The pollen’s shape and germination percentage and the bloom progress of five bamboo species were studied. The main results were as follows:The pollen’s feature,which were observed by electron scanning microscope,was...The pollen’s shape and germination percentage and the bloom progress of five bamboo species were studied. The main results were as follows:The pollen’s feature,which were observed by electron scanning microscope,was similar to that of grass family. The pollen with monopolar hole was spherical. The veins of the spore wall was fine or rough granular. Generally,the pollen germination percentage of bamboo was low and it was different between five bamboo species. The highest was 76.5% and the lowest was only 5.3%. The bloom progress showed all these bamboo species bloomed fast in the morning. All the results above provided the basic reference for studying the crossbreeding of the several bamboos and the research of carrying out controlled pollination.展开更多
Embryological characters of Arundinaria simonii f. heterophylla were reported in this article. The anthers were tetrasporangiate in which the cytokinesis of microsporocyte in meiosis was successive type and the produc...Embryological characters of Arundinaria simonii f. heterophylla were reported in this article. The anthers were tetrasporangiate in which the cytokinesis of microsporocyte in meiosis was successive type and the produced microspore tetrads were bilaterally symmetrical. The cells of tapetum layer with dense cytoplasm were secretory type, and they began to degenerate during meiosis division. The mature pollen was trinucleate. The single ovule with parietal placenta was anatropous, double integument and tenuinucellatae. The development of the embryo sac was polygonum type. Generally the florets close to the base of spikelets bloomed earlier than others, and development of both stamens and pistils within a spikelet was synchronized.展开更多
文摘The pollen’s shape and germination percentage and the bloom progress of five bamboo species were studied. The main results were as follows:The pollen’s feature,which were observed by electron scanning microscope,was similar to that of grass family. The pollen with monopolar hole was spherical. The veins of the spore wall was fine or rough granular. Generally,the pollen germination percentage of bamboo was low and it was different between five bamboo species. The highest was 76.5% and the lowest was only 5.3%. The bloom progress showed all these bamboo species bloomed fast in the morning. All the results above provided the basic reference for studying the crossbreeding of the several bamboos and the research of carrying out controlled pollination.
基金supported by National Natural Science Foundation of China(31000294)
文摘Embryological characters of Arundinaria simonii f. heterophylla were reported in this article. The anthers were tetrasporangiate in which the cytokinesis of microsporocyte in meiosis was successive type and the produced microspore tetrads were bilaterally symmetrical. The cells of tapetum layer with dense cytoplasm were secretory type, and they began to degenerate during meiosis division. The mature pollen was trinucleate. The single ovule with parietal placenta was anatropous, double integument and tenuinucellatae. The development of the embryo sac was polygonum type. Generally the florets close to the base of spikelets bloomed earlier than others, and development of both stamens and pistils within a spikelet was synchronized.
