subspheroidal;  triangular-circular in polar view;  oblong in equatorial view; 39.2-40.3 μ × 36.4-42.8 μ ;  tricolporate;  ora lalongate;  colpus membranes granular. Exi-ne reticulate;  2-layered;  2u thick;  columella layer distinct;  sexine and nexine equal in thick-ness under TEM.      5.  Physochlaina G. Don (plate 2: 9-12; plate 3: 1-12)     Pollen grains polymorphic;  usually subspheroidal;  36.5-39.4μ in diameter;  aperturevarying from nonaperturate (P. macrophylla);  3-4 rugose (P. physaloides) to 3-colporate(P. praealta). Exine 1.5-2μ thick;  reticulate;  smooth or with spinulose or verrucous pro-cesses under SEM;  distinctly 2-layered;  or without stratification;  columella layer differentia-ted or not.      6.  Hyoscyamus Linn. (plate 4: 1-9)      Pollen grains subspheroidal;  circular-triangular in polar view;  oval in equatorial view; 39.9-41.8 μ × 38.7-4.2 μ;  tricolporate. Ora orbicular; colpus membranes finely granularor with striate processes. Exine reticulate or striate-rugulate;  2-2.3μ thick;  distinctly 2-la-yered;  columella layer developed.      The dendrogram (Fig. 1) indicates probable phylogenetic relationships among the sixgenera in the subtribe Hyoscyaminae.