Abstract
Histological studies were carried out to investigate the impact of some pathogenic organisms on infected cassava root after different periods of incubation. Cassava roots inoculated with Aspergillus niger, Rhizopus stolonifer, Aspergillus flavus, and Trichoderma viride showed progressive depletion of the starch grains in the cells and tissue maceration of the cassava root as the period of incubation increased. Cassava root inoculated with A. flavus showed tissue necrosis and slight fragmentation of the starch grains whereas, cassava tissues infected with A. niger showed tissue necrosis and general maceration of the starch grains within the tissue thereby creating empty spaces within the cells with no clear arrangement of the starch grains. Inoculation of the cassava tissues with R. stolonifer resulted in rapid loss of the starch grains and erosion of surrounding cell boundaries. Cassava tissue colonized by T. viride showed tissue necrosis and maceration of the starch grains. Healthy (uninoculated) cassava root tissue showed intact cells packed with large starch grains suggesting that in the host-parasite relationship, the pathogens established themselves inter and intracellularly in the parenchymatous cells of the cortex of the cassava root clearing them of starch grains, and resulting to poor yield and nutritional value of cassava and also economic loss.
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Claims 5
Claim · model-written summary
A. flavus inoculation produced tissue necrosis and slight starch grain fragmentation in cassava roots.
- Taxon
- Cassava
Manihot esculentae0 - Treatment
- inoculated with A. flavuse0
- Interactor
- A. flavus
Aspergillus flavuse0pathogen - Outcome
- tissue necrosis and slight fragmentation of the starch grainse0
- Direction
- showede0
- Comparator
- uninoculatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava root inoculated with A. flavus showed tissue necrosis and slight fragmentation of the starch grains”
e1“Healthy (uninoculated) cassava root tissue showed intact cells packed with large starch grains”
Claim · model-written summary
A. niger infection produced necrosis and extensive starch grain maceration.
- Taxon
- cassavaManihot esculentae0
- Treatment
- infected with A. nigere0
- Interactor
- A. niger
Aspergillus nigere0pathogen - Outcome
- tissue necrosis and general maceration of the starch grainse0
- Direction
- showede0
- Comparator
- uninoculatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“cassava tissues infected with A. niger showed tissue necrosis and general maceration of the starch grains within the tissue thereby creating empty spaces within the cells”
e1“Healthy (uninoculated) cassava root tissue showed intact cells packed with large starch grains”
Claim · model-written summary
R. stolonifer inoculation caused rapid starch grain loss and erosion of cell boundaries.
- Taxon
- cassavaManihot esculentae0
- Treatment
- Inoculation of the cassava tissues with R. stolonifere0
- Interactor
- R. stolonifer
Rhizopus stolonifere0pathogen - Outcome
- loss of the starch grains and erosion of surrounding cell boundariese0
- Direction
- rapid losse0
- Comparator
- uninoculatede1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inoculation of the cassava tissues with R. stolonifer resulted in rapid loss of the starch grains and erosion of surrounding cell boundaries”
e1“Healthy (uninoculated) cassava root tissue showed intact cells packed with large starch grains”
Claim · model-written summary
T. viride colonization was associated with tissue necrosis and starch grain maceration.
- Taxon
- CassavaManihot esculentae0
- Interactor
- T. viride
Trichoderma viridee0pathogen - Outcome
- tissue necrosis and maceration of the starch grainse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Cassava tissue colonized by T. viride showed tissue necrosis and maceration of the starch grains”
Claim · model-written summary
Healthy uninoculated cassava roots had intact cells packed with large starch grains.
- Taxon
- cassavaManihot esculentae0
- Outcome
- intact cells packed with large starch grainse0
- Qualifier
- uninoculatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Healthy (uninoculated) cassava root tissue showed intact cells packed with large starch grains”
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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.