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Citation:

Effect of Light Quality on Growth and Taxanes Contents of Taxus yunnanensis

  • Received Date: 2011-11-26
  • In order to study the effect of light quality on the growth, photosynthesis and Taxanes accumulation of Taxus yunnanensis, 2-years old young T. yunnanensis were planted under various color films for 1 year. Their size, biomass, architectural parameters, leaf feature, and photosynthetic parameters such as the maximal net photosynthesis rate (Pmax), apparent quantum yield (AQY), dark respiration rate (Rd), light saturation point (LSP), light compensation point (LCP) and Taxol content etc. were determined. The results showed that the Pmax, AQY, Rd, LSP, LCP, height, leaf and total biomass of the plants under red films increased. The Pmax, AQY of the plants under yellow films decreased, and the LSP,LCP, leaf, branch, root and total biomass increased. The Pmax and AQY, and ground diameter of the plants under blue films decreased, while the Rd,LSP,LCP and height increased. Under different color films, the diffrence of tananes content in the plants were not significant. The content of baccatin Ⅲ in leaf and 7-epi-taxol in root of the plants under red films increased. The content of Taxol, 10-deacetylbaccatin Ⅲ and 7-epi-taxol in root of the plants under yellow f ilms increased. The content of Taxol in root of the plant under blue films increased, but the content of baccatin Ⅲ in leaf dicreased.
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Effect of Light Quality on Growth and Taxanes Contents of Taxus yunnanensis

  • 1. Research Institute of Resource Insects, Chinese Academy of Forestry, Kunming 650224, Yunnan, China
  • 2. Beijing Forestry University, Beijing 100083, China

Abstract: In order to study the effect of light quality on the growth, photosynthesis and Taxanes accumulation of Taxus yunnanensis, 2-years old young T. yunnanensis were planted under various color films for 1 year. Their size, biomass, architectural parameters, leaf feature, and photosynthetic parameters such as the maximal net photosynthesis rate (Pmax), apparent quantum yield (AQY), dark respiration rate (Rd), light saturation point (LSP), light compensation point (LCP) and Taxol content etc. were determined. The results showed that the Pmax, AQY, Rd, LSP, LCP, height, leaf and total biomass of the plants under red films increased. The Pmax, AQY of the plants under yellow films decreased, and the LSP,LCP, leaf, branch, root and total biomass increased. The Pmax and AQY, and ground diameter of the plants under blue films decreased, while the Rd,LSP,LCP and height increased. Under different color films, the diffrence of tananes content in the plants were not significant. The content of baccatin Ⅲ in leaf and 7-epi-taxol in root of the plants under red films increased. The content of Taxol, 10-deacetylbaccatin Ⅲ and 7-epi-taxol in root of the plants under yellow f ilms increased. The content of Taxol in root of the plant under blue films increased, but the content of baccatin Ⅲ in leaf dicreased.

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