Abstract
Drought is one of the main consequences of climate change that negatively affects plant growth and development, which in turn leads to a reduction in yield. The objective of this study was to investigate the effects of the physiological responses to the drought stress of maize plants (population IP3722), obtained from seeds of different ages (originating from 2012. and 2016) and different previous experience (the seeds formed in 2012. were more exposed to drought than in 2016.). Two populations responded to drought treatment by a significant decrease of shoot fresh and dry weight, this was followed with decrease leaf area and transpiration rate. Drought treatments enabled induction and differentiation of chemical signals of drought (abscisic acid-ABA and xylem pH) and hydraulic signals (leaf water potential), and monitoring of their activity on stomatal conductance. The data showed that hydraulic signals have the same impact on stomatal reactions in the D2012 and D2016 treatments. They also indicated that the chemical signal of ABA works toward stomatal closure, but that the effect depends on whether it originates from the leaf or the root. Leaf-originating ABA had more effect on the closure of D2012 stomata, while root-originating ABA and pH was more active in the D2016.
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Claims 7
Claim · model-written summary
Drought significantly decreased shoot fresh and dry weight in both maize populations.
- Material
- population IP3722e1
- Treatment
- drought treatmente0
- Outcome
- shoot fresh and dry weighte0
- Direction
- decreasee0
Zea maysNot reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Two populations responded to drought treatment by a significant decrease of shoot fresh and dry weight”
e1“maize plants (population IP3722)”
Claim · model-written summary
Drought decreased leaf area and transpiration rate in maize.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“this was followed with decrease leaf area and transpiration rate.”
e1“maize plants (population IP3722)”
e2“drought treatment”
Claim · model-written summary
Drought treatments induced distinct chemical and hydraulic signals in maize.
- Treatment
- Drought treatmentse0
- Outcome
- induction and differentiation of chemical signals of drought (abscisic acid-ABA and xylem pH) and hydraulic signals (leaf water potential)e0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drought treatments enabled induction and differentiation of chemical signals of drought (abscisic acid-ABA and xylem pH) and hydraulic signals (leaf water potential)”
e1“maize plants (population IP3722)”
Claim · model-written summary
Hydraulic signals had the same impact on stomatal reactions in D2012 and D2016 maize treatments.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“hydraulic signals have the same impact on stomatal reactions in the D2012 and D2016 treatments.”
e1“maize plants (population IP3722)”
Claim · model-written summary
ABA chemical signaling promoted stomatal closure, with its effect dependent on leaf or root origin.
- Compound
- ABAe0
- Outcome
- stomatal closuree0
- Qualifier
- depends on whether it originates from the leaf or the roote0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the chemical signal of ABA works toward stomatal closure, but that the effect depends on whether it originates from the leaf or the root.”
e1“maize plants (population IP3722)”
Claim · model-written summary
Leaf-originating ABA had a greater effect on D2012 stomatal closure.
- Treatment
- D2012e0
- Compound
- Leaf-originating ABAe0
- Outcome
- closure of D2012 stomatae0
- Direction
- more effecte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Leaf-originating ABA had more effect on the closure of D2012 stomata”
e1“maize plants (population IP3722)”
Claim · model-written summary
Root-originating ABA and pH were more active in D2016 maize plants.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“root-originating ABA and pH was more active in the D2016.”
e1“maize plants (population IP3722)”
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