Abstract
Relative water content, solute concentrations, and osmolality were determined in the water storage tissue (hydrenchyma) and the assimilatory tissue (chlorenchyma) of the succulent leaves of Peperomia magnoliaefolia (Jac) (Piperaceae) during slow desiccation. Relative water loss was significantly greater for the hydrenchyma than for the chlorenchyma. When whole leaves had lost 50% of their initial water content, the concomitant decrease of the relative water content of the hydrenchyma was 75 to 85%, but of the chlorenchyma only 15 to 25%. In spite of this differential water loss, the osmolality in both tissues increased to the same extent, indicating solute flow from the hydrenchyma to the chlorenchyma during desiccation. Solute translocation appeared to be unspecific, probably reflecting symplastic mass flow from one tissue to the other. The observed volume preservation of the chlorenchyma stabilized photosynthesis of Peperomia magnoliaefolia (Jac) leaves, which was less inhibited by a given decrease of the relative water content of the whole leaves than in nonsucculent leaves.
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Claims 7
Claim · model-written summary
Relative water loss in Peperomia magnoliaefolia leaves was significantly greater for the hydrenchyma than for the chlorenchyma.
- Taxon
- Peperomia magnoliaefolia
Peperomia magnoliifoliat0 - Organ / stage
- hydrenchymae0
- Outcome
- Relative water losse0
- Direction
- greatere0
- Comparator
- chlorenchymae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peperomia magnoliaefolia”
e0“Relative water loss was significantly greater for the hydrenchyma than for the chlorenchyma”
Claim · model-written summary
When whole leaves had lost 50% of their initial water content, the relative water content of the hydrenchyma decreased by 75 to 85%.
- Taxon
- Peperomia magnoliaefoliaPeperomia magnoliifoliat0
- Organ / stage
- hydrenchymae0
- Outcome
- decrease of the relative water contente0
- Direction
- decreasee0
- Value
- 75 to 85%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peperomia magnoliaefolia”
e0“When whole leaves had lost 50% of their initial water content, the concomitant decrease of the relative water content of the hydrenchyma was 75 to 85%”
Claim · model-written summary
When whole leaves had lost 50% of their initial water content, the relative water content of the chlorenchyma decreased by only 15 to 25%.
- Taxon
- Peperomia magnoliaefoliaPeperomia magnoliifoliat0
- Organ / stage
- chlorenchymae0
- Outcome
- decrease of the relative water contente0
- Direction
- decreasee0
- Value
- 15 to 25%e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peperomia magnoliaefolia”
e0“When whole leaves had lost 50% of their initial water content, the concomitant decrease of the relative water content of the hydrenchyma was 75 to 85%, but of the chlorenchyma only 15 to 25%”
Claim · model-written summary
The osmolality in both hydrenchyma and chlorenchyma increased to the same extent during desiccation.
- Taxon
- Peperomia magnoliaefoliaPeperomia magnoliifoliat0
- Organ / stage
- both tissuese0
- Outcome
- osmolalitye0
- Direction
- increasede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peperomia magnoliaefolia”
e0“the osmolality in both tissues increased to the same extent”
Claim · model-written summary
The equal osmolality increase indicates solute flow from the hydrenchyma to the chlorenchyma during desiccation.
- Taxon
- Peperomia magnoliaefoliaPeperomia magnoliifoliat0
- Organ / stage
- hydrenchymae0
- Outcome
- solute flowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peperomia magnoliaefolia”
e0“indicating solute flow from the hydrenchyma to the chlorenchyma during desiccation”
Claim · model-written summary
Solute translocation appeared to be unspecific, probably reflecting symplastic mass flow from one tissue to the other.
- Taxon
- Peperomia magnoliaefoliaPeperomia magnoliifoliat0
- Outcome
- Solute translocatione0
- Qualifier
- probably reflecting symplastic mass flowe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peperomia magnoliaefolia”
e0“Solute translocation appeared to be unspecific, probably reflecting symplastic mass flow from one tissue to the other”
Claim · model-written summary
Volume preservation of the chlorenchyma stabilized photosynthesis, which was less inhibited by a given decrease in leaf relative water content than in nonsucculent leaves.
- Taxon
- Peperomia magnoliaefoliaPeperomia magnoliifoliat0
- Organ / stage
- chlorenchymae0
- Outcome
- photosynthesise0
- Direction
- less inhibitede0
- Qualifier
- volume preservation of the chlorenchymae0
- Comparator
- nonsucculent leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Peperomia magnoliaefolia”
e0“The observed volume preservation of the chlorenchyma stabilized photosynthesis of Peperomia magnoliaefolia (Jac) leaves, which was less inhibited by a given decrease of the relative water content of the whole leaves than in nonsucculent leaves”