Root endophytes of lupin and some other legumes in Northwestern USA

O'Dell, Thomas E.; Trappe, James M.

doi:10.1111/j.1469-8137.1992.tb00076.x

Cited by 30 publications

(17 citation statements)

References 43 publications

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“…The lack of earthworm effect on the legume might be explained by a lower dependency on soil nitrogen availability due its symbiosis with N 2 ‐fixing bacteria (Wurst et al 2003). The effect of AMF on L. polyphyllus was consistent with our expectation that an AMF‐responsive plant species should profit from AMF presence, since L. polyphyllus is colonized by AMF in the field (Odell & Trappe 1992) and the growth of legumes is often promoted by AMF (Scheublin et al 2007; Karanika et al 2008). Contrary to our hypothesis that the newcomer grass would profit from earthworm presence, earthworms had no effects on E. minor , while AMF increased the weight of the few establishing seedlings of this exotic grass.…”

Section: Discussionsupporting

confidence: 87%

Independent effects of arbuscular mycorrhiza and earthworms on plant diversity and newcomer plant establishment

Wurst

Gebhardt

Rillig

2011

Journal of Vegetation Science

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Questions: How do arbuscular mycorrhiza and earthworms affect the structure and diversity of a ruderal plant community? Is the establishment success of newcomer plants enhanced by these soil organisms and their interactions?Methods: We grew a native ruderal plant community composed of different functional groups (grasses, legumes and forbs) in the presence and absence of arbuscular mycorrhizal fungi (AMF) and endogeic earthworms in mesocosms. We introduced seeds of five, mainly exotic, plant species from the same functional groups after a disturbance simulating mowing. The effects of the soil organisms on the native ruderal plant community and seedling establishment of the newcomer plants were assessed.Results: After disturbance, the total above-ground regrowth of the native plant community was not affected by the soil organisms. However, AMF increased plant diversity and shoot biomass of forbs, but decreased shoot biomass of grasses of the native plant community. Earthworms led to a reduction in total root biomass. Establishment of the introduced newcomer plants increased in the presence of AMF and earthworms. Especially, seedling establishment of the introduced non-native legume Lupinus polyphyllus and the native forb Plantago lanceolata was promoted in the presence of AMF and earthworms, respectively. The endogeic earthworms gained more weight in the presence of AMF and led to increased extraradical AMF hyphal length in soil. However, earthworms did not seem to modify the effect of AMF on the plant community.Conclusion: The present study shows the importance of mutualistic soil organisms in mediating the establishment success of newcomer plants in a native plant community. Mutualistic soil organisms lead to changes in the structure and diversity of the native plant community and might promote newcomer plants, including exotic species.

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Section: Discussionsupporting

confidence: 87%

Independent effects of arbuscular mycorrhiza and earthworms on plant diversity and newcomer plant establishment

Wurst

Gebhardt

Rillig

2011

Journal of Vegetation Science

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“…This colonization is unusual, since the genus Lupinus is considered to be non-mycorrhizal (Jones 1924;Avio et al 1990;Vierheilig et al 1994;Oba et al 2001Oba et al , 2002. However, mycorrhizal colonization is known to occur in some lupins (Trinick 1977;Allen et al 1984;O'Dell and Trappe 1992), but the plants do not benefit nutritionally from the association (Lambers and Teste 2013). Similarly, the lower N and P concentrations observed in the present study for MF treated plants indicate that L. angustifolius gained no nutritional benefit, while allocating some nutritional resources to the mycorrhizal symbionts.…”

Section: Discussioncontrasting

confidence: 63%

The role of Cryptococcus laurentii and mycorrhizal fungi in the nutritional physiology of Lupinus angustifolius L. hosting N2-fixing nodules

et al. 2016

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Background and aims The benefits of biological nitrogen fixation (BNF) for blue lupin (Lupinus angustifolius L.) are well known. However, it is unclear how multiple microorganisms, other than plant growth promoting rhizobacteria, affect this legume's BNF and growth. Therefore, we evaluated the impact of mycorrhizal fungi and a yeast on growth and nutrition of nodulated blue lupin. Methods We isolated Cryptococcus laurentii from the rhizosphere of blue lupin. Nodulated L. angustifolius seedlings, treated with either C. laurentii (CL) or mycorrhizal fungi (MF) or with both symbionts (CLMF), were cultivated in sterile silica sand in a glasshouse for one month. The treatments' effects were investigated by analyzing the plants' biomass parameters, symbiotic colonization and mineral nutrition. Results The MF treatment had no effect on the plants, while growth, BNF efficiency and the nutrition of CL treated plants were improved. CLMF treated plants demonstrated increased growth and nodule relative growth rate, while utilizing nitrogen resources efficiently for growth.Conclusions Growth and nutritional physiology of L. angustifolius were affected via different mechanisms. Improved growth of CL treated plants was underpinned by increased BNF efficiency; while greater nodulation and efficient growth on nitrogen resources supported the increased biomass of CLMF treated plants.

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“…Emphasis is placed on how these relationships may be used to promote plant growth and enhance biological disease control in a manner consistent with the principles guiding sustainable agricultural development. (Carroll, 1988;Clay, 1988), including the mycorrhizal fungi (O'Dell and Trappe, 1992). However, for the purpose of this review the definition of endophyte will include 'fungi or bacteria, which for all or part of their life cycle invade the tissues of living plants and cause unapparent and asymptomatic infections entirely within plant tissues, but cause no symptoms of disease' (Wilson, 1995).…”

Section: A Overviewmentioning

confidence: 99%

Bacterial Endophytes: Potential Role in Developing Sustainable Systems of Crop Production

Sturz

Christie

Nowak

2000

Critical Reviews in Plant Sciences

492

253

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Root endophytes of lupin and some other legumes in Northwestern USA

Cited by 30 publications

References 43 publications

Independent effects of arbuscular mycorrhiza and earthworms on plant diversity and newcomer plant establishment

Independent effects of arbuscular mycorrhiza and earthworms on plant diversity and newcomer plant establishment

The role of Cryptococcus laurentii and mycorrhizal fungi in the nutritional physiology of Lupinus angustifolius L. hosting N2-fixing nodules

Bacterial Endophytes: Potential Role in Developing Sustainable Systems of Crop Production

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