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Arbuscular mycorrhizal fungi colonize decomposing leaves of Myrica parvifolia, M. pubescens and Paepalanthus sp. | LitMetric

AI Article Synopsis

  • Hyphae and vesicles from arbuscular mycorrhizal fungi (AMF) were discovered in decomposing leaves of specific plant species at montane sites in Colombia.
  • The highest rates of AMF colonization were found in the most decomposed leaves, particularly near roots, while colonization in roots did not vary significantly by decomposition layer.
  • AMF likely enter decomposing leaves through vascular tissue, allowing them to effectively recycle nutrients released by decomposers before these nutrients are lost from the soil.

Article Abstract

Hyphae and vesicles of arbuscular mycorrhizal fungi (AMF) were found within the decomposing leaves of Myrica parvifolia, M. pubescens and Paepalanthus sp. at three montane sites in Colombia. Hyphae, vesicles, and arbuscule-like structures were also found within scale-like leaves of the rhizomes of Paepalanthus sp. The litter found in the vicinity of the roots was divided into three decomposition layers. The highest AMF colonization occurred in the most decomposed leaves, which were in close association with roots. In contrast, there were no differences in AMF colonization of roots present in the different decomposition layers. Colonization of decomposing leaves by AMF did not differ between the two closely related species M. parvifolia and M. pubescens, nor between two sites (Guatavita and Zipacón, Colombia) differing in soil fertility. Occurrence of vesicles in decomposing leaves was correlated with abundant AMF extraradical hyphae among the leaves. We propose that AMF enter decomposing leaves mechanically through vascular tissue. As a consequence, AMF are well positioned to obtain and efficiently recycle mineral nutrients released by decomposer microorganisms before their loss by leaching or immobilization in soil.

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Source
http://dx.doi.org/10.1007/s00572-003-0259-0DOI Listing

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