Abstract
Gametophores of the moss Tortula ruralis were treated with sulfuric acid solutions at pH values of 1.0 to 6.0. The concentration of chlorophylls a+b decreased between pH6 and pH3 followed by a more rapid decline between pH3 and pH1. Chlorophyll a was more sensitive to acid than chlorophyll b. Oxygen production based on chlorophyll was relatively unaffected between pH6 and pH2, whereas photosynthesis based on dry weight decreased uniformly in relation to decrease in pH. Respiration was insensitive to pH values as low as pH2. Simulated acid rain appeared to effect a reduction in photosynthesis largely through acid hydrolysis of chlorophyll a.
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Claims 6
Claim · model-written summary
Chlorophyll a+b concentration fell from pH 6 to pH 3 and declined more rapidly from pH 3 to pH 1.
- Taxon
- Tortula ruralis
Syntrichia ruralise1 - Treatment
- sulfuric acid solutionse1
- Outcome
- concentration of chlorophylls a+be0
- Direction
- decreasede0
- Qualifier
- between pH6 and pH3 followed by a more rapid decline between pH3 and pH1e0
- Comparator
- pH6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The concentration of chlorophylls a+b decreased between pH6 and pH3 followed by a more rapid decline between pH3 and pH1.”
e1“Gametophores of the moss Tortula ruralis were treated with sulfuric acid solutions at pH values of 1.0 to 6.0.”
Claim · model-written summary
Chlorophyll a was more sensitive to acid than chlorophyll b.
- Taxon
- Tortula ruralisSyntrichia ruralise1
- Outcome
- Chlorophyll ae0
- Direction
- more sensitivee0
- Comparator
- chlorophyll be0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Chlorophyll a was more sensitive to acid than chlorophyll b.”
e1“Gametophores of the moss Tortula ruralis were treated with sulfuric acid solutions”
Claim · model-written summary
Oxygen production per chlorophyll was relatively unchanged between pH 6 and pH 2.
- Taxon
- Tortula ruralisSyntrichia ruralise1
- Treatment
- sulfuric acid solutionse1
- Outcome
- Oxygen production based on chlorophylle0
- Direction
- relatively unaffectede0
- Qualifier
- between pH6 and pH2e0
- Comparator
- pH6e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Oxygen production based on chlorophyll was relatively unaffected between pH6 and pH2”
e1“Gametophores of the moss Tortula ruralis were treated with sulfuric acid solutions”
Claim · model-written summary
Photosynthesis per dry weight declined uniformly as pH fell.
- Taxon
- Tortula ruralisSyntrichia ruralise1
- Treatment
- sulfuric acid solutionse1
- Outcome
- photosynthesis based on dry weighte0
- Direction
- decreasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“photosynthesis based on dry weight decreased uniformly in relation to decrease in pH”
e1“Gametophores of the moss Tortula ruralis were treated with sulfuric acid solutions”
Claim · model-written summary
Respiration was insensitive to pH down to pH 2.
- Taxon
- Tortula ruralisSyntrichia ruralise1
- Treatment
- sulfuric acid solutionse1
- Outcome
- Respiratione0
- Direction
- insensitivee0
- Qualifier
- pH values as low as pH2e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Respiration was insensitive to pH values as low as pH2.”
e1“Gametophores of the moss Tortula ruralis were treated with sulfuric acid solutions”
Claim · model-written summary
The authors attribute reduced photosynthesis under simulated acid rain largely to acid hydrolysis of chlorophyll a.
- Taxon
- Tortula ruralisSyntrichia ruralise1
- Treatment
- Simulated acid raine0
- Outcome
- reduction in photosynthesise0
- Qualifier
- acid hydrolysis of chlorophyll ae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Simulated acid rain appeared to effect a reduction in photosynthesis largely through acid hydrolysis of chlorophyll a.”
e1“Gametophores of the moss Tortula ruralis were treated with sulfuric acid solutions”