摘要
MC RR抑制大型沉水植物苦草 (Vallisnerianatans (Lour.)Hara .)的生长和发育。在 0 0 0 0 1— 10mg/L的浓度下 ,苦草种子的发芽、子叶生长、真叶的形成和生长、不定根的形成和生长以及根毛的生长都受到了一定的抑制作用。当MC RR浓度≥ 0 .1mg/L时 ,处理第 30d ,MC RR对苦草鲜重和第一片真叶的生长有极显著的抑制作用 ,当MC RR浓度为 10mg/L时 。
It is well established that cyanobaceria are able to produce a range of toxic compounds,of which the microcystins are the most commonly known. In recent years,investigation into the toxicity of microcystins have mainly been centred on animals. Some data are available on toxicity to terrestrial plants. Little work has,however, been done on the effects of microcystins on aquatic plants. In recent years,aquatic macrophyte has reduced rapidly due to various reasons. We investigated the effect of MC-RR(from microcystins in Dianchi Lake)on the growth and development of a submergent macrophyte Vallisneria natans. Seeds are bacteria free cultured in MS medium with MC-RR. On day 10,20 and 30,seedlings were taken photographes and seedling length measured. Results are as follows:V.natans are sensitive to microcystin-RR. At the concentration of 0.0001-10mg/L,seed germinaton rate,cotyledon length,leaf length,root length and root hairs declined in varing extent,and fresh mass of plants,the root and leaf formation were inhibited. Over the concentration of 0.01mg/L, fresh mass of plants and leaf length was significantly reduced after 30d treatment. At the concentration of 10 mg/L,the root growth and leaf formation were also inhibited significantly and the root hairs disappeared,the new leaf turned yellow. It can be concluded that MC is harmful to the plant life of Vallisneria natans .
出处
《水生生物学报》
CAS
CSCD
北大核心
2004年第2期147-150,共4页
Acta Hydrobiologica Sinica
基金
中国科学院重大项目 (KZCX1 SW 12 )
国家 973项目 (2 0 0 2CB412 3 0 0 )
国家重大环境课题"滇池蓝藻水华污染控制技术研究"(K99 0 5 3 5 0 1)
中国科学院方向性创新课题 (2 2 0 3 16)
863项目 (2 0 0 2AA60 10 13 )资助
