转录组测序分析干旱胁迫下复合微生物菌肥对玉米幼苗抗旱性的影响  

Effects of Compound Microbial Fertilizer on Drought Resistance of Maize Seedlings under Drought Stress by Transcriptome Analysis

作　　者：卿晨 刘正学 李彦杰 Qing Chen;Liu Zhengxue;Li Yanjie(College of Biology and Food Engineering,Chongqing Three Gorges University,Chongqing 404100,China)

机构地区：[1]重庆三峡学院生物与食品工程学院,重庆404100

出　　处：《作物杂志》2024年第3期32-39,共8页Crops

基　　金：国家自然科学基金面上项目(31270451);三峡库区水环境演变与污染防治重庆市重点实验室开放基金(WEPKL2021YB-02)。

摘　　要：为探讨干旱胁迫下复合微生物菌肥对玉米幼苗抗旱性的影响,以玉米品种鄂玉16为材料,分别设置空白对照(CK)、添加解磷菌(P)、添加丛枝菌根真菌(A)和复合微生物菌肥(解磷菌+丛枝菌根真菌)(AP)4个处理,控水土培作干旱胁迫处理,取玉米叶片作生理生化指标检测及转录组测序分析。结果表明,干旱胁迫后(即第5、10和15天),丙二醛(MDA)最高为CK处理,最低为AP处理;AP处理的超氧化物歧化酶(SOD)和过氧化物酶(POD)活性均显著高于CK。整个胁迫期间,AP处理的过氧化氢酶(CAT)活性均高于CK。与CK相比,转录组测序分析检测到AP处理的玉米苗叶片中有320个差异表达基因,其中上调表达204个,下调表达116个;GO分析显示,差异表达基因富集到生物过程、细胞组分和分子功能的占比分别为34.33%、43.12%和22.55%。KEGG分析显示,差异表达基因显著富集的通路包括植物―病原互作、淀粉和蔗糖代谢、其他类型O-聚糖生物合成、玉米素生物合成、半乳糖代谢和氨基酸生物合成等。To explore the effects of compound microbial fertilizer on drought resistance of maize seedlings under drought stress,four treatments,blank control group(CK),phosphate solubilizing bacteria addition group(P),arbuscular mycorrhizal fungi addition group(A)and compound microbial fertilizer addition group(including phosphate solubilizing bacteria and arbuscular mycorrhizal fungi)(AP),were set up respectively with maize“Eyu 16”as the material,and then subjected to drought stress treatment through soil water control.Maize leaf samples were collected for physiological and biochemical index detection and transcriptome sequencing analysis.The results showed that after drought stress treatment(i.e.the fifth,tenth and fifteenth days),the highest MDA contents in maize leaves was CK,the lowest was AP treatment,and the activities of SOD and POD in maize leaves in AP treatment were significantly higher than those in CK,and the activities of CAT in maize leaves in AP treatment were higher than those in CK treatment during stress.Compared with CK,transcriptome sequencing analysis detected 320 differentially expressed genes(DEGs)in the leaves of maize seedlings in AP treatment,including 204 up-regulated genes and 116 down-regulated genes;the results of GO analysis showed that 34.33%,43.12%and 22.55%of DEGs were enriched in biological processes,cell components and molecular functions,respectively.The results of KEGG analysis showed that the significant enrichment pathways included plant pathogen interaction,starch and sucrose metabolism,other types of O-glycan biosynthesis,zeatin biosynthesis,galactose metabolism and amino acid biosynthesis.

关 键 词：玉米幼苗 干旱胁迫 复合微生物菌肥 转录组 

分 类 号：S513[农业科学—作物学]