芥蓝与芸苔属几个常见种花粉形态的比较

本文通过对芸苔属(Brassica L.)几个常见种芥蓝(B. alboglabra Bailey)、芥菜(B.juncea(L. )Coss.)、油菜(B. campestris L.)和花椰菜(B. oleracea var. botrytis L.)等花粉形态的光学显微镜和扫描电镜的观察比较,得知它们的花粉形态特征比较一致。而与杨萍等关于芥蓝的花粉形态特征——无极,具散孔这一报道截然不同;亦与黄增泉(Huang Tseng-chieng)关于芥菜的花粉特征——不具萌发孔的报道不同。作者的研究表明,上述几个种的花粉均具3沟,沟长而明显。外壁具网状纹饰,网眼较粗。但种与种间其花粉大小有所不同。作者不同意杨萍等关于“由于芥蓝的花粉形态与芸苔属其它种的花粉明显区别,说明芥蓝与芸苔属其它种不很亲缘”的观点,而认为,从花粉形态看,芥蓝与芸苔属其它种是基本一致的,把它们置于同一自然类群是合理的。

COMPARISON OF POLLEN MORPHOLOGY OF BRASSICA ALBOGLABRA AND SOME OTHER SPECIES OF THE GENUS BRASSICA

Pollen grains of Brassica alboglabra Bailey, B. campestris L., B. oleracea var. botrytis L. and B. juncea (L.) Coss. were examined under LM and SEM. The result shows that the pollen morphology of those species and varieties above-mentioned is consistent basically, having subsphaeroidal to prolate 3-colpate pollen grains with coarsely reticulate exine sculpture; and the author disagree with Yang Ping etc's view that the pollen grains in Brassica alboglabra are apolar, pantoporate and distinctly different from those of Brassica oleracea etc. of Brassica L.