Plant physiology and biochemistry

Photosynthetic and Physiological Characteristics of Camellia perpetua under Different Light Intensities

  • 杨运源,邓 征,黄永芳,吕铭滔,龚勇军
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  • (College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, Guangdong China)

Online published: 2022-03-31

Abstract

In order to explore the photosynthetic and physiological characteristics of Camellia perpetua under different light intensities, two-year-old C. perpetua cuttings were used as the research object, and four light intensities, including 10% light, 20% light, 40% light and full light, were set. The photosynthetic and physiological indexes were measured after 45 days of plant adaptation. The results showed that the photosynthetic rate (Pn) and stomatal conductance (Gs) were the highest in 10% light treatment, there was no significant difference between 20% light and 40% light treatment, but significantly higher than that in full light treatment. The intercellular CO2 concentration (Ci) and transpiration rate (Tr) of full light treatment were significantly higher than those of the other three treatments. There was no significant difference between 20% light treatment and 10% light treatment in Ci, but significantly lower than 40% light treatment. There was no significant difference between 20% light and 40% light, but significantly higher than 10% light in Tr. Contents of chlorophyll a, chlorophyll b and the total amount of chlorophyll were the highest under 40% light, which was significantly higher than those of other treatments. The protein content and peroxidase (POD) activity were the highest under 10% light. There was significant difference among the treatments in protein content, and the POD activity under full light was significantly lower than those of other treatments. Soluble sugar content, superoxide dismutase (SOD) activity and malondialdehyde (MDA) content were the highest in full light and the lowest in 10% light. C. perpetua was more suitable for growing in shady and low light environment, which was conducive to photosynthesis, growth and development of plants. High intensity light environment would inhibit the photosynthetic physiology of C. perpetua in varying degrees.

Cite this article

杨运源,邓 征,黄永芳,吕铭滔,龚勇军 . Photosynthetic and Physiological Characteristics of Camellia perpetua under Different Light Intensities[J]. Subtropical Plant Science, 2021 , 50(06) : 471 -477 . DOI: 10.3969/j.issn.1009-7791.2021.06.007

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