| 北美绿苹果组植物的花粉形态和系统学研究 |
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| 引用本文： | 杨晓红,李育农.北美绿苹果组植物的花粉形态和系统学研究[J].西南农业大学学报,1995,17(1):18-23. |
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| 作者姓名： | 杨晓红 李育农 |
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| 作者单位： | 西南农业大学园艺系，西南农业大学园艺系 重庆 630716，重庆 630716 |
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| 摘 要： | 北美绿苹果组６个种的花粉属中等大小，多为圆球形，个别为长球形，３沟极轴走向，沟中央较宽，没方向渐细，萌发孔３个，环列于３沟之中央，孔沟属Ｎ３Ｐ４Ｃ５型，外壁呈条网纹饰或近于条纹饰。６个种的花粉Ｐ／Ｅ值大小不同，依次为花冠海棠（１．３６５７），窄叶海棠（１．０１２８）、草原海棠（０．９８７７），扁果海棠（０．９８２２）、披针叶海棠（０．９７６９）和粉绿叶海棠（０．９６７４）。其Ｐ／Ｅ值可作为本组植物
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| 关 键 词： | 苹果属 花粉 形态学 系统学 |
A STUDY ON THE POLLEN MORPHOLOGY- AND SYSTEMATICS OF GENUS MALUS SECT. CHLOROMELES (DECNE) REHD. IN NORTH AMERICA |
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| Yang Xiaohong, Li Yunong.A STUDY ON THE POLLEN MORPHOLOGY- AND SYSTEMATICS OF GENUS MALUS SECT. CHLOROMELES (DECNE) REHD. IN NORTH AMERICA[J].Journal of Southwest Agricultural University,1995,17(1):18-23. |
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| Authors: | Yang Xiaohong Li Yunong |
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| Abstract: | The pollen size of species of Sect Chloromeles (Decne)Rehd. in North America is of middle size mostly spherical, some few prolate. Parallel to polar axis are three colpi, wide in the middle but narrow at both ends. Three apertures zoniporate in the center of the colpi. So the colp-orate belongs to the type N3P4C5. Exine sculture striate-reticulate or similar-striate. No specific value among the six species in characteristics of their pollen morphology, but there is specific value of P/E clearly among them. The ratio of P/E value of M. coronaria Mill is very high,but that of M. glaucescens Rehd. is very low,and those of the other 4 species are limited in these 2 species. The P/E value may be regarded as a conference of Sect. Chloromeles in their evolution trend. The order of P/E value from high to low in Sect. Chloromeles Rehd. is from M. chloronaria Mill(1. 3657)-M. angustifolia Michex (1. 01277)-M. ioensis Britt (0. 9877)-M. platycarpa Redh. (0. 9822)-M. lancifolia Rehd. (0. 9769)-M. glaucescens Rehd. (0. 9674). |
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| Keywords: | Malus Pollen electron- microscopic analysis Morphology / chloromeles systematics |
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