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Bulletin of Botanical Research ›› 2022, Vol. 42 ›› Issue (6): 1088-1095.doi: 10.7525/j.issn.1673-5102.2022.06.019

• Physiology and Ecology • Previous Articles     Next Articles

Effects of Exogenous NO on Soil Nutrient Content and Seedling Growth Characteristics from Potted Catharanthus roseus under Light-shading Stress

Ying LIU, Jiayi WU, Ling JIN, Qianru JI, Yujie FU, Dewen LI()   

  1. College of Chemistry,Chemical Engineering and Resource Utilization,Key Laboratory of Forest Plant Ecology,Ministry of Education,Northeast Forestry University,Harbin 150040
  • Received:2021-08-25 Online:2022-11-20 Published:2022-11-22
  • Contact: Dewen LI E-mail:ldw8182@163.com
  • About author:LIU Ying(1978—),female,Doctor,majoring in the regulation mechanism of secondary metabolites in medicinal plants.
  • Supported by:
    National Key R&D Program of China(2017YFD0600706);Foundamental Research Funds for the Central Universities(2572017BA07);Heilongjiang Province Natural Science Fund Project(QC2017009)


To explore the effect of exogenous NO donor(sodium nitroprusside, SNP) on soil nutrient content and Catharanthus roseus seedlings growth under light-shading stress, four treatments(normal culture, external application of SNP, light-shading treatment and external application of SNP+ shading treatment) were designed, and the change characteristics of C, N, P nutrient contents and physicochemical index from potted soil, and the seedling shoot growth index(plant height, leaf length, leaf width, leaf area, fresh mass and dry mass) were analyzed respectively. The results showed that soil water content, soil pH and soil organic carbon content increased significantly(P<0.05) under the combination of shading stress and exogenous NO, while the contents of total nitrogen, alkali-hydrolyzable nitrogen, total phosphorus and available phosphorus in soil increased but not significantly, and the soil C/N and C/P values reached significant level, and the C/N value increased significantly(P<0.05); Correlation analysis showed that there was a positive correlation between soil pH value and organic carbon content(P<0.05), the change of soil organic carbon content was positively correlated with plant height and leaf fresh mass(P<0.05). It indicated that external application of SNP could promote the increase of soil pH under light-shading stress, change soil organic carbon content, increase C/N value, improve soil fertility, and promote leaf growth and development, then increase the biomass of C. roseus, and provide basis for scientific balanced fertilization and alkaloid content accumulation of C. roseus.

Key words: Soil organic carbon, growth index, Catharanthus roseus, exogenous NO donor

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