Xyloglucan is released by plants and promotes soil particle aggregation.
Xyloglucan is released by plants and promotes soil particle aggregation.
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DOI：
10.1111/nph.14897
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发表时间：
2018-03
期刊：
影响因子：
--
通讯作者：
Knox JP
中科院分区：
文献类型：
--
作者：
Galloway AF;Pedersen MJ;Merry B;Marcus SE;Blacker J;Benning LG;Field KJ;Knox JP
土壤是生物圈的重要组成部分，是有机碳的主要储存库。众所周知，植物根系会向土壤中释放多种碳基化合物，包括多糖，但这些化合物的功能尚不清楚。利用对植物细胞壁木葡聚糖的单克隆抗体，我们发现这种多糖在被子植物的根中广泛分泌，并且在草中相对丰富。它也从最早的陆地植物分化谱系——苔类植物的类根中释放出来。通过水稳性团聚体粒径分析、干分散颗粒分析和扫描电镜分析，我们发现木葡聚糖有效地增加了土壤颗粒团聚体，这是健康土壤形成和功能的关键因素。为了研究木葡聚糖在土壤形成中的可能作用，我们分析了在冰川退缩时暴露的已知年龄的矿物土壤的木葡聚糖含量。这些冰川前田土壤的木葡聚糖含量明显高于英国草原土壤。我们认为，从植物根/根释放的木葡聚糖是一种有效的土壤颗粒聚集剂，并且在这种作用下，可能在土地的初始定植中起重要作用。
Soil is a crucial component of the biosphere and is a major sink for organic carbon. Plant roots are known to release a wide range of carbon‐based compounds into soils, including polysaccharides, but the functions of these are not known in detail. Using a monoclonal antibody to plant cell wall xyloglucan, we show that this polysaccharide is secreted by a wide range of angiosperm roots, and relatively abundantly by grasses. It is also released from the rhizoids of liverworts, the earliest diverging lineage of land plants. Using analysis of water‐stable aggregate size, dry dispersion particle analysis and scanning electron microscopy, we show that xyloglucan is effective in increasing soil particle aggregation, a key factor in the formation and function of healthy soils. To study the possible roles of xyloglucan in the formation of soils, we analysed the xyloglucan contents of mineral soils of known age exposed upon the retreat of glaciers. These glacial forefield soils had significantly higher xyloglucan contents than detected in a UK grassland soil. We propose that xyloglucan released from plant rhizoids/roots is an effective soil particle aggregator and may, in this role, have been important in the initial colonization of land.
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影响因子：
5.8
作者：
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通讯作者：
Dolan, Liam
影响因子：
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Dittmer, HJ
通讯作者：
Dittmer, HJ