Effects of Potassium-Solubilizing Bacteria on Growth, Antioxidant Activity and Expression of Related Genes in Fritillaria taipaiensis P. Y. Li  

作　　者：Jiaqi Lang Mingyan Ye Ya Luo Yueheng Wang Zhifen Shi Xiaotian Kong Xuan Li Nong Zhou 

机构地区：[1]Chongqing Engineering Laboratory of Green Planting and Deep Processing of Famous-Region Drug in the Three Gorges Reservoir Region,College of Biology and Food Engineering,Chongqing Three Gorges University,Chongqing,404120,China [2]College of Modern Chinese Medicine Industry,Chengdu University of Traditional Chinese Medicine,Chengdu,611130,China [3]College of Pharmacy,Dali University,Dali,671000,China

出　　处：《Phyton-International Journal of Experimental Botany》2024年第4期789-806,共18页国际实验植物学杂志（英文）

基　　金：a Key Project of the Natural Science Foundation of Chongqing Education Committee(KJZD-K202101201).

摘　　要：This study aimed to examine the effects of inoculating Fritillaria taipaiensis P.Y.Li leaves with different strains ofpotassium-solubilizing bacteria (KSB), or combinations thereof, focusing on aspects of photosynthesis and physiologicaland biochemical characteristics. At present, some studies have only studied the rhizosphere microbialcommunity characteristics of F. taipaiensis and have not discussed the effects of different microbial species on thegrowth promotion of F. taipaiensis. This paper will start from the perspective of potassium-solubilizing bacteria toconduct an in-depth study. Seed cultivation commenced at the base with three different KSBs in early October2022. The growth of F. taipaiensis leaves was observed after different treatments. Both single-plant and compoundinoculations were executed. A total of eight treatment groups were established, with aseptic fertilizer and sterilizedsoil functioning as the control group. The results reveal that intercellular CO_(2) concentration (Ci), stomatal conductance(Gs), and transpiration rate (Tr) were at their apex in the S7 group. Most treatment groups exhibited anincrease in leaf area, photosynthetic pigment content, soluble sugar, soluble protein, Superoxide Dismutase(SOD), Peroxidase (POD), Catalase (CAT) activities, and proline content. The expression levels of POD, SOD,and CAT genes were evaluated, following inoculation with different KSB. The highest was the S7 group. Theinoculation with various KSB, or combinations thereof, appears to bolster the growth and development of F. taipaiensis.The composite inoculation group S7, comprising Bacillus cereus, Burkholderia cepacia, and Bacillus subtilis,manifested the most favorable impact on the diverse indices of F. taipaiensis, thereby furnishing valuableinsights for the selection of bacterial fertilizer in the artificial cultivation of F. taipaiensis.

关 键 词：Fritillaria taipaiensis BACTERIA antioxidant enzyme genes leaf physiology and biochemistry photosynthetic characteristics 

分 类 号：Q94[生物学—植物学]