Effects of lead on growth, osmotic adjustment, antioxidant activity and photosynthetic responses in Phoebe chekiangensis seedlings

Authors

  • Yujie YANG Yangtze University, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Jingzhou 434020, Hubei (CN)
  • Wenjie LI Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)
  • Xinru HE Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)
  • Die HU Yangtze University, College of Horticulture and Gardening, Jingzhou 434025, Hubei (CN)
  • Yongjun FEI Yangtze University, Engineering Research Center of Ecology and Agricultural Use of Wetland, Ministry of Education, Jingzhou 434020, Hubei (CN)

DOI:

https://doi.org/10.15835/nbha48311933

Keywords:

growth; lead stress; Phoebe chekiangensis; photosynthetic parameters

Abstract

Experiments were conducted on 1-year Phoebe chekiangensis seedlings treated by different concentration (0, 300, 600, 900, 1200 mg/L) of Pb (NO3)2. Sixty days later, determination was implemented on seedling growth, physiological and photosynthetic parameters. The results showed that the lower concentration treated could promote the growth of the seedlings. But with the increase of concentration of lead, P. chekiangensis seedling height increment, ground diameter growth, whole biomass, total root surface area, root volume, total root length and root activity decreased, while root-shoot ratio present a rising trend. With the increase of concentration of Pb(NO3)2 solution, the membrane permeability and MDA content of P. chekiangensis seedlings showed a trend of rise after the first reduce; the protein content and chlorophyll content presented a trend of decrease after the first increase; while the POD, SOD and CAT activity increased firstly but decreased afterwards; the net photosynthetic rate, stomatal conductance, intercellular CO2 concentration, transpiration rate were all increase at first then decrease, which indicated that protection enzyme activity and membrane was damaged thus the growth of P. chekiangensis seedlings was inhibited.

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Published

2020-08-31

How to Cite

YANG, Y. ., LI, W. ., HE, X. ., HU, D. ., & FEI, Y. . (2020). Effects of lead on growth, osmotic adjustment, antioxidant activity and photosynthetic responses in Phoebe chekiangensis seedlings. Notulae Botanicae Horti Agrobotanici Cluj-Napoca, 48(3), 1637–1648. https://doi.org/10.15835/nbha48311933

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Research Articles
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DOI: 10.15835/nbha48311933