摘要
石菖蒲(Acorustatarinowii)抑制藻类的机制除了对光和矿质营养(N、P等)的竞争外,主要是由于石菖蒲根系向水体分泌的化学物质,能伤害和清除藻类(化感作用allelopathiceffect),用培植石菖蒲的水培养藻类,可破坏藻类的叶绿素a,使其光合速率、细胞还原TTC能力显著下降;在荧光显微镜下可看到藻细胞从鲜红色变为淡蓝色,表明石菖蒲对藻类有显著的克制效果,可用于治理富营养化水体中的藻类繁生;通过根系分泌物的提取实验,显示该分泌物对同一受体产生浓度效应,它的浓度阈值为30～45ul/disc。
The inhibitory effect of Acorus tatarinowii on algae growth was studied,in addition to the competitions of light and minerial nutrients between Acorus tatarinowii and algae,the machanism of this inhibitory effect is mainly due to the excretion of some organic substances from the root system and rhizome of Acorus tatarinowii which may injure and abate the algae cells(Allelopathic effect) When the algal cells were treated with cultured water of Acorus tatarinowii ,chlorophyll a was found to be destroyed,and the photosynthetic rate of algae markedly decreased,under fluorescence microscope it was seen that algal cells turned from bright red to bluish green The inhibitory of extract from fresh Acorus tatarinowii on algae was found to have an concentration effect,its threshold of concentration is 30～45ul/disc [
出处
《生态学报》
CAS
CSCD
北大核心
1999年第5期754-758,共5页
Acta Ecologica Sinica
基金
江西省自然科学基金
南昌大学校基金
关键词
石菖蒲
化感
藻类
分泌物作用
Acorus tatarinowii
allelopathy
algae
secreting effect
