Arbuscular mycorrhizal associations and occurrence of dark septate endophytes in the roots of Brazilian weed plants

Massenssini, André Marcos; Bonduki, Victor Hugo Araújo; Tótola, Marcos Rogério; Ferreira, Francisco Affonso; Costa, Maurício Dutra

doi:10.1007/s00572-013-0519-6

Cited by 33 publications

(26 citation statements)

References 29 publications

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“…This is similar to studies where a high proportion of dual colonization of AM and DSE fungi in roots of plant species examined have been reported (Massenssini et al 2014;Majewska et al 2015). Our observation of a negative correlation between %RLTC and %RLDTC is in agreement with studies where an inverse relationship between these fungal variables has been reported (Muthukumar et al 2006;Mandyam & Jumpponen 2008;Muthukumar & Tamilselvi 2010).…”

Section: Relationship Between Am and Dse Fungisupporting

confidence: 92%

Root fungal associations in some non-orchidaceous vascular lithophytes

2016

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Plant roots in natural ecosystems are colonized by a diverse group of fungi among which the most common and widespread are arbuscular mycorrhizal (AM) and dark septate endophyte (DSE) fungi. Th ough AM and DSE fungal associations are well reported for terricolous plant species, they are rather poorly known for lithophytic plant species. In this study, we examined AM and DSE fungal association in 72 non-orchidaceous vascular plant species growing as lithophytes in Siruvani Hills, Western Ghats of Tamilnadu, India. Sixty-nine plant species had AM and 58 species had DSE fungal associations. To our knowledge, we report AM fungal association in 42 and DSE fungal association in 53 plant species for the fi rst time. Th ere were signifi cant diff erences in total root length colonization and root length colonized by diff erent AM and DSE fungal structures among plant species. In contrast, the diff erences in AM and DSE fungal colonization among plants in various life-forms and lifecycles were not signifi cant. AM morphology reported for the fi rst time in 56 plant species was dominated by intermediate type AM morphology. A signifi cant negative relationship existed between total root length colonized by AM and DSE fungi. Th ese results clearly suggest that AM and DSE fungal associations are widespread in lithophytes.

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Section: Relationship Between Am and Dse Fungisupporting

confidence: 92%

Root fungal associations in some non-orchidaceous vascular lithophytes

2016

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“…Weeds have a similar behavior to that of invasive plants found in various natural ecosystems (Reinhart & Callaway, 2006). Recent studies have demonstrated that weeds are able to associate with arbuscular mycorrhizal fungi (Santos et al, 2013;Massenssini et al, 2014) and that the effects of this association may vary from positive to negative, depending on the environmental conditions (Massenssini, 2014). Furthermore, the presence of a competing plant may alter weed root colonization by AMF.…”

Section: The Role Of Soil Microorganisms On the Interactions Between mentioning

confidence: 99%

“…The high competitive ability of weeds is partially explained by the biological characteristics of these plants, which have morphological and physiological adaptations in their root systems, allowing for greater absorption of water and nutrients from the soil (Carvalho et al, 2011). Furthermore, associations between weeds and soil microorganisms can promote increases in growth as well as resistance to pathogens (Brundrett, 2004;Massenssini et al, 2014). On the other hand, commercial crops tend to have lower competitive ability due to the selection process of cultivars, based on the control of competitors and high nutrient inputs through fertilization, leading to the selection of those less dependent on ecological processes and highly adapted to artificial conditions (Altieri, 1999).…”

Section: Introductionmentioning

confidence: 99%

Soil microorganisms and their role in the interactions between weeds and crops

et al. 2014

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-The competition between weeds and crops is a topic of great interest, since this interaction can cause heavy losses in agriculture. Despite the existence of some studies on this subject, little is known about the importance of soil microorganisms in the modulation of weed-crop interactions. Plants compete for water and nutrients in the soil and the ability of a given species to use the available resources may be directly affected by the presence of some microbial groups commonly found in the soil. Arbuscular mycorrhizal fungi (AMF) are able to associate with plant roots and affect the ability of different species to absorb water and nutrients from the soil, promoting changes in plant growth. Other groups may promote positive or negative changes in plant growth, depending on the identity of the microbial and plant partners involved in the different interactions, changing the competitive ability of a given species. Recent studies have shown that weeds are able to associate with mycorrhizal fungi in agricultural environments, and root colonization by these fungi is affected by the presence of other weeds or crops species. In addition, weeds tend to have positive interactions with soil microorganisms while cultures may have neutral or negative interactions. Competition between weeds and crops promotes changes in the soil microbial community, which becomes different from that observed in monocultures, thus affecting the competitive ability of plants. When grown in competition, weeds and crops have different behaviors related to soil microorganisms, and the weeds seem to show greater dependence on associations with members of the soil microbiota to increase growth. These data demonstrate the importance of soil microorganisms in the modulation of the interactions between weeds and crops in agricultural environments. New perspectives and hypotheses are presented to guide future research in this area.Keywords: competition, agriculture, mycorrhizal fungi, PGPR, ecology. RESUMO -A competição entre plantas daninhas e culturas é um tópico de grande interesse, uma vez que essa interação pode causar grandes perdas na agricultura. Apesar de alguns estudos nesse tema, pouco se sabe sobre a importância dos microrganismos do solo na modulação dessa interação. As plantas competem por água e nutrientes presentes no solo e a capacidade das espécies em absorver esses recursos pode ser diretamente afetada pela presença de alguns grupos microbianos comumente encontrados no solo. Os fungos micorrízicos arbusculares (FMA) são capazes de se associar com as raízes das plantas, o que afeta a capacidade das diferentes espécies em absorver água e nutrientes do solo, promovendo alterações no crescimento. Outros grupos podem promover alterações positivas ou negativas no crescimento das espécies vegetais, a depender da identidade das espécies microbianas e vegetais envolvidas nas diferentes interações

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“…Até o presente momento, também nada se sabe sobre a ocorrência de DSE em associação com espécies arbóreas da Mata Atlântica. Por enquanto, a presença dos DSE só foi verificada em algumas espécies arbóreas e herbáceas, em área de cerrado em Minas Gerais (DETMANN et al, 2008;SANTOS et al, 2013), espécies aquáticas, coletadas na Bacia do Rio Paraná (MARINS et al, 2009), em raízes de Oryza glumaepatula na Amazônia ) e em raízes de 29 espécies de ervas daninhas (MASSENSSINI et al, 2014).…”

Section: Introductionunclassified

“…Os DSE crescem dentro e entre células epidérmicas e corticais das raízes primárias e secundárias (SIEBER, 2002;SIEBER;GRÜNIG, 2006). Atualmente, pesquisas sobre os DSE têm recebido cada vez mais interesse, entretanto a maioria dos estudos trata apenas da ocorrência desse grupo de fungos nos mais diversos ambientes (MARINS, 2009;PEREIRA et al, 2011;MASSENSSINI et al, 2014). De fato, os DSE são abundantes e têm sido relatados em diversos hospedeiros, compreendendo mais de 600 espécies de plantas (JUMPPONEN;JUMPPONEN et al, 2001; e em ambientes com condições extremas, como solos contaminados por metais pesados (BAN et al, 2012;ZHAO et al, 2015), com estresse hídrico , salino (WALLER et al, 2005) e com elevada acidez .…”

Section: Introductionunclassified

Fungos micorrízicos arbusculares e endofíticos dark septate em áreas de Mata Atlântica em um gradiente altitudinal

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Arbuscular mycorrhizal associations and occurrence of dark septate endophytes in the roots of Brazilian weed plants

Cited by 33 publications

References 29 publications

Root fungal associations in some non-orchidaceous vascular lithophytes

Root fungal associations in some non-orchidaceous vascular lithophytes

Soil microorganisms and their role in the interactions between weeds and crops

Fungos micorrízicos arbusculares e endofíticos dark septate em áreas de Mata Atlântica em um gradiente altitudinal

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