Abstract
Southern Nigeria is a major cassava producing area that has been subjected to air pollution from increasing industrial activities and population explosion in the coastal towns and cities. The level of pollution is not expected to change drastically in the immediate future. Investigations were carried out to study the changes in the morphology, survival, growth and yield of TMS 96/1672 cultivar of cassava Manihot esculenta (Crantz) to simulated acid rain. The plants were exposed to simulated acid rain of pH 2.0, 3.0, 4.0, 5.0, 6.0 and 7.0 (control) respectively. Simulated acid rain induced morphological changes including chlorosis, early leaf senescence, necrosis, leaf abscission, leaf folding and death. Plant height, leaf area, fresh weight, dry weight, relative growth rate, chlorophyll content and the harvest index was the highest at pH 7.0 (control) and significantly (p<0.05) decreased with increasing acidity. The results indicates that TMS 96/1672 cultivar of Manihot esculenta exhibited growth stimulation at low acidity of pH 2.0 and it is likely to be retarded in future due to rapid and uncontrolled industrialization.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
Simulated acid rain induced chlorosis, senescence, necrosis, leaf abscission, folding and death.
- Taxon
- Cassava Manihot esculenta
Manihot esculentat0 - Treatment
- Simulated acid raine0
- Outcome
- chlorosis, early leaf senescence, necrosise0
- Qualifier
- leaf abscission, leaf folding and deathe0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simulated acid rain induced morphological changes including chlorosis, early leaf senescence, necrosis, leaf abscission, leaf folding and death.”
t0“Cassava Manihot esculenta (Crantz)”
Claim · model-written summary
Plant height and leaf area were highest at pH 7 and decreased significantly as acidity increased.
- Taxon
- Cassava Manihot esculentaManihot esculentat0
- Treatment
- increasing aciditye0
- Outcome
- Plant height, leaf areae0
- Direction
- decreasede0
- Value
- p<0.05e0
- Comparator
- pH 7.0 (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, leaf area, fresh weight, dry weight, relative growth rate, chlorophyll content and the harvest index was the highest at pH 7.0 (control) and significantly (p<0.05) decreased with increasing acidity.”
t0“Cassava Manihot esculenta (Crantz)”
Claim · model-written summary
Fresh and dry weight and relative growth rate decreased significantly with increasing acidity.
- Taxon
- Cassava Manihot esculentaManihot esculentat0
- Treatment
- increasing aciditye0
- Outcome
- fresh weight, dry weight, relative growth ratee0
- Direction
- decreasede0
- Comparator
- pH 7.0 (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, leaf area, fresh weight, dry weight, relative growth rate, chlorophyll content and the harvest index was the highest at pH 7.0 (control) and significantly (p<0.05) decreased with increasing acidity.”
t0“Cassava Manihot esculenta (Crantz)”
Claim · model-written summary
Chlorophyll content decreased significantly with increasing acidity.
- Taxon
- Cassava Manihot esculentaManihot esculentat0
- Treatment
- increasing aciditye0
- Outcome
- chlorophyll contente0
- Direction
- decreasede0
- Comparator
- pH 7.0 (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, leaf area, fresh weight, dry weight, relative growth rate, chlorophyll content and the harvest index was the highest at pH 7.0 (control) and significantly (p<0.05) decreased with increasing acidity.”
t0“Cassava Manihot esculenta (Crantz)”
Claim · model-written summary
Harvest index decreased significantly with increasing acidity.
- Taxon
- Cassava Manihot esculentaManihot esculentat0
- Treatment
- increasing aciditye0
- Outcome
- harvest indexe0
- Direction
- decreasede0
- Comparator
- pH 7.0 (control)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Plant height, leaf area, fresh weight, dry weight, relative growth rate, chlorophyll content and the harvest index was the highest at pH 7.0 (control) and significantly (p<0.05) decreased with increasing acidity.”
t0“Cassava Manihot esculenta (Crantz)”
Claim · model-written summary
The authors report growth stimulation at pH 2.0, despite the reported decline with acidity.
- Taxon
- Manihot esculentaManihot esculentae0
- Material
- TMS 96/1672e0
- Treatment
- low acidity of pH 2.0e0
- Outcome
- growth stimulatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“TMS 96/1672 cultivar of Manihot esculenta exhibited growth stimulation at low acidity of pH 2.0”
The same questions in other papers
ph · growth · Manihot esculenta (cassava)Positive and negative results
1 paper in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →ph · physiology: pigments · Manihot esculenta (cassava)Results agree
1 paper in the same direction as this paper
- negative
rainfall · physiology: pigments · Manihot esculenta (cassava)Results agree
2 papers in the same direction as this paper
- negative
- negative
ph · yield · Manihot esculenta (cassava)Results agree
3 papers in the same direction as this paper
- negative
- negative
- no effect
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.