Welcome to Bulletin of Botanical Research! Today is Share:

Bulletin of Botanical Research ›› 2022, Vol. 42 ›› Issue (3): 502-511.doi: 10.7525/j.issn.1673-5102.2022.03.020

• Physiology and Ecology • Previous Articles     Next Articles

Effects of Soil Moisture and Light Intensity on Growth and Photosynthetic Characteristics of Pterospermum kingtungense Seedlings

Shanshan ZHANG, Chunming YUAN()   

  1. Key Laboratory of Rare and Endangered Forest Plants of National Forestry and Grassland Administration/Yunnan Key Laboratory of Silviculture and Forest Resources Development,Yunnan Academy of Forestry and Grassland,Kunming 650201
  • Received:2021-04-22 Online:2022-05-20 Published:2022-05-20
  • Contact: Chunming YUAN E-mail:1162042782@qq.com
  • About author:ZHANG Shanshan(1984—),female,doctor,mainly engaged in the research of conservation biology.
  • Supported by:
    National Natural Science Foundation of China(31960278);National Science and Technology Fundamental Resources Investigation Project(2017FY100100)


One-year-old seedlings of Pterospermum kingtungense were selected as materials, effects of soil moisture and light intensity on growth(aboveground biomass, underground biomass, leaf number and plant height) and photosynthetic characteristics(net photosynthetic rate, transpiration rate, stomatal conductance, intercellular carbon dioxide concentration, stomatal limiting value and instantaneous water use efficiency) of P. kingtungense seedlings were investigated respectively. Two-factor of controlled test was analyzed. Six soil moisture gradients(100%, 90%, 80%, 60%, 40% and 30% field capacity) and four light intensity gradients(100%, 75%, 50% and 25%full light) were designed respectively. The results showed that: ①With the decrease of soil moisture, the growth index and photosynthetic characteristics of P. kingtungense seedlings first increased and then decreased, and generally reached the peak in W2(32.11%) or W3(28.54%) treatment. It performed worst under drought stress(W6). ②With the decrease of light intensity, except stomatic limitations(Ls), the four growth indexes and other five photosynthetic characteristics of P. kingtungense seedlings showed a trend of first increasing and then decreasing, and all of them performed best under the light intensity of L2(75% full light) or L3(50% full light). ③The comprehensive evaluation scores of different soil moisture and different light intensity showed that the comprehensive evaluation score of W2 soil moisture or L2 light intensity was the highest respectively, which proved that the appropriate soil water environment and moderate shading were the most suitable for the growth and photosynthesis of P. kingtungense seedlings. ④The results of binary linear regression analysis demonstrated that soil moisture and light intensity had significant effects on the growth and photosynthesis of P. kingtungense seedlings, respectively. This study elucidates the mechanism of soil water and light on regeneration of P. kingtungense seedlings, and could provide a theoretical basis for seedling breeding and population recovery and reconstruction in the future to a certain extent.

Key words: Pterospermum kingtungense, soil moisture, light intensity, natural regeneration

CLC Number: