Abstract
Soil moisture‐dependent, quantitative information on sweetpotato [ Ipomoea batatas L. (Lam)] plant processes is vital for crop management and modeling because of the projected shrinking and uneven distributions of rainfall and irrigation water supply due to climate change. This study was conducted to quantify the growth, physiology, biomass, and storage root yield responses of sweetpotato under four evapotranspiration‐based irrigation treatments (100, 60, 40, and 20% ET) in sunlit growth chambers. Irrigation treatments were imposed from 41 to 97 d after transplanting. Midday leaf water potentials (LWP) and soil moisture contents were measured throughout the experiment. Gas exchange and other physiological measurements were recorded during last 3 wk of the experiment. Plant growth and developmental parameters were measured at 97 d after transplanting. The midday LWP was strongly and linearly correlated with soil moisture content showing the interplay between these two processes. Net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) declined while photosynthetic water‐use efficiency (Pn/Tr) increased with decreasing LWP. Both total chlorophyll content and cell membrane thermostability (CMT) declined linearly with decreasing LWP. Vine length, leaf area, and node number per plant decreased linearly, by 3.2 cm, 96.6 cm 2 , and 0.39 no. plant −1 , respectively, per unit change in ET‐based irrigation. The optimum soil moisture for total plant and storage root dry weights were obtained under the irrigation treatments of 100 and 72% ET, respectively. Biomass partitioning to storage roots declined linearly and leaf and stem portioning increased with increased irrigation. Outcomes of this research will help producers schedule irrigation to maximize yield and researchers to develop sweetpotato crop models.
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Claims 11
Claim · model-written summary
Midday leaf water potential correlated linearly with soil moisture content.
- Taxon
- sweetpotato
_Flower.jpg?width=60)
Ipomoea batatase1 - Treatment
- soil moisture contente0
- Outcome
- midday LWPe0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
_Flower.jpg?width=500)
Verbatim
e0“The midday LWP was strongly and linearly correlated with soil moisture content”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Photosynthesis, stomatal conductance and transpiration declined as leaf water potential decreased.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- decreasing LWPe0
- Outcome
- Net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr)e0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Net photosynthetic rate (Pn), stomatal conductance (Gs), and transpiration rate (Tr) declined while photosynthetic water‐use efficiency (Pn/Tr) increased with decreasing LWP.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Photosynthetic water-use efficiency increased as leaf water potential decreased.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- decreasing LWPe0
- Outcome
- photosynthetic water‐use efficiency (Pn/Tr)e0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthetic water‐use efficiency (Pn/Tr) increased with decreasing LWP.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Total chlorophyll and membrane thermostability declined linearly with decreasing leaf water potential.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- decreasing LWPe0
- Outcome
- total chlorophyll content and cell membrane thermostability (CMT)e0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Both total chlorophyll content and cell membrane thermostability (CMT) declined linearly with decreasing LWP.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Vine length decreased by 3.2 cm per unit change in ET-based irrigation.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- ET‐based irrigatione0
- Outcome
- Vine lengthe0
- Direction
- decreasede0
- Value
- 3.2 cme0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vine length, leaf area, and node number per plant decreased linearly, by 3.2 cm, 96.6 cm 2 , and 0.39 no. plant −1 , respectively, per unit change in ET‐based irrigation.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Leaf area decreased by 96.6 cm 2 per unit change in ET-based irrigation.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- ET‐based irrigatione0
- Outcome
- leaf areae0
- Direction
- decreasede0
- Value
- 96.6 cm 2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vine length, leaf area, and node number per plant decreased linearly, by 3.2 cm, 96.6 cm 2 , and 0.39 no. plant −1 , respectively, per unit change in ET‐based irrigation.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Node number decreased by 0.39 no. plant −1 per unit change in ET-based irrigation.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- ET‐based irrigatione0
- Outcome
- node number per plante0
- Direction
- decreasede0
- Value
- 0.39 no. plant −1e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Vine length, leaf area, and node number per plant decreased linearly, by 3.2 cm, 96.6 cm 2 , and 0.39 no. plant −1 , respectively, per unit change in ET‐based irrigation.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Total plant dry weight was optimal under 100% ET irrigation.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum soil moisture for total plant and storage root dry weights were obtained under the irrigation treatments of 100 and 72% ET, respectively.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Storage root dry weight was optimal under 72% ET irrigation.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- 72% ETe0
- Outcome
- storage root dry weightse0
- Direction
- optimume0
- Value
- 72% ETe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The optimum soil moisture for total plant and storage root dry weights were obtained under the irrigation treatments of 100 and 72% ET, respectively.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Storage-root biomass partitioning declined as irrigation increased.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- increased irrigatione0
- Outcome
- Biomass partitioning to storage rootse0
- Direction
- declinede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biomass partitioning to storage roots declined linearly and leaf and stem portioning increased with increased irrigation.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
Claim · model-written summary
Leaf and stem biomass partitioning increased as irrigation increased.
- Taxon
- sweetpotatoIpomoea batatase1
- Treatment
- increased irrigatione0
- Outcome
- leaf and stem portioninge0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Biomass partitioning to storage roots declined linearly and leaf and stem portioning increased with increased irrigation.”
e1“sweetpotato [ Ipomoea batatas L. (Lam)]”
The same questions in other papers
irrigation · growth · Ipomoea batatas (sweet potato)Positive and negative results
6 papers in the same direction as this paper · 4 in the opposite direction
- positive
- positive
- negative
7 papers more in this group
See all 11 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.