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首页> 外文期刊>Plant and Soil >Nostoc, Microcoleus and Leptolyngbya inoculums are detrimental to the growth of wheat (Triticum aestivum L.) under salt stress
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Nostoc, Microcoleus and Leptolyngbya inoculums are detrimental to the growth of wheat (Triticum aestivum L.) under salt stress

机译：盐胁迫下的Nostoc，Microcoleus和Leptolyngbya接种物对小麦（Triticum aestivum L.）的生长有害。

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This study investigated the effect of cyanobacterial inoculants on salt tolerance in wheat. Unicyanobacterial crusts of Nostoc, Leptolyngbya and Microcoleus were established in sand pots. Salt stress was targeted at 6 and 13 dS m(-1), corresponding to the wheat salt tolerance and 50 % yield reduction thresholds, respectively. Germinated wheat seeds were planted and grown for 14 (0 and 6 dS m(-1)) and 21 (13 dS m(-1)) days by which time seedlings had five emergent leaves. The effects of cyanobacterial inoculation and salinity on wheat growth were quantified using chlorophyll fluorescence, inductively coupled plasma-optical emission spectrometry and biomass measurements. Chlorophyll fluorescence was negatively affected by soil salinity and no change was observed in inoculated wheat. Effective photochemical efficiency correlated with a large range of plant nutrient concentrations primarily in plant roots. Inoculation negatively affected wheat biomass and nutrient concentrations at all salinities, though the effects were fewer as salinity increased. The most likely explanation of these results is the sorption of nutrients to cyanobacterial extracellular polymeric substances, making them unavailable for plant uptake. These results suggest that cyanobacterial inoculation may not be appropriate for establishing wheat in saline soils but that cyanobacteria could be very useful for stabilising soils.
机译：本研究调查了蓝藻接种剂对小麦耐盐性的影响。在砂锅中建立了Nostoc，Leptolyngbya和Microcoleus的单蓝细菌外壳。盐胁迫的目标是6和13 dS m（-1），分别对应于小麦的耐盐性和50％的减产阈值。播种发芽的小麦种子，使其生长14天（0和6 dS m（-1））和21天（13 dS m（-1）），此时幼苗有5片出苗叶片。使用叶绿素荧光，电感耦合等离子体-光发射光谱法和生物量测量定量了蓝藻接种和盐度对小麦生长的影响。叶绿素荧光受土壤盐分的负面影响，在接种小麦中未观察到变化。有效的光化学效率与主要在植物根部的多种植物营养素浓度相关。在所有盐度下，接种都会对小麦生物量和养分含量产生负面影响，尽管随着盐度的增加其影响较小。这些结果最可能的解释是养分被蓝细菌胞外聚合物吸收，使植物无法吸收它们。这些结果表明，蓝细菌接种可能不适合在盐渍土壤中种植小麦，但是蓝细菌对于稳定土壤可能非常有用。

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