二甲戊灵对不同营养状态下的葡萄原管藻生长和光合活性的影响。

Effect of pendimethalin on growth and photosynthetic activity of Protosiphon botryoides in different nutrient states.

作者信息

Shabana E F, Battah M G, Kobbia I A, Eladel H M

机构信息

Botany Department, Faculty of Science, Cairo University, Cairo, Egypt.

出版信息

Ecotoxicol Environ Saf. 2001 Jun;49(2):106-10. doi: 10.1006/eesa.2000.1942.

DOI:10.1006/eesa.2000.1942

PMID:11386723

Abstract

The effect of pendimethalin on the green alga Protosiphon botryoides was investigated. Results indicate that specific growth rate, cell number, chlorophyll a level, and dry weight yield significantly decrease with increasing pendimethalin concentrations, while protein and carbohydrate contents increase significantly. On the other hand, photosynthetic activity decreases whereas dark respiration increases with high pendimethalin concentrations. High doses of pendimethalin exhibited no clear trend with 77 K fluorescence (Fv/Fm). Increasing nitrate and phosphate levels led to a decrease in cell number, chlorophyll a, and dry weight as compared with the control at high doses of pendimethalin. The results obtained revealed that N:P < 1 increases the inhibitory effect of high doses of the herbicide.

摘要

研究了二甲戊灵对绿藻葡萄状原管藻的影响。结果表明，随着二甲戊灵浓度的增加，比生长速率、细胞数量、叶绿素a水平和干重产量显著降低，而蛋白质和碳水化合物含量显著增加。另一方面，高浓度二甲戊灵下光合活性降低而暗呼吸增加。高剂量二甲戊灵在77K荧光（Fv/Fm）方面没有明显趋势。与高剂量二甲戊灵处理的对照相比，增加硝酸盐和磷酸盐水平导致细胞数量、叶绿素a和干重减少。所得结果表明，N:P<1会增加高剂量除草剂的抑制作用。