国产爵床科鳞花草族1属、穿心莲族2属和爵床族8属植物的花粉形态

Pollen morphology of one genus in Lepidagathideae, two in Andrographideae and eight in Justicieae (Acanthaceae) from China

报道了中国爵床科Acanthaceae爵床亚科Ruellioideae鳞花草族Lepidagathideae 1属、穿心莲族Andrographideae 2属和爵床族Justicieae 8属共14种植物的花粉形态。根据花粉萌发孔类型和外壁纹饰特征,可将这些植物的花粉归为4个类型: (1)具3孔沟,外壁具网状纹饰。该类型见于色萼花属Chroesthes (采自广西样品)和穿心莲属Andrographis植物。(2)具3孔沟及假沟(肋条带型)类型,外壁具网状纹饰,网眼纵向排列成行,网眼内有细网纹。该类型见于色萼花属(采自云南样品)和鳔冠花属Cystacanthus。(3)具3孔沟,沟两侧各有1条假沟,外壁具网状纹饰。该类型见于瑞丽山壳骨Pseuderanthemum shweliense、狗肝菜属Dicliptera 和驳骨草属Gendarussa 植物。(4) 具2孔沟, 沟两侧具斑块。该类型见于山壳骨属Pseuderanthemum 1种、纤穗爵床属Leptostachya、鳄嘴花属Clinacanthus、鸭嘴花属Adhatoda、杜根藤属Calophanoides和野靛棵属Mananthes植物。

Pollen grains of one genus in Lepidagathideae, two in Andrographideae and eight in Justicieae in the subfamily Ruellioideae, Acanthaceae, from China were observed under SEM. In the light of the aperture type and exine ornamentation, four types of pollen grains could be identified: (1) 3-colporate pollen with reticulate exine ornamentation. This pollen type occurs in one sample of Chroesthes lanceolata from Guangxi and in Andrographis paniculata. (2) 3-colporate pollen with reticulate exine ornamentation and with ribbed pseudocolpi, with the lumina finely reticulate inside and arranged in longitudinal rows. This pollen type (Rippenpollen) occurs in one sample of Chroesthes lanceolata from Yunnan and in Cystacanthus paniculata. (3) 3-colporate pollen with one pseudocolpus on each side of colpus, and with reticulate exine ornamentation. This pollen type occurs in Pseuderanthemum shweliense, and in Dicliptera and Gendarussa. (4) 2-colporate pollen grains with a row of areolae (insular streaks) on each side of colpus. This pollen type occurs in Pseuderanthemum, Leptostachya, Clinacanthus, Adhatoda, Calophanoides and Mananthes.