Abstract
SUMMARY Brassica oleracea L. (cabbage) was grown in glasshouse and controlled environments and exposed to simulated rains delivered as sprays at pH 5.6‐2.8. A single rain treatment of pH 3.0 given to 10 d old plants elicited a marked downward curvature in the cotyledons, occurring within the duration of the 30‐min spray. Subsequent to this initial response, the cotyledon surface was extensively damaged. In contrast, the older‘true’leaves showed little or no injury after similar treatments. Estimates of the contact angles between rain droplets and leaf surfaces, and SEM studies of adaxial surfaces, indicated that the contrasting morphology of the epicuticular wax on cotyledons and leaves was a major factor determining the extent of acid rain damage. Simulated rain treatments of pH 3.2 and 2.8, starting at the cotyledons stage, reduced plant growth by 17 and 15% respectively over a 20 d period. However, the same treatments given at later stages in development when the‘true’leaves were predominant, had no significant effect on growth. In the natural environment the occurrence of rate, highly acidic rain events during different stages of plant development may be an important determinant of the impact of rainfall on vegetation. The young, seedling stage of species, such as B. oleracea , in which cotyledons show poor development of surface wax, may be particularly vulnerable.
Abstract from the paper’s OpenAlex record, shown for indexing and research. Copyright remains with the authors or the publisher. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 7
Claim · model-written summary
pH 3.0 rain caused downward cotyledon curvature in 10-day-old cabbage within the 30-minute spray.
- Taxon
- BRASSICA OLERACEA L.t0
- Organ / stage
- cotyledonse0
- Treatment
- pH 3.0e0
- Outcome
- downward curvature in the cotyledonse0
Not reportedComparatorDirection
Verbatim
e0“A single rain treatment of pH 3.0 given to 10 d old plants elicited a marked downward curvature in the cotyledons, occurring within the duration of the 30‐min spray”
t0“BRASSICA OLERACEA L.”
Claim · model-written summary
The cotyledon surface subsequently suffered extensive damage.
- Taxon
- Brassica oleracea L.
Brassica oleraceat0 - Organ / stage
- cotyledone0
- Outcome
- cotyledon surface was extensively damagede0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Subsequent to this initial response, the cotyledon surface was extensively damaged.”
t0“BRASSICA OLERACEA L.”
Claim · model-written summary
Older true leaves showed little or no injury after similar acid rain treatments.
- Taxon
- BRASSICA OLERACEA L.t0
- Organ / stage
- older‘true’leavese0
- Treatment
- similar treatmentse0
- Outcome
- injurye0
- Direction
- little or noe0
Not reportedComparator
Verbatim
e0“the older‘true’leaves showed little or no injury after similar treatments”
t0“BRASSICA OLERACEA L.”
Claim · model-written summary
Epicuticular wax morphology was identified as a major determinant of contrasting acid rain damage.
Verbatim
e0“contrasting morphology of the epicuticular wax on cotyledons and leaves was a major factor determining the extent of acid rain damage”
t0“BRASSICA OLERACEA L.”
Claim · model-written summary
Rain at pH 3.2 from the cotyledon stage reduced cabbage growth by 17% over 20 days.
- Taxon
- BRASSICA OLERACEA L.t0
- Organ / stage
- cotyledons stagee0
- Treatment
- pH 3.2e0
- Outcome
- plant growthe0
- Direction
- reducede0
- Value
- 17e0
Not reportedComparator
Verbatim
e0“Simulated rain treatments of pH 3.2 and 2.8, starting at the cotyledons stage, reduced plant growth by 17 and 15% respectively over a 20 d period.”
t0“BRASSICA OLERACEA L.”
Claim · model-written summary
Rain at pH 2.8 from the cotyledon stage reduced cabbage growth by 15% over 20 days.
- Taxon
- BRASSICA OLERACEA L.t0
- Organ / stage
- cotyledons stagee0
- Treatment
- 2.8e0
- Outcome
- plant growthe0
- Direction
- reducede0
- Value
- 15%e0
Not reportedComparator
Verbatim
e0“Simulated rain treatments of pH 3.2 and 2.8, starting at the cotyledons stage, reduced plant growth by 17 and 15% respectively over a 20 d period.”
t0“BRASSICA OLERACEA L.”
Claim · model-written summary
The same treatments at later stages had no significant growth effect.
- Taxon
- BRASSICA OLERACEA L.t0
- Organ / stage
- true’leavese0
- Treatment
- same treatmentse0
- Outcome
- growthe0
- Direction
- no significant effecte0
Not reportedComparator
Verbatim
e0“same treatments given at later stages in development when the‘true’leaves were predominant, had no significant effect on growth”
t0“BRASSICA OLERACEA L.”
The same questions in other papers
ph · growth · Brassica oleracea (wild cabbage)Positive and negative results
2 papers in the same direction as this paper · 3 in the opposite direction
- positive
- positive
- positive
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.