Abstract
The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress, although storage root yield and quality may be compromised. Root yield is particularly vulnerable to water restriction during the time of plant establishment, as any lignification of developing roots may impair their potential for the lateral thickening associated with carbohydrate storage. Sweetpotato cultivars vary in both their sensitivity and response to drought. In this field study, the growth of sweetpotato clones under prolonged natural drought conditions was compared with growth in a well watered environment. Throughout the growing season, some clones under drought stress underwent an atypical extended period of profuse flowering. While the canopies of clones grown under watered conditions exhibited complete ground coverage by season‟s end, canopies of drought-affected plants showed a range of clone-specific responses. Insects caused a greater degree of root damage at the water-stressed site, as soil cracking increased insect access to the roots. At harvest, three distinct drought yield responses were demonstrated: lowered root yield, unmodified yield, and increased root yield (P<0.001). The cultivar „Toka Toka Gold‟ demonstrated a 77% increase in marketable root yield under conditions of water stress, compared with that of the well watered site. The influence of drought on yield components differed with specific clones, both in the number of storage roots formed (P<0.001) and average root weight (P<0.001). Storage root quality was also affected, with the roots of some clones developing fluting along their main axes, while others were unaffected.
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Claims 11
Claim · model-written summary
Some sweetpotato clones under drought stress underwent an atypical extended period of profuse flowering.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatase0 - Treatment
- drought stresse1
- Outcome
- profuse floweringe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e1“some clones under drought stress underwent an atypical extended period of profuse flowering”
Claim · model-written summary
Canopies of drought-affected sweetpotato plants showed a range of clone-specific responses.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- droughte3
- Outcome
- canopiese3
- Qualifier
- clone-specific responsese3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e3“canopies of drought-affected plants showed a range of clone-specific responses”
Claim · model-written summary
Under prolonged natural drought, some sweetpotato clones had lowered root yield compared with a well watered environment.
- Taxon
- sweetpotatoIpomoea batatase2
- Treatment
- prolonged natural drought conditionse2
- Outcome
- root yielde4
- Direction
- lowerede4
- Comparator
- well watered environmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the growth of sweetpotato clones under prolonged natural drought conditions was compared with growth in a well watered environment”
e4“three distinct drought yield responses were demonstrated: lowered root yield, unmodified yield, and increased root yield (P<0.001)”
Claim · model-written summary
Under prolonged natural drought, some sweetpotato clones showed unmodified yield compared with a well watered environment.
- Taxon
- sweetpotatoIpomoea batatase2
- Treatment
- prolonged natural drought conditionse2
- Outcome
- yielde4
- Direction
- unmodifiede4
- Comparator
- well watered environmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the growth of sweetpotato clones under prolonged natural drought conditions was compared with growth in a well watered environment”
e4“three distinct drought yield responses were demonstrated: lowered root yield, unmodified yield, and increased root yield (P<0.001)”
Claim · model-written summary
Under prolonged natural drought, some sweetpotato clones had increased root yield compared with a well watered environment (P<0.001).
- Taxon
- sweetpotatoIpomoea batatase2
- Treatment
- prolonged natural drought conditionse2
- Outcome
- root yielde4
- Direction
- increasede4
- Comparator
- well watered environmente2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e2“the growth of sweetpotato clones under prolonged natural drought conditions was compared with growth in a well watered environment”
e4“three distinct drought yield responses were demonstrated: lowered root yield, unmodified yield, and increased root yield (P<0.001)”
Claim · model-written summary
The cultivar Toka Toka Gold had a 77% increase in marketable root yield under water stress compared with the well watered site.
- Taxon
- sweetpotatoIpomoea batatase0
- Material
- Toka Toka Golde7
- Treatment
- water stresse7
- Outcome
- marketable root yielde7
- Direction
- increasee7
- Value
- 77%e7
- Comparator
- well watered sitee7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e7“The cultivar „Toka Toka Gold‟ demonstrated a 77% increase in marketable root yield under conditions of water stress, compared with that of the well watered site”
Claim · model-written summary
Drought influence on the number of storage roots formed differed with specific sweetpotato clones.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- droughte7
- Outcome
- number of storage roots formede7
- Qualifier
- differed with specific clonese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e7“The influence of drought on yield components differed with specific clones, both in the number of storage roots formed (P<0.001) and average root weight (P<0.001)”
Claim · model-written summary
Drought influence on average storage root weight differed with specific sweetpotato clones.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- droughte7
- Outcome
- average root weighte7
- Qualifier
- differed with specific clonese7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e7“The influence of drought on yield components differed with specific clones, both in the number of storage roots formed (P<0.001) and average root weight (P<0.001)”
Claim · model-written summary
Storage root quality was affected by drought in some sweetpotato clones, which developed fluting along the main axes; others were unaffected.
- Taxon
- sweetpotatoIpomoea batatase0
- Outcome
- storage root qualitye6
- Qualifier
- fluting along their main axese6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e6“Storage root quality was also affected, with the roots of some clones developing fluting along their main axes, while others were unaffected”
Claim · model-written summary
Insects caused greater root damage to sweetpotato at the water-stressed site.
- Taxon
- sweetpotatoIpomoea batatase0
- Outcome
- root damagee5
- Direction
- greatere5
- Setting
- water-stressed sitee5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e5“Insects caused a greater degree of root damage at the water-stressed site”
Claim · model-written summary
Soil cracking is proposed to increase insect access to sweetpotato roots.
- Taxon
- sweetpotatoIpomoea batatase0
- Treatment
- soil crackinge6
- Outcome
- insect access to the rootse6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The sweetpotato (Ipomoea batatas) plant is tolerant to long periods of drought stress”
e6“as soil cracking increased insect access to the roots”
The same questions in other papers
drought · quality: postharvest · Ipomoea batatas (sweet potato)Positive and negative results
1 in the opposite direction
- negative
drought · yield · Ipomoea batatas (sweet potato)Positive and negative results
3 papers in the same direction as this paper · 9 in the opposite direction
- negative
- negative
- negative
9 papers more in this group
See all 13 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.