| 内生真菌侵染对盐胁迫下黑麦草种子萌发的影响 |
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| 引用本文： | 张萍萍,胡龙兴,傅金民.内生真菌侵染对盐胁迫下黑麦草种子萌发的影响[J].草业科学,2012,29(7):1094-1099. |
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| 作者姓名： | 张萍萍 胡龙兴 傅金民 |
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| 作者单位： | 中国科学院植物种质创新与特色农业重点实验室,中国科学院武汉植物园,湖北武汉430074 |
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| 基金项目： | 公益性行业(农业)科研专项 |
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| 摘 要： | 以低内生真菌侵染率和高内生真菌侵染率的多年生黑麦草（Lolium perenne）种子为材料，研究了在不同浓度盐胁迫下内生真菌侵染对种子萌发的影响。结果表明，高内生真菌侵染率和低内生真菌侵染率种子的相对发芽率、相对活力指数、相对根长、相对苗长、相对根苗比均随盐胁迫程度的增加而显著下降。中、低浓度盐胁迫下（≤170 mmol·L-1 NaCl）二者的相对发芽率、相对活力指数、相对根长、相对苗长的差异不显著(P>0.05)；高浓度盐胁迫下（255 mmol·L-1 NaCl），高内生真菌侵染率种子的相对发芽率、相对活力指数、相对苗长均显著大于低内生真菌侵染率的品种(P<0.05)。盐胁迫抑制了多年生黑麦草种子的萌发，但在高浓度盐胁迫下内生真菌对宿主具有增益作用。
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| 关 键 词： | 多年生黑麦草 盐胁迫 种子萌发 内生真菌 |
Effects of endophytic fungi on seed germination of perennial ryegrass under salt stress |
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| ZHANG Ping-ping,HU Long-xing,FU Jin-min.Effects of endophytic fungi on seed germination of perennial ryegrass under salt stress[J].Pratacultural Science,2012,29(7):1094-1099. |
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| Authors: | ZHANG Ping-ping HU Long-xing FU Jin-min |
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| Institution: | (Key laboratory of Plant Germplasm Enhancement and Specialty Agriculture of Chinese Academy of Sciences; Wuhan Botanical Garden,Chinese Academy of Sciences,Wuhan 430074,China) |
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| Abstract: | To evaluate the effect of salinity and endophytic fungi on seed germination of Lolium perenne,8 perennial ryegrass varieties with high endophyte infection rate(≥80%) and 8 varieties with low rate(≤20%) were used for germination experiment under salinity stress.The results of this study showed that the relative germination rate(RGR),relative vitality index(RVI),relative root length(RRL),relative shoot length(RSL) and relative root/shoot ratio(RRS) decreased with increasing NaCl concentrations.There was no significant difference observed in RGR,RVI,RRL and RSL between high and low infection rate under 0,85,and 170 mmol·L-1 NaCl stress,while RGR,RVI,and RSL of seeds with high infection rate were significantly(P<0.05) higher than that of low infection rate under 255 mmol·L-1 NaCl stress.In a word,seed germination of perennial ryegrass was inhibited by salt stress,but endophyte infection could benefit seed germination under high salinity condition. |
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| Keywords: | perennial ryegrass salt stress seed germination endophytic fungi |
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