【目的】针对《中国观赏竹》、《The Bamboos of the World》等重要专著中广泛使用的翠竹、铺地竹以及黄条金刚竹拉丁学名存在有误问题,校正翠竹、铺地竹和黄条金刚竹这3种地被竹的拉丁学名,并补充描述此3种地被竹的花部特征。【方法】...【目的】针对《中国观赏竹》、《The Bamboos of the World》等重要专著中广泛使用的翠竹、铺地竹以及黄条金刚竹拉丁学名存在有误问题,校正翠竹、铺地竹和黄条金刚竹这3种地被竹的拉丁学名,并补充描述此3种地被竹的花部特征。【方法】对南京林业大学竹园中翠竹、铺地竹和黄条金刚竹的开花样地进行调查,分别测量这3种地被竹盛花期小穗的长度、小花数、小穗轴长度,并在体视显微镜下拍照记录各竹种花器官的形态。【结果】根据3个竹种花器官的形态特征,认为翠竹、铺地竹的花器官形态特征符合苦竹属(Pleioblastus)花特征描述,如花序的类型、小穗的形态、雄蕊的数量等;而与赤竹属(Sasa)有较大差异,如花序着生位置、小花外稃形态、雄蕊数量等;黄条金刚竹的花器官形态与东芭竹属(Sasaella)(也称支笹属)花形态描述一致,表现在花序顶生、小穗具柄、小穗轴节间密被毛、雄蕊6、花柱1、柱头3、羽毛状,颖果。而与苦竹属(Pleioblastus)许多特征差异较大,如花序着生位置;雄蕊的数目等。【结论】翠竹、铺地竹的花器官形态特征不符合Sasa花特征,而符合苦竹属花特征描述。因此,宜将翠竹和铺地竹的拉丁学名订正为Pleioblastus pygmaea和Pleioblastus argenteastriatus。黄条金刚竹的花器官形态与Pleioblastus不符,而与东芭竹属(Sasaella)花形态描述一致。因此,将黄条金刚竹的学名订正为Sasaella kongosanensis‘Aureostriatus’。展开更多
Aim: To observe the cytotoxic effect of the organophosphate insecticide malathion in the reproductive tissues of the earthworms, Eisenia foetida. Methods: Worms were nourished in soil treated with malathion at single ...Aim: To observe the cytotoxic effect of the organophosphate insecticide malathion in the reproductive tissues of the earthworms, Eisenia foetida. Methods: Worms were nourished in soil treated with malathion at single sub-lethal doses of 0, 80, 150, 300 and 600 mg-kg^(-1) soil. (LD_(50) = 880 mg kg^(-1) soil) and evaluated on days 1, 5, 15 and 30 after exposure. The body weights were recorded and male reproductive organs evaluated. Results: Malathion-treated animals showed a significant reduction in body weight in a dose-dependent manner. Malathion treatment modified the disposition of spermatozoa in the basal epithelium of the spermatheca. The Br-deoxyuridine test showed a significant rise in cells in phase S on days 5 and 15. Also, a higher percentage of spermatogonia with fragmented DNA were observed by means of the TdT-mediated dUTP nick-end labeling (TUNEL) technique in the spermatheca of treated animals. Conclusion: Treatment with malathion decreased the body weight and the spermatic viability in spermatheca, altering the cell proliferation and modifying the DNA structure of spermatogonia.展开更多
文摘【目的】针对《中国观赏竹》、《The Bamboos of the World》等重要专著中广泛使用的翠竹、铺地竹以及黄条金刚竹拉丁学名存在有误问题,校正翠竹、铺地竹和黄条金刚竹这3种地被竹的拉丁学名,并补充描述此3种地被竹的花部特征。【方法】对南京林业大学竹园中翠竹、铺地竹和黄条金刚竹的开花样地进行调查,分别测量这3种地被竹盛花期小穗的长度、小花数、小穗轴长度,并在体视显微镜下拍照记录各竹种花器官的形态。【结果】根据3个竹种花器官的形态特征,认为翠竹、铺地竹的花器官形态特征符合苦竹属(Pleioblastus)花特征描述,如花序的类型、小穗的形态、雄蕊的数量等;而与赤竹属(Sasa)有较大差异,如花序着生位置、小花外稃形态、雄蕊数量等;黄条金刚竹的花器官形态与东芭竹属(Sasaella)(也称支笹属)花形态描述一致,表现在花序顶生、小穗具柄、小穗轴节间密被毛、雄蕊6、花柱1、柱头3、羽毛状,颖果。而与苦竹属(Pleioblastus)许多特征差异较大,如花序着生位置;雄蕊的数目等。【结论】翠竹、铺地竹的花器官形态特征不符合Sasa花特征,而符合苦竹属花特征描述。因此,宜将翠竹和铺地竹的拉丁学名订正为Pleioblastus pygmaea和Pleioblastus argenteastriatus。黄条金刚竹的花器官形态与Pleioblastus不符,而与东芭竹属(Sasaella)花形态描述一致。因此,将黄条金刚竹的学名订正为Sasaella kongosanensis‘Aureostriatus’。
文摘Aim: To observe the cytotoxic effect of the organophosphate insecticide malathion in the reproductive tissues of the earthworms, Eisenia foetida. Methods: Worms were nourished in soil treated with malathion at single sub-lethal doses of 0, 80, 150, 300 and 600 mg-kg^(-1) soil. (LD_(50) = 880 mg kg^(-1) soil) and evaluated on days 1, 5, 15 and 30 after exposure. The body weights were recorded and male reproductive organs evaluated. Results: Malathion-treated animals showed a significant reduction in body weight in a dose-dependent manner. Malathion treatment modified the disposition of spermatozoa in the basal epithelium of the spermatheca. The Br-deoxyuridine test showed a significant rise in cells in phase S on days 5 and 15. Also, a higher percentage of spermatogonia with fragmented DNA were observed by means of the TdT-mediated dUTP nick-end labeling (TUNEL) technique in the spermatheca of treated animals. Conclusion: Treatment with malathion decreased the body weight and the spermatic viability in spermatheca, altering the cell proliferation and modifying the DNA structure of spermatogonia.
