Abstract
The use of arbuscular mycorrhizal fungal (AMF) inoculation in sustainable agriculture is now widespread worldwide. Although the use of inoculants consisting of native AMF is highly recommended as an alternative to commercial ones, there is no strategy to allow the selection of efficient fungal species from natural communities. The objective of this study was (i) to select efficient native AMF species(ii) evaluatetheir impact on nematode and water stresses, and (iii) evaluate their impact on cassava yield, an important food security crop in tropical and subtropical regions. Firstly, native AMF communities associated with cassava rhizospheres in fields were collected from different areas and 7 AMF species were selected, based upon their ubiquity and abundance. Using these criteria, two morphotypes (LBVM01 and LBVM02) out of the seven AMF species selected were persistently dominant when cassava was used as a trap plant. LBVM01 and LBVM02 were identified as Acaulospora colombiana (most abundant) and Ambispora appendicula, respectively, after phylogenetic analyses of LSU-ITS-SSU PCR amplified products. Secondly, the potential of these two native AMF species to promote growth and enhance tolerance to root-knot nematode and water stresses of cassava (Yavo variety) was evaluated using single and dual inoculation in greenhouse conditions. Of the two AMF species, it was shown that A. colombiana significantly improved the growth of the cassava and enhanced tolerance to water stress. However, both A. colombiana and A. appendicula conferred bioprotective effects to cassava plants against the nematode Meloidogyne sp.,ranging from resistance (suppression or reduction of the nematode reproduction) or tolerance (low or no suppression in cassava growth). Thirdly, the potential of these selected native AMF to improve cassava growth and yield was evaluated under field conditions, compared to a commercial inoculant. In these conditions, the A. colombiana single inoculation and the dual inoculation significantly improved cassava yield compared to the commercial inoculants. This is the first report on native AMF species exhibiting multiple benefits for cassava crop productivity, namely improved plant growth and yield, water stress tolerance and nematode resistance.
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Claims 9
Claim · model-written summary
Morphotype LBVM01 was identified as Acaulospora colombiana, the most abundant, by phylogenetic analysis.
- Taxon
- Acaulospora colombianaAcaulospora colombianae0
- Material
- LBVM01e0
- Outcome
- Acaulospora colombiana (most abundant)e0
Verbatim
e0“LBVM01 and LBVM02 were identified as Acaulospora colombiana (most abundant) and Ambispora appendicula, respectively”
Claim · model-written summary
Morphotype LBVM02 was identified as Ambispora appendicula by phylogenetic analysis.
- Taxon
- Ambispora appendiculaAmbispora appendiculae0
- Material
- LBVM02e0
- Outcome
- Ambispora appendiculae0
Verbatim
e0“LBVM01 and LBVM02 were identified as Acaulospora colombiana (most abundant) and Ambispora appendicula, respectively”
Claim · model-written summary
Two of the seven selected AMF morphotypes, LBVM01 and LBVM02, were persistently dominant when cassava was used as a trap plant.
- Taxon
- cassava
Manihot esculentae0 - Material
- LBVM01 and LBVM02e0
- Outcome
- persistently dominante0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“two morphotypes (LBVM01 and LBVM02) out of the seven AMF species selected were persistently dominant when cassava was used as a trap plant”
Claim · model-written summary
A. colombiana significantly improved the growth of cassava.
- Taxon
- cassavaManihot esculentae0
- Treatment
- A. colombianae0
- Interactor
- A. colombianaAcaulospora colombianae0symbiont
- Outcome
- growth of the cassavae0
- Direction
- improvede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. colombiana significantly improved the growth of the cassava and enhanced tolerance to water stress”
Claim · model-written summary
A. colombiana enhanced cassava tolerance to water stress.
- Taxon
- cassavaManihot esculentae0
- Treatment
- A. colombianae0
- Interactor
- A. colombianaAcaulospora colombianae0symbiont
- Outcome
- tolerance to water stresse0
- Direction
- enhancede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“A. colombiana significantly improved the growth of the cassava and enhanced tolerance to water stress”
Claim · model-written summary
A. colombiana conferred bioprotective effects to cassava against the nematode Meloidogyne sp.
- Taxon
- cassavaManihot esculentae0
- Treatment
- A. colombianae0
- Interactor
- Meloidogyne sp.
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Meloidogynee0pest - Second interactor
- A. colombianaAcaulospora colombianae0symbiont
- Outcome
- bioprotective effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_penetrates_a_tomato_root_-_USDA-ARS.jpg?width=500)
Verbatim
e0“both A. colombiana and A. appendicula conferred bioprotective effects to cassava plants against the nematode Meloidogyne sp.”
Claim · model-written summary
A. appendicula conferred bioprotective effects to cassava against the nematode Meloidogyne sp.
- Taxon
- cassavaManihot esculentae0
- Treatment
- A. appendiculae0
- Interactor
- Meloidogyne sp.Meloidogynee0pest
- Second interactor
- A. appendiculaAmbispora appendiculae0symbiont
- Outcome
- bioprotective effectse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both A. colombiana and A. appendicula conferred bioprotective effects to cassava plants against the nematode Meloidogyne sp.”
Claim · model-written summary
Under field conditions, single inoculation with A. colombiana significantly improved cassava yield compared with commercial inoculants.
- Taxon
- cassavaManihot esculentae0
- Treatment
- A. colombiana single inoculatione0
- Interactor
- A. colombianaAcaulospora colombianae0symbiont
- Outcome
- cassava yielde0
- Direction
- improvede0
- Comparator
- commercial inoculantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the A. colombiana single inoculation and the dual inoculation significantly improved cassava yield compared to the commercial inoculants”
Claim · model-written summary
Under field conditions, dual inoculation with the two native AMF significantly improved cassava yield compared with commercial inoculants.
- Taxon
- cassavaManihot esculentae0
- Treatment
- the dual inoculatione0
- Outcome
- cassava yielde0
- Direction
- improvede0
- Comparator
- commercial inoculantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the A. colombiana single inoculation and the dual inoculation significantly improved cassava yield compared to the commercial inoculants”
The same questions in other papers
inoculation · yield · Manihot esculenta (cassava)Positive and negative results
16 papers in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
15 papers more in this group
See all 19 papers →Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.