Abstract
Sweet potato (Ipomoea batatas L.) is one of the major staple crops of the world and feeds millions of people in developing countries. Although sweet potato (Ipomoea batatas (L.) is adapted to various climatic conditions the crop is sensitive to water deficit stress. This emphasises the importance of screening techniques for drought resistant genotypes and better water management practices. The response of four orange fleshed sweet potato varieties Resisto,W-119, Sunset Purple and Isondlo, to three irrigation treatments was evaluated. The results confirm that although sweet potato can survive severe moisture stress conditions, marketable yield is adversely affected. The variety W-119 outperformed the other varieties during severe moisture stress, with Resisto identified as very sensitive to moisture stress. Variety Isondlo has the ability to use water very efficiently at all irrigation levels showing promising results regarding yield and water usage effiency (WUE). Significant differences were observed in shoot development, leaf area index, marketable yield and stomatal conductance between the varieties and the treatments. Severe water stress resulted in closure of stoma and exhibited dramatic decline in photosynthetic/transpiration rate. Results demonstrate a large set of parallel changes in the morphological, physiological and biochemical processes when the varieties were exposed to drought stress which may effect growth. The results also illustrate that the measurement of stomatal conductance, CO2 assimilation rate and WUE are suitable methods to screen varieties for the adaptability to drought stress.
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Claims 8
Claim · model-written summary
Severe moisture stress adversely affected marketable sweet potato yield.
- Taxon
- sweet potato
_Flower.jpg?width=60)
Ipomoea batatase0 - Treatment
- severe moisture stress conditionse0
- Outcome
- marketable yielde0
- Direction
- adversely affectede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“although sweet potato can survive severe moisture stress conditions, marketable yield is adversely affected”
Claim · model-written summary
W-119 outperformed the other sweet potato varieties under severe moisture stress.
- Material
- W-119e0
- Treatment
- severe moisture stresse0
- Outcome
- outperformed the other varietiese0
- Comparator
- the other varietiese0
Not reportedTaxon
Verbatim
e0“The variety W-119 outperformed the other varieties during severe moisture stress”
Claim · model-written summary
Resisto was very sensitive to moisture stress.
- Taxon
- sweetpotatoIpomoea batatast0
- Material
- Resistoe0
- Treatment
- moisture stresse0
- Outcome
- very sensitive to moisture stresse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Resisto identified as very sensitive to moisture stress”
t0“sweetpotato”
Claim · model-written summary
Isondlo used water efficiently across irrigation levels, with promising yield and water use efficiency.
- Taxon
- sweetpotatoIpomoea batatast0
- Material
- Isondloe0
- Outcome
- use water very efficientlye0
- Qualifier
- at all irrigation levelse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Variety Isondlo has the ability to use water very efficiently at all irrigation levels showing promising results regarding yield and water usage effiency (WUE)”
t0“sweetpotato”
Claim · model-written summary
Shoot development, leaf area index, marketable yield and stomatal conductance differed significantly among varieties and treatments.
- Taxon
- sweetpotatoIpomoea batatast0
- Outcome
- shoot development, leaf area index, marketable yield and stomatal conductancee0
- Comparator
- the varieties and the treatmentse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were observed in shoot development, leaf area index, marketable yield and stomatal conductance between the varieties and the treatments”
t0“sweetpotato”
Claim · model-written summary
Severe water stress closed stomata.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- Severe water stresse0
- Outcome
- closure of stomae0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe water stress resulted in closure of stoma”
t0“sweetpotato”
Claim · model-written summary
Severe water stress caused a dramatic decline in photosynthetic and transpiration rate.
- Taxon
- sweetpotatoIpomoea batatast0
- Treatment
- Severe water stresse0
- Outcome
- photosynthetic/transpiration ratee0
- Direction
- declinee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Severe water stress resulted in closure of stoma and exhibited dramatic decline in photosynthetic/transpiration rate”
t0“sweetpotato”
Claim · model-written summary
Stomatal conductance, CO2 assimilation rate and WUE were suitable screening measures for drought adaptability.
- Taxon
- sweetpotatoIpomoea batatast0
- Outcome
- suitable methods to screen varieties for the adaptability to drought stresse0
- Qualifier
- stomatal conductance, CO2 assimilation rate and WUEe0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the measurement of stomatal conductance, CO2 assimilation rate and WUE are suitable methods to screen varieties for the adaptability to drought stress”
t0“sweetpotato”
The same questions in other papers
drought · quality: postharvest · Ipomoea batatas (sweet potato)Positive and negative results
1 in the opposite direction
- positive
drought · physiology: photosynthesis · Ipomoea batatas (sweet potato)Results agree
4 papers in the same direction as this paper
- negative
- negative
- negative
1 paper more in this group
See all 5 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.