关键词: 栀子, 干旱胁迫, 生长, 花叶性状

Abstract: The effects of drought stress on the growth, mosaic and leaf traits and antioxidant enzyme activities of Gardenia jasminoides were explored in this paper. Asexual line cuttings of G. jasminoides ‘Lingdi Zhenzhi’ were used as test materials, and the changes of plant height growth, ground diameter growth, relative chlorophyll content, floral traits and leaf traits under different degrees of drought stress were measured and correlation analysis was conducted. The experimental results showed that drought stress significantly reduced the total growth of G. jasminoides plant height and the growth of ground diameter, and reduced the flower diameter, the number of new leaves, leaf length, leaf width and other indexes, and the inhibition effect would be more and more obvious with the increasing of the drought degree, but the overall trend of SPAD was increasing. Drought stress shortened the growth cycle of single leaf of G. jasminoides, and accelerated the maturation of leaves but inhibited the formation of new leaves, thus reducing the accumulation of biomass of G. jasminoides and reducing water consumption, while causing the root system of G. jasminoides to grow slowly and it was difficult to take in enough nutrients, which was one of the reasons leading to the poor growth of G. jasminoides flower traits and leaf traits.

Key words: Gardenia jasminoides, drought stress, growth, floral and leaf traits