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首页> 外文期刊>Acta Physiologiae Plantarum >Synergistic effect of colonization with arbuscular mycorrhizal fungi improves growth and drought tolerance of Plukenetia volubilis seedlings
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Synergistic effect of colonization with arbuscular mycorrhizal fungi improves growth and drought tolerance of Plukenetia volubilis seedlings

机译：定植与丛枝菌根真菌的协同作用可提高Volkelis矮生小插曲苗的生长和抗旱性

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摘要

The objective of this study was to investigate the effects of arbuscular mycorrhizal fungus (AMF) inoculation on plant growth and drought tolerance in seedlings of a promising oilseed crop, Sacha Inchi (Plukenetia volubilis L.), under well-watered ordrought conditions. AMF inoculation was applied in four treatments: without AMF inoculation, Glomus versiforme, Paraglomus occultum, or combination of both microorganism inoculations. The results showed that AMF colonization significantly enhanced the growth of Sacha Inchi seedlings regardless of soil water conditions, and the greatest development was reached in plants dually inoculated under well-watered conditions. G. versiforme was more efficient than P. occultum. Plants inoculated with both symbionts had significantly greater specific leaf area, leaf area ratio and root volume when compared with the uninoculated control, G. versiforme, and P. occultum treatments alone, indicating a synergistic effect in the two AMF inoculation. Photosynthetic rateand water-use efficiency were stimulated by AMF, but not stomatal conductance. Inoculation with AM fungus increased antioxidant enzymes activities including guaiacol peroxidase and catalase, thus lowering hydrogen peroxide accumulation and oxidative damage, especially under drought stress conditions. However, proline content showed little change during drought stress and AMF colonization conditions, which suggested that proline accumulation might not serve as the main compound for osmotic adjustment ofthe studied species. These results indicate that AMF inoculation stimulated growth and enhanced drought tolerance of Sacha Inchi seedlings, through alterations in morphological, physiological and biochemical traits. This microbial symbiosis might be an effective cultivation practice in improving the performance and development for Sacha Inchi plants.
机译：这项研究的目的是调查在水分充足或干旱的条件下，接种丛枝菌根真菌（AMF）对有前景的油料作物Sacha Inchi（Plukenetia volubilis L.）幼苗的生长和耐旱性的影响。将AMF接种用于四种处理方法：不接种AMF，不接种Vermusforme，隐球菌或两种微生物接种的组合。结果表明，AMMF定植显着促进了Sacha Inchi幼苗的生长，而与土壤水分条件无关，并且在水源充足的条件下双重接种的植物获得了最大的发展。 G. versiforme比P. occultum更有效。与未接种的对照，粉状芽孢杆菌和隐球菌处理相比，接种两种共生菌的植物的比叶面积，叶面积比和根部体积均明显更大，表明两种AMF接种均具有协同作用。 AMF刺激光合速率和水分利用效率，但气孔导度却没有。接种AM真菌可增加抗氧化酶的活性，包括愈创木酚过氧化物酶和过氧化氢酶，从而降低了过氧化氢的积累和氧化损伤，尤其是在干旱胁迫条件下。然而，脯氨酸含量在干旱胁迫和AMF定植条件下几乎没有变化，这表明脯氨酸的积累可能不是研究物种渗透调节的主要化合物。这些结果表明，AMF接种通过改变形态，生理和生化特性，刺激了Sacha Inchi幼苗的生长并增强了其耐旱性。这种微生物共生可能是提高Sacha Inchi植物性能和发育的有效耕作方法。

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