Plant-soil feedbacks from 30-year family-specific soil cultures: phylogeny, soil chemistry and plant life stage.
Plant-soil feedbacks from 30-year family-specific soil cultures: phylogeny, soil chemistry and plant life stage.
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DOI：
10.1002/ece3.1487
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发表时间：
2015-06
影响因子：
2.6
通讯作者：
Lewis, Owen T.
中科院分区：
文献类型：
--
作者：
Mehrabi, Zia;Bell, Thomas;Lewis, Owen T.
关键词：
种内负反馈效应在植物群落中被广泛地记录下来，即在受同种物质调节的土壤上性能降低。然而，种间反馈的研究较少，其方向、强度、原因和后果也鲜为人知。如果更接近的物种共享病原体，或者有相似的土壤资源需求，植物在受更远的系统发育亲戚影响的土壤上可能表现得更好。在植物生活的各个阶段，很少有对这一预测的实证测试，而且没有一项测试试图解释土壤化学。在这里，我们测试了系统发育预测土壤反馈对植物生存和表现(萌发、幼苗存活、生长速度、生物量)的影响的效用。我们实施了一个完整的析因实验，在五个植物科特定的土壤来源上种植代表五个科的物种。我们的实验利用了牛津大学植物园植物家族专用床上培养了30多年的土壤。植物对土壤来源的反应是特殊的，物种在由系统发育较远的近亲培养的土壤上表现不佳。然而，反馈效应的大小和符号可以通过“家”和“走”土壤的化学性质的差异来解释。此外，土壤化学相关的植物-土壤反馈的方向取决于植物的生活阶段，而土壤化学对萌发成活率和生物量积累的影响则相反。我们的结果(1)表明，植物家族之间的系统发育距离不能预测多个生命阶段的植物-土壤反馈；(2)强调了将土壤化学变化作为种群反应的重要驱动因素的必要性。植物生活阶段的不同反应表明，集中在植物种群的短暂阶段(例如，萌发成功)的研究可能不能给出植物-土壤反馈效应的全貌。
Intraspecific negative feedback effects, where performance is reduced on soils conditioned by conspecifics, are widely documented in plant communities. However, interspecific feedbacks are less well studied, and their direction, strength, causes, and consequences are poorly understood. If more closely related species share pathogens, or have similar soil resource requirements, plants may perform better on soils conditioned by more distant phylogenetic relatives. There have been few empirical tests of this prediction across plant life stages, and none of which attempt to account for soil chemistry. Here, we test the utility of phylogeny for predicting soil feedback effects on plant survival and performance (germination, seedling survival, growth rate, biomass). We implement a full factorial experiment growing species representing five families on five plant family-specific soil sources. Our experiments exploit soils that have been cultured for over 30 years in plant family-specific beds at Oxford University Botanic Gardens. Plant responses to soil source were idiosyncratic, and species did not perform better on soils cultured by phylogenetically more distant relatives. The magnitude and sign of feedback effects could, however, be explained by differences in the chemical properties of “home” and “away” soils. Furthermore, the direction of soil chemistry-related plant-soil feedbacks was dependent on plant life stage, with the effects of soil chemistry on germination success and accumulation of biomass inversely related. Our results (1) suggest that the phylogenetic distance between plant families cannot predict plant–soil feedbacks across multiple life stages, and (2) highlight the need to consider changes in soil chemistry as an important driver of population responses. The contrasting responses at plant life stages suggest that studies focusing on brief phases in plant demography (e.g., germination success) may not give a full picture of plant–soil feedback effects.
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DOI：
10.1073/pnas.0607968104
发表时间：
2007-03-20
影响因子：
11.1
作者：
Gilbert, Gregory S.;Webb, Campbell O.
通讯作者：
Webb, Campbell O.
影响因子：
5.5
作者：
Fukami, Tadashi;Nakajima, Mifuyu
通讯作者：
Nakajima, Mifuyu
影响因子：
2.9
作者：
MACARTHUR R;LEVINS, R
通讯作者：
LEVINS, R
影响因子：
1.7
作者：
Bonanomi, Giuliano;Rietkerk, Max;Mazzoleni, Stefano
通讯作者：
Mazzoleni, Stefano
影响因子：
4.8
作者：
BEVER, JD
通讯作者：
BEVER, JD