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首页> 外文期刊>Plant and Soil >Influence of arbuscular mycorrhizae and Rhizobium on nutrient content and water relations in drought stressed alfalfa.
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Influence of arbuscular mycorrhizae and Rhizobium on nutrient content and water relations in drought stressed alfalfa.

机译：丛枝菌根和根瘤菌对干旱胁迫苜蓿养分含量和水分关系的影响。

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Medicago sativa cv. Aragon plants were inoculated with Glomus fasciculatum (M) and/or Rhizobium meliloti strain 102 F51 (R) or not inoculated (N). Non-mycorrhizal plants were supplemented with P and non-nodulated ones with N to achieve similar sizesand nutrient contents in all treatments. Plants were kept at full turgor or water stressed using two cycles of moisture stress and recovery. Leaves of N and R plants had decreased osmotic potentials and increased pressure potentials at full turgor, withno changes either in the bulk modulus of elasticity or the percentage of apoplastic water under water stress. By contrast, M and MR leaves did not vary in osmotic and turgor potentials under water stress but had increased apoplastic water volume and cell elasticity (lowering bulk modulus). Water stress decreased nutrient content of leaves and roots of non-inoculated plants. R plants showed a decrease in nutrient content of leaves but maintained some micronutrients in roots. Leaves of M plants were similar in content of nutrients to N plants. However, roots of M and MR plants had significantly lower nutrient contents. These results indicate an enhancement of nutrient content in mycorrhizal M. sativa plants during water stress that affected leaf water relations.
机译：紫花苜蓿简历。给阿拉贡植物接种faglocia fasciculatum（M）和/或Meliz根瘤菌菌株102 F51（R）或不接种（N）。在所有处理中，非菌根植物均补充有磷，非结瘤植物均补充有氮，以达到相似的大小和养分含量。使用两个循环的水分胁迫和恢复，使植物保持饱满的压力或水分胁迫。 N和R植物的叶片在完全膨大时具有降低的渗透势和增加的压力势，而在水分胁迫下，总体弹性模量或质外性水分的百分比均无变化。相比之下，M和MR叶片在水分胁迫下的渗透势和膨胀势均无变化，但质外生水的体积和细胞弹性却有所增加（降低了体积模量）。水分胁迫降低了未接种植物叶片和根的养分含量。 R植物显示出叶片的养分含量降低，但在根部保持了一些微量元素。 M植物的叶片养分含量与N植物相似。但是，M和MR植物的根中营养成分明显较低。这些结果表明，在水分胁迫期间，影响根系水分关系的菌根M. sativa植物中营养成分的增加。

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