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首页> 外文期刊>Plant and Soil >Effect of endophytic fungus Piriformospora indica and PEG-induced water stress on maximum root growth pressure and elongation rate of maize
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Effect of endophytic fungus Piriformospora indica and PEG-induced water stress on maximum root growth pressure and elongation rate of maize

机译：内生真菌吡虫草籼稻和PEG诱导水分胁迫对玉米最大根生长压力和伸长率的影响

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AimWe aimed to determine the effect of Piriformospora indica inoculation on maize maximum root growth pressure (sigma(max)) and root elongation rate (ER) over a wide range of water potentials.MethodsThe maximum axial force (F-max) exerted by the P. indica-inoculated and non-inoculated roots of maize (Zea mays L. cv. Maxima) seedlings were measured under control (osmotic potential of zero) and PEG-induced water stress (i.e., osmotic potentials of -0.1, -0.2, -0.3 and-0.4MPa) conditions. After measuring root diameter (d), sigma(max) was calculated by dividing the F-max by the corresponding root cross-sectional area. To test the toxicity of PEG-6000 on root growth, the effect of osmotic potentials induced by PEG-6000 on ER was compared with the corresponding matric potentials in two soils.ResultsThe establishment of a mutualistic relationship between maize roots and P. indica exerted a temporary stress on plants leading to greater lag time for force development (T-lag) and the time to reach F-max (T-max) in inoculated plants. However, root colonization resulted in greater F-max, sigma(max) and ER especially under moderate and severe water stresses. Severe water stress decreased sigma(max), F-max, d, T-max and ER.ConclusionP. indica inoculation can moderate adverse influences of stressful conditions on growth and elongation of plant roots especially during the initial growth stages by enhancing osmotic adjustment and/or by changing cell wall mechanical characteristics.
机译：AIMWE旨在确定Piriformospora Indica接种对玉米最大根生长压力（Sigma（Max））和根伸长率（ER）的效果，在各种水势上。通过P施加的最大轴向力（F-MAX）。 。在玉米（Zea mays L.CV.Co.Maxima）幼苗（零）和PEG诱导的水胁迫（即-0.1，-0.2的渗透电位， - 0.3和-0.4MPa）条件。在测量根直径（D）之后，通过将F-MAX除以相应的根横截面积来计算Sigma（MAX）。为了测试PEG-6000对根生长的毒性，将PEG-6000对ER上的渗透电位的效果与两个土壤中的相应Matric电位进行比较。玉米根部和P. indica之间的互联关系建立了一个植物的暂时压力导致力发育（T-LAG）的更大滞后时间，以及接种植物中达到F-MAX（T-MAX）的时间。然而，根殖民化导致更大的F-MAX，Sigma（MAX）和ER，特别是在中等和严重的水胁迫下。严重的水胁迫下降σ（MAX），F-MAX，D，T-MAX和ER.Conclusionp。由于通过提高渗透调整和通过改变细胞壁机械特性，籼稻接种能够适度对植物根生长和植物根伸长率的增长和伸长的影响。

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