Journal of
Medicinal Plants Research

  • Abbreviation: J. Med. Plants Res.
  • Language: English
  • ISSN: 1996-0875
  • DOI: 10.5897/JMPR
  • Start Year: 2007
  • Published Articles: 3785

Full Length Research Paper

Effect of quizalofop on protective enzymes and photosynthesis in Radix Isatidis

Wang Xin1,2#, Rong Erhua1#, Zhang Jinhua1,3, Yuan Xiangyang1, Wen Yinyuan1 and Guo Pingyi1*
1Department of Agriculture, Shanxi Agricultural University, Taigu, 030801, Shanxi, China. 2Taiyuan Spark Technology Development Center, Taiyuan, 030009, Shanxi, China. 3Department of Biology Science, Jinzhong College, Jinzhong, 030600, Shanxi, China.
Email: [email protected]

  •  Accepted: 13 January 2012
  •  Published: 09 March 2012


The experiment was aimed to study the effect of Quizalofop on Radix Isatidis (RI) and its response mechanisms, and select a safe and efficient type and concentration of herbicide. With the help of random block methodology to figure out the different doses of Quizalofop effect after spraying, the pattern of the concentration of some protective enzymes were identified, and some photosynthetic characteristics were also measured. Results showed that under different concentrations of Quizalofop treatment, many enzyme activities were changed in response to the time length. The photosynthesis progress of Radix Isatidis was slightly impacted at a low dose. Malondialdehyde (MDA) of Isatis leaf got injured more by Quizalofop when the dose increased. The effect of Quizalofop on the RI leaves was changing with the time after spraying, which showed a trend of declining after increasing. In conclusion, Quizalofop with a low dosage of 225-450 ml/hm2 may affect RI photosynthesis slightly and can be used safely.


Key words: Radix Isatidis, quizalofop, protective enzymes and photosynthesis.