Soil nematodes modify interactions between nitrogen-fixing and non-fixing tree seedlings from late, but not early, successional stages

IF 3.9 2区农林科学 Q1 AGRONOMY

Plant and Soil Pub Date : 2024-08-30 DOI:10.1007/s11104-024-06906-1

P. Gilarte, J. M. Plett, E. Pendall, Y. Carrillo, U. N. Nielsen

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引用次数: 0

Abstract

Aims

Plant community dynamics are influenced by interspecific interactions. Previous studies have shown that soil organisms play a key role in such interactions, but few studies have quantified soil fauna contributions.

Methods

We investigated the effects of root lesion (RLN) and bacterial feeding (BFN) nematodes on the interaction between seedlings of nitrogen-(N)-fixing tree species of Acacia and non-fixing Banksia from early and late successional stages of a temperate forest in a pot experiment.

Results

Nematodes had consistent, albeit minor, negative effects on both N-fixers and non-fixers in the early successional stage scenario. By contrast, BFNs increased biomass production of both species in late-stage monocultures and in Banksia in mixed cultures. Moreover, RLNs negatively affected late-stage Banksia in monocultures but promoted its biomass production when grown with Acacia. Reduced ¹⁵N concentration in Banksia indicates that the switch was driven by transfer of N from Acacia facilitated by RLN.

Conclusions

Soil nematodes thus moderate interspecific interactions differently in early and late successional stages.

Abstract Image

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土壤线虫改变了固氮树苗和非固氮树苗之间的相互作用，但不是早期的继代阶段

目的植物群落动态受种间相互作用的影响。以往的研究表明，土壤生物在这种相互作用中起着关键作用，但很少有研究对土壤动物的贡献进行量化。我们在盆栽实验中研究了根部病变线虫（RLN）和细菌取食线虫（BFN）对温带森林早、晚演替阶段固氮树种相思树和非固氮树种银杏幼苗之间相互作用的影响。相比之下，BFNs 提高了晚期单一栽培中两种植物的生物量产量，也提高了混合栽培中银杏的生物量产量。此外，RLNs 对单株栽培的晚期银杏有负面影响，但在与金合欢一起生长时则会促进其生物量的产生。银合欢中 15N 浓度的降低表明，这一转变是由 RLN 促进相思树的氮转移驱动的。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Plant and Soil 农林科学-农艺学

CiteScore

8.20

自引率

8.20%

发文量

543

审稿时长

2.5 months

期刊介绍： Plant and Soil publishes original papers and review articles exploring the interface of plant biology and soil sciences, and that enhance our mechanistic understanding of plant-soil interactions. We focus on the interface of plant biology and soil sciences, and seek those manuscripts with a strong mechanistic component which develop and test hypotheses aimed at understanding underlying mechanisms of plant-soil interactions. Manuscripts can include both fundamental and applied aspects of mineral nutrition, plant water relations, symbiotic and pathogenic plant-microbe interactions, root anatomy and morphology, soil biology, ecology, agrochemistry and agrophysics, as long as they are hypothesis-driven and enhance our mechanistic understanding. Articles including a major molecular or modelling component also fall within the scope of the journal. All contributions appear in the English language, with consistent spelling, using either American or British English.