草业学报 ›› 2024, Vol. 33 ›› Issue (10): 135-146.DOI: 10.11686/cyxb2023426
• 研究论文 • 上一篇
王正(), 李新, 张建贵, 柴继宽, 赵桂琴, 牛奎举()
收稿日期:
2023-11-14
修回日期:
2024-01-18
出版日期:
2024-10-20
发布日期:
2024-07-15
通讯作者:
牛奎举
作者简介:
Corresponding author. E-mail: niukj@gsau.edu.cn基金资助:
Zheng WANG(), Xin LI, Jian-gui ZHANG, Ji-kuan CHAI, Gui-qin ZHAO, Kui-ju NIU()
Received:
2023-11-14
Revised:
2024-01-18
Online:
2024-10-20
Published:
2024-07-15
Contact:
Kui-ju NIU
摘要:
为探究外源褪黑素对燕麦抗叶斑病的诱导效应及诱导抗病机理,本研究以‘牧乐思’燕麦品种为试验材料,叶面喷施不同浓度褪黑素(0、10、100、250、500和1000 μmol·L-1)后接种燕麦徳氏霉病原菌,以未接种病原菌为对照,接种病原菌9 d后统计病情指数和采集叶片测定抗氧化系统、苯丙烷代谢相关生理指标和相关酶基因相对表达量。结果表明,叶斑病明显抑制燕麦生长,喷施不同浓度褪黑素后叶斑病病情指数明显降低,其中100 μmol·L-1褪黑素处理下病原菌体外诱导效率、过氧化氢酶、苯丙氨酸解氨酶活性和抗坏血酸过氧化物酶基因表达量最高,分别高于只接种病原菌处理50.72%、80.32%、3.88%和148.00%;250 μmol·L-1褪黑素处理下超氧阴离子产生速率和丙二醛含量最低,分别低于只接种病原菌处理28.27%和86.62%,超氧化物歧化酶、过氧化物酶、抗坏血酸过氧化物酶、肉桂酸-4-羟化酶、4-香豆酸∶辅酶A连接酶活性、木质素、总酚、类黄酮含量和超氧化物歧化酶、过氧化物酶、过氧化氢酶、苯丙氨酸解氨酶、4-香豆酸∶辅酶A连接酶、肉桂酸-4-羟化酶基因表达量最高,分别高于只接种病原菌处理128.23%、137.14%、74.00%、52.65%、26.73%、1.40%、10.33%、13.70%、352.56%、80.32%、65.71%、26.65%、52.65%和20.11%;500 μmol·L-1褪黑素处理下过氧化氢含量最低,低于只接种病原菌处理75.45%,叶绿素含量最高,高于只接种病原菌处理81.35%。综合各项指标结果,筛选出最适诱导浓度为250 μmol·L-1,试验结果可为燕麦防治叶斑病提供新途径。
王正, 李新, 张建贵, 柴继宽, 赵桂琴, 牛奎举. 外源褪黑素介导抗氧化和苯丙烷代谢提高燕麦叶斑病抗性的研究[J]. 草业学报, 2024, 33(10): 135-146.
Zheng WANG, Xin LI, Jian-gui ZHANG, Ji-kuan CHAI, Gui-qin ZHAO, Kui-ju NIU. Exogenous melatonin mediates the antioxidant system and phenylpropanoid metabolism to induce resistance to leaf spot disease in oat[J]. Acta Prataculturae Sinica, 2024, 33(10): 135-146.
引物Primer | 上游引物Upstream primer | 下游引物Downstream primer |
---|---|---|
超氧化物歧化酶SOD | TGTCGATCGGGCAGATGATG | CCCCACCACCAGGTTTCATT |
过氧化物酶POD | AACGTGCAGAACCCGATCAT | AGCGGTAGTCCCTCTGATGT |
过氧化氢酶CAT | CGGAGTCCCTCCACATGTTC | TTGACGTAGTGGGACTTGCC |
抗坏血酸过氧化物酶APX | TTGTCGCTCTATCTGGTGGC | AGCCCCTCAGATTCTCCCTT |
苯丙氨酸解氨酶PAL | CTATCGATCTGCGCCACCTT | TGTGATTGGTGCTCAGGGTC |
4-香豆酸∶辅酶A连接酶4CL | AGGATGCTGCTGTCGTATCG | TGCGACGAACTGCTTGATCT |
肉桂酸-4-羟化酶C4H | AACTACGGCGACTTCATCCC | TCCTTGAAGAGCTTGAGGCG |
肌动蛋白基因The actin gene | GAGCGGGAAATTGTAAGGGAC | ATGGATGGCTGGAAGAGGAC |
表1 引物设计
Table 1 The qRT-PCR primer design
引物Primer | 上游引物Upstream primer | 下游引物Downstream primer |
---|---|---|
超氧化物歧化酶SOD | TGTCGATCGGGCAGATGATG | CCCCACCACCAGGTTTCATT |
过氧化物酶POD | AACGTGCAGAACCCGATCAT | AGCGGTAGTCCCTCTGATGT |
过氧化氢酶CAT | CGGAGTCCCTCCACATGTTC | TTGACGTAGTGGGACTTGCC |
抗坏血酸过氧化物酶APX | TTGTCGCTCTATCTGGTGGC | AGCCCCTCAGATTCTCCCTT |
苯丙氨酸解氨酶PAL | CTATCGATCTGCGCCACCTT | TGTGATTGGTGCTCAGGGTC |
4-香豆酸∶辅酶A连接酶4CL | AGGATGCTGCTGTCGTATCG | TGCGACGAACTGCTTGATCT |
肉桂酸-4-羟化酶C4H | AACTACGGCGACTTCATCCC | TCCTTGAAGAGCTTGAGGCG |
肌动蛋白基因The actin gene | GAGCGGGAAATTGTAAGGGAC | ATGGATGGCTGGAAGAGGAC |
图1 外源褪黑素对病原菌生长的影响不同小写字母表示不同处理间差异显著(P<0.05)。下同。The different lowercase letters represent significant differences among different treatments (P<0.05). The same below.
Fig.1 The effect of exogenous melatonin on the growth of pathogenic bacteria
图4 外源褪黑素对燕麦苗期接种病原菌后叶片病情指数和叶绿素含量的影响
Fig.4 The effect of exogenous melatonin on the disease index and chlorophyll content of oat leaves after inoculation with pathogenic bacteria during the seedling stage
图5 外源褪黑素对燕麦幼苗接种病原菌后叶片H2O2含量、O2·-产生速率和丙二醛含量的影响
Fig.5 Effects of exogenous melatonin on H2O2 content, superoxide anion production rate, and malondialdehyde content in leaves of oat seedlings inoculated with pathogenic bacteria
图6 外源褪黑素对燕麦幼苗接种病原菌后叶片抗氧化酶活性的影响SOD: superoxide dismutase; POD: peroxidase; CAT: catalase; APX: aseorbate peroxidase.
Fig.6 Effect of exogenous melatonin on antioxidant enzyme activity in oat seedlings after inoculation with pathogenic bacteria
图7 外源褪黑素对燕麦苗期接种病原菌后叶片苯丙烷代谢相关酶活性的影响PAL: phenylalnine ammonialyase; C4H: cinnamic acid-4-hydroxylase; 4CL: 4-conumarate∶CoA ligase.
Fig.7 Effect of exogenous melatonin on the activity of phenylpropanoid metabolism related enzymes in oat leaves after inoculation with pathogenic bacteria during seedling stage
图8 外源褪黑素对燕麦苗期接种病原菌后叶片木质素、总酚和类黄酮含量的影响
Fig.8 The effect of exogenous melatonin on the lignin, total phenol, and flavonoid content of oat leaves after inoculation with pathogenic bacteria during the seedling stage
图9 外源褪黑素对燕麦苗期接种病原菌后叶片酶基因相对表达量的影响
Fig.9 The effect of exogenous melatonin on the relative expression of enzyme genes in oat leaves after inoculation with pathogenic bacteria during the seedling stage
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