Interactions of Marsh Orchid (Dactylorhiza spp.) and Soil Microorganisms in Relation to Extracellular Enzyme Activities in a Peat Soil

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Interactions of Marsh Orchid (Dactylorhiza spp.) and Soil Microorganisms in Relation to Extracellular Enzyme Activities in a Peat Soil

机译：泥炭土壤中沼泽兰花（Dactylorhiza spp。）与土壤微生物的相互作用与细胞外酶活性的关系

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The nature of the interactions between microbes and roots of plants in a peaty soil were studied in a laboratorybased experiment by measuring activities of β-glucosidase, phosphatase, N-acetylglucosaminidase, and arylsulphatase. The experiment was based on control (autoclaved), bacteria-inoculated, and plant (transplanted with Dactylorhiza) treatments,and samples were collected over 4 sampling intervals. Higher enzyme activities were associated with the bacteria-inoculated treatment, suggesting that soil enzyme activities are mainly of microbial origin. For example, β-glucosidase activity varied between 25-30 μmol g-1 min-1 in the bacteria-inoculated samples whilst the activity of the control ranged between 4-12μmol g-1 min-1. A similar pattern was found for all other enzymes.At the end of the incubation, the microcosms were destructively sampled and the enzyme activities determined in bulk soil, rhizospheric soil, and on the root surface. Detailed measurement in different fractions of the peat indicated that higher activities were found in rhizosphere. However, the higher activities ofβ-glucosidase, N-acetylglucosaminidase, and arylsulphatase appeared to be associated with bacterial proliferation on the root surface, whilst a larger proportion of phosphatase appeared to be released from root surface.

机译：通过测量β-葡萄糖苷酶，磷酸酶，N-乙酰氨基葡糖苷酶和芳基硫酸酯酶的活性，在实验室为基础的实验中研究了豌豆土壤中微生物与植物根系之间相互作用的性质。实验基于对照（高压灭菌），细菌接种和植物（根瘤菌移植）处理，并在4个采样间隔内收集样品。较高的酶活性与接种细菌的处理有关，表明土壤酶活性主要来自微生物。例如，细菌接种样品中的β-葡萄糖苷酶活性在25-30μmolg-1 min-1之间变化，而对照的活性在4-12μmolg-1 min-1之间变化。在所有其他酶中都发现了类似的模式。在培养结束时，破坏性地取样了微观世界，并在块状土壤，根际土壤和根表面确定了酶活性。对泥炭不同部分的详细测量表明，在根际中发现了更高的活性。然而，β-葡萄糖苷酶，N-乙酰氨基葡糖苷酶和芳基硫酸酯酶的较高活性似乎与细菌在根表面的增殖有关，而较大比例的磷酸酶似乎是从根表面释放的。

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《土壤圈（英文版）》 |2007年第6期|681-687|共7页
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作者单位

Department of Civil and Environmental Engineering, Yonsei University, Seoul 120-749 Korea;

School of Biological Sciences, University of Wales, Bangor, LL57 2UW UK;

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收录信息中国科学引文数据库(CSCD);中国科技论文与引文数据库(CSTPCD);
原文格式 PDF
正文语种 chi
中图分类农业基础科学;
关键词
Dactylorhiza, extracellular enzyme, peat, rhizosphere, wetland;

机译：根瘤菌;细胞外酶;泥炭;根际;湿地;

Interactions of Marsh Orchid (Dactylorhiza spp.) and Soil Microorganisms in Relation to Extracellular Enzyme Activities in a Peat Soil

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