Abstract
This study evaluated the effect of water deficit on the physiological response and yield of three Andean potato cultivars. Leaf water potential (Ψw), soil matric potential (SMP), photosynthesis (A), stomatal conductance (gs), transpiration (E), intrinsic water use efficiency (WUEi), leaf temperature (LT), chlorophyll fluorescence parameters, chlorophyll (Chl), carotenoids (Car), electrolyte leakage (EL), growth and yield (Y). Parameters were determined in well-watered (WW) and drought-stressed (DS) plants. The three DS cultivars showed a decrease in leaf from the first day of treatment and reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar. The values of A, gsand E in the DS cultivars decreased from the first DAT. The LT reached the highest values when gs showed the lowest values for the three DS cultivars. WUEi was higher in Es under DS plants but lower in DC under DS. The PSII photochemical efficiency (Fv/Fm) showed values greater than 0.8 for all DS cultivars under DS, suggesting the absence of non-stomatal limitations for A. The Chl content increased in the Es cultivar under DS from 5 to 7 DAT compared to WW plants. Carotenoids (Ca) contents, the Car/Chl ratio, and EL increased in the three DS cultivars. There were no differences in yield and growth parameters between WW and DS cultivars. These results suggest that the three cultivars developed mechanisms to overcome the stress. One of these mechanisms could be the early synthesis of Car, which may maintain photosystem II function under water stress.
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Claims 13
Claim · model-written summary
Leaf water potential of drought-stressed potato cultivars decreased from the first day of treatment.
- Taxon
- Andean potato (Solanum tuberosum L.)
Solanum tuberosumt0 - Treatment
- drought-stressed (DS)e3
- Outcome
- Leaf water potential (Ψw)e2
- Direction
- decreasee1
- Comparator
- well-watered (WW)e3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e1“The three DS cultivars showed a decrease in leaf from the first day of treatment”
e2“Leaf water potential (Ψw)”
e3“Parameters were determined in well-watered (WW) and drought-stressed (DS) plants”
Claim · model-written summary
Diacol Capiro leaf water potential reached about -2.00 MPa at 4 days after treatment.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Material
- Diacol Capiro (DC)e4
- Outcome
- Leaf water potential (Ψw)e2
- Value
- -2.00 MPae4
- Qualifier
- 4 days after treatment (DAT)e4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e4“reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar”
e2“Leaf water potential (Ψw)”
Claim · model-written summary
Pastusa Suprema leaf water potential reached about -2.00 MPa at 5 days after treatment.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Material
- Pastusa Suprema (PS)e4
- Outcome
- Leaf water potential (Ψw)e2
- Value
- -2.00 MPae4
- Qualifier
- 5 DATe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e4“reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar”
e2“Leaf water potential (Ψw)”
Claim · model-written summary
Esmeralda leaf water potential reached about -2.00 MPa at 6 days after treatment.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Material
- Esmeralda (Es)e4
- Outcome
- Leaf water potential (Ψw)e2
- Value
- -2.00 MPae4
- Qualifier
- 6 DATe4
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e4“reached values close to -2.00 MPa 4 days after treatment (DAT) for the Diacol Capiro (DC) cultivar, 5 DAT for the Pastusa Suprema (PS) cultivar and 6 DAT for the Esmeralda (Es) cultivar”
e2“Leaf water potential (Ψw)”
Claim · model-written summary
Drought-stressed cultivars showed decreased A, gs and E from the first day after treatment.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- DSe5
- Outcome
- A, gsand Ee5
- Direction
- decreasede5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e5“The values of A, gsand E in the DS cultivars decreased from the first DAT”
Claim · model-written summary
Leaf temperature was highest when stomatal conductance was lowest in the three drought-stressed cultivars.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Material
- three DS cultivarse6
- Outcome
- LTe6
- Direction
- higheste6
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e6“The LT reached the highest values when gs showed the lowest values for the three DS cultivars”
Claim · model-written summary
WUEi was higher in Esmeralda under drought.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Material
- Ese7
- Treatment
- under DS plantse7
- Outcome
- WUEie7
- Direction
- highere7
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e7“WUEi was higher in Es under DS plants”
Claim · model-written summary
WUEi was lower in Diacol Capiro (DC) under drought.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Material
- DCe1
- Treatment
- under DSe1
- Outcome
- WUEie1
- Direction
- lowere1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e1“WUEi was higher in Es under DS plants but lower in DC under DS”
Claim · model-written summary
PSII photochemical efficiency (Fv/Fm) stayed above 0.8 in all drought-stressed cultivars, suggesting no non-stomatal limitation of photosynthesis.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Outcome
- PSII photochemical efficiency (Fv/Fm)e1
- Value
- greater than 0.8e1
- Qualifier
- suggesting the absence of non-stomatal limitations for Ae2
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e1“The PSII photochemical efficiency (Fv/Fm) showed values greater than 0.8 for all DS cultivars”
e2“suggesting the absence of non-stomatal limitations for A”
Claim · model-written summary
Chlorophyll content of Esmeralda increased under drought from 5 to 7 days after treatment compared with well-watered plants.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Material
- Es cultivare1
- Treatment
- under DSe1
- Outcome
- Chl contente1
- Direction
- increasede1
- Qualifier
- from 5 to 7 DATe1
- Comparator
- WW plantse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e1“The Chl content increased in the Es cultivar under DS from 5 to 7 DAT compared to WW plants”
Claim · model-written summary
Carotenoid content, Car/Chl ratio and electrolyte leakage increased in the three drought-stressed cultivars.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- DSe1
- Outcome
- Carotenoids (Ca) contents, the Car/Chl ratio, and ELe1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e1“Carotenoids (Ca) contents, the Car/Chl ratio, and EL increased in the three DS cultivars”
Claim · model-written summary
Yield and growth parameters did not differ between well-watered and drought-stressed cultivars.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Treatment
- DSe1
- Outcome
- yield and growth parameterse1
- Direction
- no_changeinferrede1
- Comparator
- WWe1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e1“There were no differences in yield and growth parameters between WW and DS cultivars”
Claim · model-written summary
Early synthesis of carotenoids may maintain photosystem II function under water stress.
- Taxon
- Andean potato (Solanum tuberosum L.)Solanum tuberosumt0
- Compound
- Care1
- Outcome
- photosystem II functione1
- Qualifier
- under water stresse1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“three Andean potato (Solanum tuberosum L.) cultivars”
e1“One of these mechanisms could be the early synthesis of Car, which may maintain photosystem II function under water stress”
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See all 47 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.