CN-121991851-A - Serratia marcescens P2A12 and application thereof

Abstract

The invention discloses Serratia marcescens P2A12 and application thereof, and belongs to the technical field of microorganisms. Serratia marcescens (SERRATIA MARCESCENS) P2A12 is deposited at the Guangdong province microorganism strain collection, the deposition date is 2026, 1 month and 12 days, and the deposition number is GDMCC NO.67626. The serratia marcescens P2A12 provided by the invention can promote the growth and development of plant lateral root systems, accumulate lignin and chlorophyll to improve plant biomass, reduce fertilizer application and improve crop yield under management, and has the functions of nitrogen fixation, phosphorus dissolution, potassium dissolution, siderophore production, biofilm formation and the like. Solves the problems of environmental pollution and edible safety caused by chemical reagents. As a biological fertilizer, the fertilizer can effectively improve the utilization rate of nitrogen, phosphorus, potassium and iron in soil by plants, promote the growth of the plants, is safe and environment-friendly, and has wide application prospect.

Inventors

• CHENG XU
• YANG CHANGSHENG
• XIONG XINGYAO
• ZHONG YANG

Assignees

• 中国农业科学院农业基因组研究所

Dates

Publication Date

20260508

Application Date

20260225

Claims (4)

1. 1. Serratia marcescens (SERRATIA MARCESCENS) P2A12 is deposited at the Cantonese microorganism strain collection, 1 month 12 days of 2026, accession number GDMCC NO.67626.
2. 2. A microbial agent or a biological fertilizer comprising Serratia marcescens (SERRATIA MARCESCENS) P2a12 as defined in claim 1.
3. 3. Use of Serratia marcescens (SERRATIA MARCESCENS) P2a12 as claimed in claim 1 or of a microbial inoculum or biofertilizer as claimed in claim 2 for promoting potato growth.
4. 4. Use of Serratia marcescens (SERRATIA MARCESCENS) P2a12 as claimed in claim 1 or of a microbial inoculum or a biological fertilizer as claimed in claim 2 for increasing potato yield.

Description

Serratia marcescens P2A12 and application thereof Technical Field The invention relates to the technical field of microorganisms, in particular to a serratia marcescens strain and application thereof. Background The rising of chemical fertilizer industry in the 20 th century, the significant advantages of fast nutrient release and high crop absorption efficiency become important milestones in the agricultural modernization process. However, with the continuous upgrading of the pursuit of agricultural production on yield, the abuse and unreasonable application of chemical fertilizers gradually evolve into 'invisible yoke' which restricts the sustainable development of agriculture, for example, the original nutrient balance of soil is broken by single application of chemical fertilizers for a long time, so that the problems of soil aggregate structure damage, water and fertilizer retention capacity reduction, soil hardening, acidification and the like are increasingly serious. Under the background, the novel fertilizer which utilizes the life activities of specific microorganisms to provide nutrients required by crops and improve the soil environment can not only efficiently activate the fixed nutrients in the soil through the actions of nitrogen fixation, phosphorus dissolution and potassium dissolution of the microorganisms and reduce the fertilizer dosage, but also repair the damaged soil micro-ecological system through the propagation and metabolism of beneficial microorganisms, improve the soil fertility and the stress resistance of crops and reduce the agricultural non-point source pollution from the source. Serratia marcescens (SERRATIA MARCESCENS), also known as LING BI, produces bright red pigment, is widely distributed in nature, and is a resident flora in water and soil. Studies have shown that Serratia marcescens has a variety of biological activities, and are increasingly valued by researchers. After searching the Chinese patent publication net, the state patent office has recently granted that the content of the invention patent related to Serratia marcescens is mainly concentrated on the aspects of fermentation production of colicin, molecular biology research materials, anti-cancer drug research and development, crop growth promotion and pathogen antagonism, organic pollutant degradation, soil heavy metal restoration and the like of Serratia marcescens, and the application of Serratia marcescens is wide. Application number 202310516839.X, the invention name is a microbial compound fungicide with growth promoting function and application thereof in ginger cultivation, and the patent discloses Serratia marcescens GRSB-147 which has the effect of phosphate dissolving, but does not have the effects of potassium dissolving, nitrogen fixing, siderophore producing and biofilm forming. The application number 202510552319.3 is an application of a strain of saline-alkali tolerant rhizosphere growth-promoting serratia marcescens and saline-alkali soil growth-promoting restoration thereof, and the patent discloses a strain of serratia marcescens SP-38 which has the functions of dissolving phosphorus, dissolving potassium and fixing nitrogen, can improve the seedling growth vigor of corn and the germination rate of corn seeds in a saline-alkali environment, but does not have the capability of generating siderophores and biomembrane formation. In addition, there is no effect of field test on promoting crop growth and improving crop yield under fertilization conditions. Disclosure of Invention The invention aims to solve the technical problem of providing Serratia marcescens with outstanding effect of reducing application and efficiency and application thereof. The invention adopts the technical scheme that Serratia marcescens (SERRATIA MARCESCENS) P2A12 is preserved in the microorganism strain collection center of Guangdong province, the preservation date is 2026, 1 month and 12 days, and the preservation number is GDMCC NO.67626. A microbial inoculum or a biological fertilizer containing Serratia marcescens (SERRATIA MARCESCENS) P2A 12. The Serratia marcescens (SERRATIA MARCESCENS) P2A12 or the microbial inoculum or the biological fertilizer is applied to promoting the growth of the potatoes. The Serratia marcescens (SERRATIA MARCESCENS) P2A12 or the microbial inoculum or the biological fertilizer is applied to improving the yield of the potatoes. The Serratia marcescens (SERRATIA MARCESCENS) P2A12 has the functions of fixing nitrogen, producing iron carrier, dissolving phosphorus, dissolving potassium, forming biological film and the like, can be better colonized on plant rhizosphere, effectively dissolves insoluble phosphorus and potassium in plant rhizosphere soil, combines nitrogen in air and chelated ferric iron in soil, can effectively improve the utilization rate of nitrogen, phosphorus, potassium and iron in soil by being used as a biological microbial inoculum fertilizer, further promotes plant gr