FEEDBACK BETWEEN PLANTS AND THEIR SOIL COMMUNITIES IN AN OLD FIELD COMMUNITY
FEEDBACK BETWEEN PLANTS AND THEIR SOIL COMMUNITIES IN AN OLD FIELD COMMUNITY
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DOI：
10.2307/1941601
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发表时间：
1994-10-01
期刊：
影响因子：
4.8
通讯作者：
BEVER, JD
中科院分区：
文献类型：
--
作者：
BEVER, JD
植物和它们的土壤群落之间的相互作用的性质进行了调查，通过测试的差异反应的四个老领域多年生植物物种接种来自土壤群落，已与（“培养”）这四种植物物种之一。土壤群落的分化是明显的，在植物存活，物候，生长和根冠比的测量。对生存和生长的影响表明，这些物种和它们所培养的土壤群落之间存在负反馈。Krigia的存活率显着降低时，与他们的“自己”的土壤社区。考虑到作为一个整体，其他三个物种（所有草）有显着较低的增长和根冠比时，生长与土壤社区开始与自己的接种物相比，土壤社区开始与其他物种的接种。然而，这种影响对生长速率和根冠比的意义主要是由于两两比较的飞机花和蒲公英和花和黍sphaerocarpon。丹花属和黍属的成对比较并不表明彼此对土壤的生长速度或根冠比有不同的反应，土壤群落也似乎不影响这两个物种的相对竞争能力。虽然尚未确定造成这些影响的土壤群落成分，但在使用由洗净的活根段组成的接种物的实验中观察到类似但不太明显的模式，与使用整个土壤作为接种物的实验相比，这表明根病原体是一种重要的病原体。
The nature of the interaction between plants and their soil community was investigated by testing for differential responses of four old-field perennial plant species to inocula derived from soil communities that had been grown with (''cultured by'') one of these four plant species. The differentiation of the soil communities was evident in measurements of plant survival, phenology, growth, and root-shoot ratios. Effects on survival and growth suggest negative feedbacks between these species and the soil communities that they culture. Survival rates of Krigia dandelion were significantly reduced when grown with their ''own'' soil community. Considered as a whole, the three other species (all grasses) had significantly lower growth and root-shoot ratios when grown with soil communities started with their own inocula compared to soil communities started with the inocula of other species. However, the significance of this effect on growth rate and root-shoot ratios was due primarily to the pairwise comparison of Anthoxanthum odoratum and Danthonia spicata and of Anthoxanthum and Panicum sphaerocarpon, respectively. Pairwise comparisons of Danthonia and Panicum do not suggest differential responses to each other's soils in growth rate or root-shoot ratios nor do soil communities appear to affect the relative competitive ability of these two species. While the components of the soil community responsible for these effects have not been identified, similar although less pronounced patterns were observed in experiments using inocula consisting of washed live root segments as compared to experiments using whole soil as inoculum, suggesting that root pathogens are one important agent.