Welcome to Chinese Journal of Tropical Crops,

Chinese Journal of Tropical Crops ›› 2019, Vol. 40 ›› Issue (4): 688-692.DOI: 10.3969/j.issn.1000-2561.2019.04.010

• Phytophysiology and Biochemistry • Previous Articles     Next Articles

Growth and Antioxidant Physiology Effects of Camellia azalea Seedlings under Different Light Conditions

LI Xianmin1,LIU Xinliang2,LI Chunniu1,LU Jiashi1,ZHOU Jinye1,HUANG Changyan1,BU Zhaoyang1,*()   

  1. 1. Flowers Research Institute, Guangxi Academy of Agricultural Sciences, Nanning, Guangxi 530007, China
    2. Jiangxi Academy of Forestry, Nanchang, Jiangxi 330032, China
  • Received:2018-08-29 Revised:2019-02-10 Online:2019-04-15 Published:2019-05-21
  • Contact: Zhaoyang BU

Abstract:

To provide references for rational cultivation and improvement of resistance of strains, the growth and physiological characteristics of two-year-old Camellia azalea at 0, 30%, 50% and 80% shading levels were investigated. The relationships between light intensities and growth and physiological characteristics were analyzed. The results showed that with increasing shading rate, the plant height, ground diameter, crown width, branch number, survival rate, root dry weight, stem dry weight, leaf dry weight and total dry weight of C. azalea increased to a certain extent, with all of them being at the highest level under the 50% shading condition. With the increasing shading intensity, the MDA content, and SOD and POD activities in leaves decreased, then increased, and finally reached the lowest level under the 50% shading condition. However, the content of free amino acids in leaves trended to decrease gradually. Therefore, moderate shading treatment helped the growth of C. azalea seedlings, with 50% shading as the best planting effect.

Key words: shading, Camellia azalea, growth and development, antioxidant enzymes