Linking mycorrhizal fungi and soil nutrients to vegetative and reproductive ruderal plant development in a fragmented forest at central Argentina
Linking mycorrhizal fungi and soil nutrients to vegetative and reproductive ruderal plant development in a fragmented forest at central Argentina
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DOI：
10.1016/j.foreco.2013.08.052
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发表时间：
2013-12-15
影响因子：
3.7
通讯作者：
Galetto, L.
中科院分区：
文献类型：
--
作者：
Grilli, G.;Urcelay, C.;Galetto, L.
我们研究了菌根真菌，养分供应和植物发育在几个网站的碎片查科森林之间的实际联系。具体而言，我们评估了是否丛枝菌根真菌（AMF）和暗隔膜内生菌（DSE）的殖民化和土壤养分的可用性与生长（生物量和株高）和繁殖性状（花粉大小和花粉和果实生产）的两个杂草，一年生，同属大戟属物种沿着梯度的森林破碎化。我们评估了森林片段的大小和隔离，养分供应，菌根真菌变量和植物发育之间的关系，在11 Chaquean森林片段（0.5-1000公顷）沉浸在阿根廷中部的农业景观。菌根定殖不相关的森林片段隔离，正相关的森林片段大小和负相关的土壤养分有效性在两个主机沿着破碎化梯度。植物的生殖和营养性状与菌根侵染有关。在一般情况下，株高，生物量和果实产量呈负相关AMF，花粉产量呈正相关DSE，在杂草主机（本地和外来）。我们发现显着的关系沿着森林碎片化梯度，可靠地链接森林碎片的大小，以降低养分的可用性和增加菌根定植在本地/外来杂草主机，而负相关AMF殖民植物发育和繁殖成功。(C)2013 Elsevier B. V.保留所有权利。
We studied the actual links between mycorrhizal fungi, nutrient availability and plant development in several sites of fragmented Chaco forests. Specifically, we evaluated whether arbuscular mycorrhizal fungi (AMF) and dark septate endophytes (DSE) colonization and availability of soil nutrients are related to growth (biomass and plant height) and reproductive traits (pollen size and pollen and fruit production) of two ruderal, annual, congeneric Euphorbia species along a gradient of forest fragmentation. We assessed relationships between forest fragment size and isolation, nutrient availability, mycorrhizal fungal variables and plant development at eleven Chaquean forest fragments (0.5-1000 ha) immersed in an agricultural landscape in central Argentina. Mycorrhizal colonization was not related to forest fragment isolation, positively related to forest fragment size and negatively related to soil nutrient availability in both hosts along the fragmentation gradient. Plant reproductive and vegetative traits were related to mycorrhizal colonization. In general, plant height, biomass, and fruit production were negatively related to AMF, and pollen production was positively related to DSE, in both ruderal hosts (native and exotic). We found remarkable relationships along a forest fragmentation gradient that reliably link forest fragment size to lower nutrient availability and increased mycorrhizal colonization in native/exotic ruderal hosts, while negatively linking AMF colonization to plant development and reproductive success. (C) 2013 Elsevier B.V. All rights reserved.