论文部分内容阅读
４种绿藻对除莠剂西草净（Ｓｉｍｅｔｒｙｎ）的反应有很大差异，小球藻、羊角月芽藻、衣藻和四鞭藻的ＥＣ＿（５０）（影响浓度）值分别为７００、２５、２７和１１μｇ／Ｌ不同浓度西草净都能影响绿藻的光合作用，浓度为２００ｐｐｍ６时，羊角月牙藻和四鞭藻的光合抑制率分别为９５．３％和９４．０％，但对小球藻几乎无影响，当浓度增至２０００ｐｐｍ时，对小球藻的光合抑制率为８７％。小球藻中活性氧防御物（ＳＯＤ、ＡｓＡ－ＰＯＤ、ＧＲ等）的活性均比衣藻、羊角月牙藻等高几倍到几十倍，显示小球藻对西草净的抗性和忍耐性可能与它细胞内所含的活性氧防御物活性有关，它们的高活性使小球藻在西草净污染后，对体内生成的活性氧（Ｏ＿２、Ｈ＿２Ｏ＿２、Ｏ＿２等）伤害有解毒作用。
The results showed that the four species of green algae differed greatly in their response to the herbicide Simetryn. The EC50 values of Chlorella sp., Campylobacter cloacae, Chlamydomonas reinhardtii and Tetranychid sp. Were 700, Photosynthesis of Chlorophyta at 25, 27 and 11 μg / L of different concentrations could all affect chlorophyll photosynthesis. At the concentration of 200 ppm6, the photosynthetic rate of photosynthetic rate was 95.3% and 94.0%, respectively Almost no effect on the chlorella, when the concentration increased to 2000ppm, the inhibition of the photosynthetic rate of Chlorella was 87%. Chlorella active oxygen defenses (SOD, AsA-POD, GR, etc.) activity than Chlamydomonas reinhardt algae several times to several times higher, showing Chlorella net grass resistance and tolerance Sex may be related to the activity of reactive oxygen species (ROS) contained in the cells. Their high activity causes the Chlorella algae to detoxify the harmful oxygen species (O 2, H 2 O 2, O 2,