1. Effects of paclobutrazol (PP333) on lead and zinc accumulations in <italic>Pseudostellaria maximowicziana</italic>.
- Author
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Liu, Lei, Zheng, Shuling, Chen, Fabo, Li, Jianhua, Liao, Ming’an, Lin, Lijin, Tang, Haoru, Deng, Qunxian, Li, Huanxiu, Wang, Xun, Wang, Jin, Tang, Yi, Li, Mengyao, Zhang, Huifen, and Li, Huaxiong
- Subjects
PACLOBUTRAZOL ,SUPEROXIDE dismutase ,CHLOROPHYLL ,BIOMASS & the environment ,PEROXIDASE genetics - Abstract
Paclobutrazol (PP333) can enhance the resistance capabilities of plants to stress conditions. In this study, PP333 were sprayed on the lead (Pb) and zinc (Zn) accumulator plant
Pseudostellaria maximowicziana , which was planted in Pb-Zn contaminated soil, and the effects of PP333 on Pb and Zn accumulation levels inP. maximowicziana were studied. Spraying 10 mg/L PP333 increased, while 20, 30 and 50 mg/L PP333 decreased, the biomass ofP. maximowicziana compared with the control. The 10 mg/L PP333 had no significant effects on the photosynthetic pigment contents ofP. maximowicziana compared with the control, while the other doses increased the contents. The activities of antioxidant enzymes (superoxide dismutase, peroxidase and catalase) and the Pb and Zn concentrations inP. maximowicziana were increased by PP333 compared with the control. These items had the increase trend with the increase of PP333 concentrations. Only 10 and 20 mg/L PP333 increased the amount of Pb extracted byP. maximowicziana shoots, while all of the doses increased the amount of Zn extracted byP. maximowicziana shoots. Thus, low concentration of PP333 could promote the growth and heavy metal extraction ability ofP. maximowicziana shoots, with the 10 mg/L being the best. [ABSTRACT FROM AUTHOR]- Published
- 2018
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