Abstract
The hypothesis was tested that differences in response to water-deficits between low osmotic potential (LOP) and high osmotic potential (HOP) maize (Zea mays L.) near-isolines were associated with differences in transpiration rate sensitivity to abscisic acid (ABA) and/or sulfate. In a series of four experiments, decreases in transpiration rate (DTR) of whole plants and fully expanded leaves were measured in response to treatments of 1.0 µM ABA and 15 mM MgSO4 singly and in combination following long (2 day) and short (180 min) exposures. There was little evidence that intact plants grown on soil were responsive to the treatments. For hydroponically grown plants subjected to long exposure, there was similarly no response to treatments. Further, the short exposure of hydroponically grown plants to solely ABA or a combination of chemicals resulted in no sensitivity in DTR for either of the near-isolines. On the other hand, when these plants were fed sulfate, the transpiration was stimulated by about 20% for the LOP and 60% for the HOP. Detached leaves proved to be the most sensitive to treatment. Treatment with the two chemicals singly caused essentially equivalent DTR in the two near-isolines. However, treatment with ABA plus sulfate resulted in different DTR between the two near-isolines with values of 65% for the LOP and 16% for the HOP near-isoline. Overall, these results showed that the short exposure treatment of hydroponically grown plants or detached leaves supported the hypothesis of different transpiration rate sensitivities of the near-isolines in response to ABA and sulfate treatments.
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Claims 11
Claim · model-written summary
Soil grown intact plants showed little treatment response.
Zea maysNot reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“There was little evidence that intact plants grown on soil were responsive to the treatments.”
e1“maize (Zea mays L.)”
Claim · model-written summary
Hydroponic plants had no response after long exposure.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“For hydroponically grown plants subjected to long exposure, there was similarly no response to treatments.”
e1“maize (Zea mays L.)”
Claim · model-written summary
Short ABA exposure caused no transpiration sensitivity in either near-isoline.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the short exposure of hydroponically grown plants to solely ABA or a combination of chemicals resulted in no sensitivity in DTR for either of the near-isolines”
e1“maize (Zea mays L.)”
Claim · model-written summary
Short combined chemical exposure caused no transpiration sensitivity in either near-isoline.
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the short exposure of hydroponically grown plants to solely ABA or a combination of chemicals resulted in no sensitivity in DTR for either of the near-isolines”
e1“maize (Zea mays L.)”
Claim · model-written summary
Sulfate stimulated transpiration by about 20% in LOP plants.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when these plants were fed sulfate, the transpiration was stimulated by about 20% for the LOP”
e1“maize (Zea mays L.)”
Claim · model-written summary
Sulfate stimulated transpiration by 60% in HOP plants.
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“when these plants were fed sulfate, the transpiration was stimulated by about 20% for the LOP and 60% for the HOP”
e1“maize (Zea mays L.)”
Claim · model-written summary
Detached leaves were most sensitive to treatment.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Detached leaves proved to be the most sensitive to treatment.”
e1“maize (Zea mays L.)”
Claim · model-written summary
ABA alone caused essentially equivalent transpiration decreases in the two near-isolines.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with the two chemicals singly caused essentially equivalent DTR in the two near-isolines.”
e1“1.0 µM ABA and 15 mM MgSO4 singly”
e2“maize (Zea mays L.)”
Claim · model-written summary
Sulfate alone caused essentially equivalent transpiration decreases in the two near-isolines.
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with the two chemicals singly caused essentially equivalent DTR in the two near-isolines.”
e1“15 mM MgSO4”
e2“maize (Zea mays L.)”
Claim · model-written summary
Combined ABA and sulfate produced 65% DTR in LOP detached leaves.
- Material
- LOPe0
- Treatment
- ABA plus sulfatee0
- Outcome
- DTRe0
- Direction
- differente0
- Value
- 65%e0
- Comparator
- HOP near-isolinee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with ABA plus sulfate resulted in different DTR between the two near-isolines with values of 65% for the LOP and 16% for the HOP near-isoline”
e1“maize (Zea mays L.)”
Claim · model-written summary
Combined ABA and sulfate produced 16% DTR in HOP detached leaves.
- Material
- HOP near-isolinee0
- Treatment
- ABA plus sulfatee0
- Outcome
- DTRe0
- Direction
- differente0
- Value
- 16%e0
- Comparator
- LOPe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“treatment with ABA plus sulfate resulted in different DTR between the two near-isolines with values of 65% for the LOP and 16% for the HOP near-isoline”
e1“maize (Zea mays L.)”
The same questions in other papers
sulfate · physiology: gas exchange · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 1 in the opposite direction
- negative
- positive
(+)-abscisic acid · physiology: gas exchange · Zea mays (maize)Positive and negative results
1 paper in the same direction as this paper · 4 in the opposite direction
- negative
- negative
- negative
2 papers more in this group
See all 6 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.