优良乳酸菌对杂交狼尾草生长和抗氧化能力的影响

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中图分类号：S543.9 文献标识码：A 文章编号：1007-0435（2025）12-4183-08

引用格式：张建国.优良乳酸菌对杂交狼尾草生长和抗氧化能力的影响[J].草地学报，2025，33（12）：4183-4190LIChao，HUYa-qin，ZHANG Jian-guo.EfectsofExcellentLacticAcidBacteriaonPenmnisetumamericanum ×P purpureum Growth and Antioxidant Capacity[J]. Acta Agrestia Sinica，2O25，33（12）：4183-4190

Effects ofExcellentLactic Acid Bacteria on Pennisetum americanum ×P purpureum Growth and Antioxidant Capacity

LI Chao，HUYa-qin，ZHANG Jian-guo* （SouthPrataculturalResearch Center，South ChinaAgriculturalUniversity，Guangzhou，GuangdongProvince5lO642，China）

Abstract：In order to clarify the growth promoting efects of lactic acid bacteria on the growth，physiological characteristics and antioxidant capacity of Pennisetum americanum ×P ： purpureum，Enterococcus faecalis，Lactobacillus plantarum，Lactobacillus brevis，Lactococcus lactis，Leuconostoc mesenterodies and Lactococcus lactis subsp lactis isolated and identified in the laboratory，were used as the reseatch objects through pot experiment.The results showed that the plant height，leaf area，chlorophyll，soluble sugar and soluble protein of Pen 1 nisetum americanum ×P ： purpureum increased by 33.1%-57.9% ， 44.8%-73.7% ， 13.0%-25.6% ， 44.2% 124.8% and 56.4%-79.9% ，respectively. The activities of CAT，SOD，POD and APX in leaves increased by 7.4% -211. 8% ， 104.4%-176.3% ， 6.2%-22.4% and 11.0%-74.4% ，respectively，and the MDA content decreased by 29.6%-56.0% ．The total phenolic content of leaves increased by 15.9%-36.1% Com pared with the control， L2 ， L6 and L7 had the best effects on the growth promotion，quality improvement and antioxidant enhancement of Pennisetum americanum ×P ：purpureum.

Keywords：Lactic acid bacteria;Pennisetum americanum ×P ：purpureum;Antioxidant properties;Agronomic traits;Plant growth promotingbacteria（PGPB）

植物生长促进菌（Plant growth-promoting bacteria，PGPB）是从植物周边生境中分离出来的一种或多种微生物，具有直接或间接抑制病虫害与有害微生物，增强植物吸收营养元素的能力，进而促进植物生长[1。（剩余16465字）