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首页> 美国卫生研究院文献>Journal of Nematology >Induction of Systemic Acquired Resistance by Rotylenchulus reniformis and Meloidogyne incognita in Cotton Following Separate and Concomitant Inoculations
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Induction of Systemic Acquired Resistance by Rotylenchulus reniformis and Meloidogyne incognita in Cotton Following Separate and Concomitant Inoculations

机译：分别接种和同时接种后棉轮虫和根结线虫对系统性获得性抗性的诱导

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Systemic acquired resistance (SAR) can be elicited by virulent and avirulent pathogenic strains and SAR against plant-parasitic nematodes has been documented. Our objective was to determine whether co-infection of cotton by Meloidogyne incognita and Rotylenchulus reniformis affects the population level of either nematode compared to infection by each species individually. Split-root trials were conducted in which plants were inoculated with i) R. reniformis only, ii) M. incognita only, iii) both R. reniformis and M. incognita, or iv) no nematodes. Half of the root system was inoculated with R. reniformis or M. incognita on day 0 and the other half with M. incognita or R. reniformis on day 0 or day 14 depending on the experiment. Experiments were conducted on cotton cultivar DP 0935 B2RF (susceptible to both nematodes), LONREN-1 (germplasm line resistant to R. reniformis), and M-120 RNR (germplasm line resistant to M. incognita), and tests were terminated 8 wk after the last inoculation. Both soil (vermiform) and roots (egg) extracted from each half of the root system to determine the total nematode population levels, and root galling was rated on a 0 to 10 scale. Mixed models analysis and comparison of least squares means indicated no differences in root galling (except on LONREN-1) or population levels when the two nematode species were introduced on the same day. When M. incognita was introduced 14 d after R. reniformis, reduction in galling (36% on DP 0935 and 33% on LONREN-1) and M. incognita population levels (35% on DP 0935 and 45% on LONREN-1) were significant (P ≤ 0.05). When R. reniformis was inoculated 14 d after M. incognita, reduction in R. reniformis population levels (18% on DP 0935 and 26% on M-120) were significant. This study documents for the first time that infection of cotton by a nematode can elicit SAR to another nematode species.
机译：系统性获得性抗药性（SAR）可以通过有毒和无毒的病原菌株引起，并且针对植物寄生线虫的SAR也已有文献记载。我们的目标是确定与隐孢子虫和轮虫轮虫共同感染棉花与单独感染每个物种相比是否会影响任一线虫的种群水平。进行了分根试验，在该试验中，植物接种了i）仅肾形念珠菌，ii）仅根结线虫，iii）肾形芽孢杆菌和根结线虫，或iv）没有线虫。根据实验，一半的根系在第0天接种肾形隐孢子菌或隐孢子虫，另一半在第0天或第14天接种隐孢子菌或隐孢子虫。对棉花品种DP 0935 B2RF（对两个线虫均易感），LONREN-1（对肾形头孢霉的抗性种质系）和M-120 RNR（对隐孢子虫的抗性种质系）进行了试验，试验于8周结束最后一次接种后。从根系的每半部分提取土壤（蠕虫）和根（卵），以确定总线虫种群水平，根gall虫的等级为0到10。混合模型分析和最小二乘法比较表明，当同一天引入两种线虫时，根gall虫（LONREN-1除外）或种群水平没有差异。当在隐孢子虫后14 d引入隐孢子虫，擦伤（DP 0935为36％，LONREN-1为33％）和隐孢子虫种群水平（DP 0935为35％，LONREN-1为45％）减少显着（P≤0.05）。当 R。在 M后14 d接种肾形目。 ， R减少。肾形目人群水平显着（DP 0935为18％，M-120为26％）。这项研究首次证明线虫对棉花的感染可以引起另一种线虫的SAR。

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