Abstract
In previous experiments, soil fertilization with triple super phosphate (TSP) as compared to diammonium phosphate (DAP) was found to induce plant drought resilience. The previous experiments were done, however, on pH 6.6 soil and it was unknown whether TSP-induced drought resilience would exist at lower soil pH. Since the permeability of aquaporins has been shown to decrease with decreased pH, hypothetically lower soil pH would enhance the TSP-induced drought resilience. To test the hypothesis of root hydraulic conductance sensitivity to soil pH, treatments of soil acidification and gypsum application with TSP soil fertilization were undertaken. Plant drought resilience was determined on drying soil by measuring the soil water content at which the decrease in transpiration rate was initiated. It was found that watering the soil with an acetic acid solution of pH 5.4 resulted in a loss of plant drought resilience. In a separate experiment root hydraulic conductance was determined by over-pressurizing the rhizosphere and measuring plant sap exudation. Root hydraulic conductance of five maize genotypes all showed low root hydraulic conductance with TSP for 6.6 pH soil treatment as compared to 5.4 pH. On the other hand, gypsum application to TSP-treated soils resulted in decreased root hydraulic conductance. The application of gypsum to DAP-treated soil resulted in increased root hydraulic conductance, but this did not change plant drought resilience.
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Claims 5
Claim · model-written summary
Acetic acid watering at pH 5.4 caused loss of plant drought resilience.
- Treatment
- watering the soil with an acetic acid solution of pH 5.4e0
- Outcome
- plant drought resiliencee0
- Direction
- losse0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“watering the soil with an acetic acid solution of pH 5.4 resulted in a loss of plant drought resilience.”
t0“maize”
Claim · model-written summary
With TSP, five maize genotypes showed lower root hydraulic conductance at soil pH 6.6 than at pH 5.4.
- Treatment
- TSP for 6.6 pH soil treatmente0
- Outcome
- Root hydraulic conductancee0
- Direction
- lowe0
- Comparator
- 5.4 pHe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Root hydraulic conductance of five maize genotypes all showed low root hydraulic conductance with TSP for 6.6 pH soil treatment as compared to 5.4 pH.”
t0“maize”
Claim · model-written summary
Gypsum reduced root hydraulic conductance in TSP-treated soil.
- Treatment
- gypsum application to TSP-treated soilse0
- Outcome
- root hydraulic conductancee0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“gypsum application to TSP-treated soils resulted in decreased root hydraulic conductance.”
t0“maize”
Claim · model-written summary
Gypsum increased root hydraulic conductance in DAP-treated soil.
- Treatment
- application of gypsum to DAP-treated soile0
- Outcome
- root hydraulic conductancee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of gypsum to DAP-treated soil resulted in increased root hydraulic conductance”
t0“maize”
Claim · model-written summary
Gypsum in DAP-treated soil did not change plant drought resilience.
- Treatment
- application of gypsum to DAP-treated soile0
- Outcome
- plant drought resiliencee0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The application of gypsum to DAP-treated soil resulted in increased root hydraulic conductance, but this did not change plant drought resilience.”
t0“maize”
The same questions in other papers
irrigation · tolerance: abiotic · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- positive
- 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.