Effects of three kinds of light intensity on physiological and biochemical characteristics of Stephania kwangsiensis

doi:10.14088/j.cnki.issn0439-8114.2022.12.016

Abstract

Abstract: Effects of different light intensities （100%, 75% and 50% of natural light） on photosynthetic characteristics and antioxidant enzyme system of Stephania kwangsiensis were studied. The results showed that there were significant differences in photosynthetic characteristics and antioxidant enzyme system of S. kwangsiensis under different light intensities. With the increase of light intensity, the light compensation point, light saturation point, dark respiration efficiency, apparent quantum efficiency, net photosynthetic rate, stomatal conductance, transpiration rate, peroxidase, catalase and proline contents of S. kwangsiensis showed an increasing trend, while the intercellular carbon dioxide concentration decreased first and then increased. The activity of superoxide dismutase （SOD） showed a trend of increasing first and then decreasing. In conclusion, the light intensity affected the photosynthetic characteristics and antioxidant enzyme activity of S. kwangsiensis,high light intensity had an inhibitory effect on the growth of S. kwangsiensis,and 75% light intensity was the best growth condition of S. kwangsiensis. Appropriate shading treatment should be adopted in the cultivation of S. kwangsiensis, which is conducive to plant growth and thus improves the yield of S. kwangsiensis.

Key words: Stephania kwangsiensis, light intensity, photosynthetic characteristics, physiological indexes

CLC Number:

R282
Q945.11

DENG Li-li, QIN Hui-zhen, SHI Yan-cai, ZOU Rong, JIANG Yun-sheng, XIONG Zhong-chen. Effects of three kinds of light intensity on physiological and biochemical characteristics of Stephania kwangsiensis[J]. HUBEI AGRICULTURAL SCIENCES, 2022, 61(12): 81-85.

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