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Local adaptation of mycorrhizae communities changes plant community composition and increases aboveground productivity.
Oecologia ( IF 2.7 ) Pub Date : 2020-01-27 , DOI: 10.1007/s00442-020-04598-9
Jonathan T Bauer 1, 2 , Liz Koziol 3 , James D Bever 3, 4
Affiliation  

Soil microbial communities can have an important role in the adaptation of plants to their local abiotic soil conditions and in mediating plant responses to environmental stress. This has been clearly demonstrated for individual plant species, but it is unknown how locally adapted microbes may affect plant communities. It is possible that the adaptation of microbial communities to local conditions can shape plant community composition. Additionally, it is possible that the effects of locally adapted microorganisms on individual plant species could be altered by co-occurring plant species. We tested these possibilities in plant community mesocosms with soils and mycorrhizal fungi (AMF) from three locations. We found that plant community biomass responded positively to local adaptation of AMF to soil conditions. Plant community composition also changed in response to local adaptation of AMF. Unexpectedly, the strongest benefits of locally adapted AMF went to early successional plant species that have the highest relative growth rates and the lowest responsiveness to the presence of AMF. Late successional plants that responded positively overall to the presence of AMF were often suppressed in communities with local AMF, perhaps because of strong competition from fast growing plant species. These results show that local adaptation of soil microbial communities can shape plant community composition, and the benefits that plants derive from locally adapted microorganisms can be reshaped by the competitive context in which these associations occur.

中文翻译:

菌根群落的局部适应性改变了植物群落的组成并提高了地上生产力。

土壤微生物群落在植物适应当地非生物土壤条件以及介导植物对环境胁迫的反应中可以发挥重要作用。对于单个植物物种已经清楚地证明了这一点,但是尚不了解当地适应的微生物如何影响植物群落。微生物群落适应当地条件可能会影响植物群落的组成。另外,有可能通过共生植物物种改变局部适应微生物对单个植物物种的影响。我们在来自三个地点的土壤和菌根真菌(AMF)的植物群落中膜试验了这些可能性。我们发现植物群落生物量对AMF对土壤条件的局部适应具有积极的响应。植物群落组成也响应于AMF的局部适应而改变。出乎意料的是,本地适应的AMF的最大优势在于具有较高相对生长速率且对AMF的响应性最低的早期演替植物物种。在当地有AMF的社区中,对AMF的存在总体上产生积极反应的后期演替植物通常被抑制,这可能是由于来自快速生长的植物物种的强烈竞争。这些结果表明,土壤微生物群落的局部适应可以影响植物群落的组成,而植物产生自局部适应微生物的益处可以通过发生竞争的环境而得以重塑。本地适应的AMF的最大优势在于具有相对增长率最高且对AMF存在的响应性最低的早期演替植物物种。在当地有AMF的社区中,对AMF的存在总体上产生积极反应的后期演替植物通常被抑制,这可能是由于来自快速生长的植物物种的强烈竞争。这些结果表明,土壤微生物群落的局部适应可以影响植物群落的组成,而植物产生自局部适应微生物的益处可以通过发生竞争的环境而得以重塑。本地适应的AMF的最大优势在于具有相对增长率最高且对AMF存在的响应性最低的早期演替植物物种。在当地具有AMF的社区中,对AMF的存在总体上产生积极反应的后期演替植物通常受到抑制,这可能是由于来自快速生长的植物物种的强烈竞争。这些结果表明,土壤微生物群落的局部适应可以影响植物群落的组成,而植物产生自局部适应微生物的益处可以通过发生竞争的环境而得以重塑。在当地具有AMF的社区中,对AMF的存在总体上产生积极反应的后期演替植物通常受到抑制,这可能是由于来自快速生长的植物物种的强烈竞争。这些结果表明,土壤微生物群落的局部适应可以影响植物群落的组成,而植物产生自局部适应微生物的益处可以通过发生竞争的环境而得以重塑。在当地具有AMF的社区中,对AMF的存在总体上产生积极反应的后期演替植物通常受到抑制,这可能是由于来自快速生长的植物物种的强烈竞争。这些结果表明,土壤微生物群落的局部适应可以影响植物群落的组成,而植物产生自局部适应微生物的益处可以通过发生竞争的环境而得以重塑。
更新日期:2020-04-09
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