Zhu Jun-Ying, Liu Bi-Yun, Wang Jing, Gao Yun-Ni, Ge Fang-Jie, Liang Wei, Zhang Li-Ping, Wu Zhen-Bin
State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan 430072, China.
Huan Jing Ke Xue. 2011 Oct;32(10):2904-8.
The allelopathic influence of Myriophyllum spicatum on chlorophyll content and chlorophyll fluorescence parameters of Microcystis aeruginosa was studied in coexistence condition. Chlorophyll fluorescence parameters included q(N) (non-photochemical quenching), Y II (effective quantum yield), F(v)/F(m) (maximum quantum yield), F'(v)/F'(m) (effective quantum yield of photosystem II photochemistry) and ETR (electron transport rate). During the three days under coexistence condition, chlorophyll content and chlorophyll fluorescence parameters of M. aeruginosa were affected by M. spicatum and presented different sensitivities. Chlorophyll content of M. aeruginosa was significantly inhibited by 20.80% on the second day at 10.0 g/L of M. spicatum (P < 0.05). However, chlorophyll fluorescence parameters of M. aeruginosa decreased earlier and rapider than chlorophyll content. On the first day, q(N) and Y II of M. aeruginosa were significantly inhibited by 15.59% and 13.00% at 5.0 g/L of M. spicatum (P < 0.05), and F(v)/F(m) and F'(v) /F'(m) were declined by 15.87% and 12.07% at 10.0 g/L (P < 0.05), respectively. On the third day, ETR and three parameters based on ETR were affected at all levels of M. spicatum (P < 0.05). The inhibition effects on the photosynthetic activity of M. aeruginosa might be considered as one of the target sites of M. spicatum and chlorophyll fluorescence parameters were more sensitive parameters than chlorophyll content, especially q(n).
在共存条件下，研究了穗状狐尾藻对铜绿微囊藻叶绿素含量和叶绿素荧光参数的化感作用。叶绿素荧光参数包括q(N)（非光化学猝灭）、Y II（有效量子产率）、F(v)/F(m)（最大量子产率）、F'(v)/F'(m)（光系统II光化学的有效量子产率）和ETR（电子传递速率）。在共存条件下的三天里，穗状狐尾藻影响了铜绿微囊藻的叶绿素含量和叶绿素荧光参数，且呈现出不同的敏感性。在穗状狐尾藻浓度为10.0 g/L时，第二天铜绿微囊藻的叶绿素含量显著受到抑制，降低了20.80%（P < 0.05）。然而，铜绿微囊藻的叶绿素荧光参数比叶绿素含量更早且更快地下降。第一天，在穗状狐尾藻浓度为5.0 g/L时，铜绿微囊藻的q(N)和Y II分别显著受到抑制，降低了15.59%和13.00%（P < 0.05），在穗状狐尾藻浓度为10.0 g/L时，F(v)/F(m)和F'(v)/F'(m)分别下降了15.87%和12.07%（P < 0.05）。第三天，在所有穗状狐尾藻浓度水平下，ETR以及基于ETR的三个参数均受到影响（P < 0.05）。对铜绿微囊藻光合活性的抑制作用可能被视为穗状狐尾藻的目标作用位点之一，且叶绿素荧光参数比叶绿素含量更敏感，尤其是q(n)。
