Abstract
The water status of the leaves of several evergreen plants was investigated in order to discuss the geopgraphical distribution of them. Relastionship between relative water content and water potential of the leaves showed linear decrease for evergreen conifers but exponential decrease for Korean box tree (Buxus microphylla var. koreana). On the basis of the leaf water potential, the water status of the conifers during wintering was distinctly divided into three periods; hardening, cold resistance and dehardening, but lacking in those periods for the Korean box tree, where the status continously decreased. In the cold resistance the leaf water potentials were -23 bar for both spruce (Picea jezoensis) and yew (Taxus cuspidata). From these results and threshold temperature at beginning of hardening, distribution of the conifers was explained that in order of the red pine, the Korean white pine, the yew and the spruce the distribution could be extended at higher altitudes and in more northward areas, whereas the distribution of the Korean box tree was restricted to the lowland of temperate zone.
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Claims 8
Claim · model-written summary
Conifer leaf relative water content and water potential showed a linear decrease.
Verbatim
e0“Relastionship between relative water content and water potential of the leaves showed linear decrease for evergreen conifers”
Claim · model-written summary
Korean box tree showed an exponential decrease in the leaf water relation.
- Taxon
- Korean box tree (Buxus microphylla var. koreana)
Buxus sinica var. koreanae0 - Organ / stage
- leavese1
- Outcome
- relative water content and water potential of the leavese1
- Direction
- exponential decreasee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exponential decrease for Korean box tree (Buxus microphylla var. koreana)”
t0“Water Status of Several Evergreen Plants during Overwintering”
t1“Water Status of Several Evergreen Plants during Overwintering”
e1“Relastionship between relative water content and water potential of the leaves showed linear decrease for evergreen conifers”
Claim · model-written summary
Conifer winter leaf water status divided into hardening, cold resistance and dehardening periods.
- Outcome
- water status of the conifers during wintering was distinctly divided into three periods; hardening, cold resistance and dehardeninge0
Verbatim
e0“the water status of the conifers during wintering was distinctly divided into three periods; hardening, cold resistance and dehardening”
Claim · model-written summary
Korean box tree lacked those periods and water status continuously decreased.
Verbatim
e0“lacking in those periods for the Korean box tree, where the status continously decreased”
Claim · model-written summary
Spruce leaf water potential was -23 bar during cold resistance.
- Taxon
- spruce (Picea jezoensis)
Picea jezoensise0 - Outcome
- leaf water potentialse1
- Value
- -23 bare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“-23 bar for both spruce (Picea jezoensis) and yew (Taxus cuspidata)”
t0“Water Status of Several Evergreen Plants during Overwintering”
t1“Water Status of Several Evergreen Plants during Overwintering”
e1“In the cold resistance the leaf water potentials were -23 bar for both spruce (Picea jezoensis) and yew (Taxus cuspidata)”
Claim · model-written summary
Yew leaf water potential was -23 bar during cold resistance.
- Taxon
- yew (Taxus cuspidata)
Taxus cuspidatae0 - Outcome
- leaf water potentialse1
- Value
- -23 bare0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“-23 bar for both spruce (Picea jezoensis) and yew (Taxus cuspidata)”
t0“Water Status of Several Evergreen Plants during Overwintering”
t1“Water Status of Several Evergreen Plants during Overwintering”
e1“In the cold resistance the leaf water potentials were -23 bar for both spruce (Picea jezoensis) and yew (Taxus cuspidata)”
Claim · model-written summary
The inferred conifer range extends progressively farther uphill and northward from red pine to white pine to yew to spruce.
Verbatim
e0“in order of the red pine, the Korean white pine, the yew and the spruce the distribution could be extended at higher altitudes and in more northward areas”
t0“Water Status of Several Evergreen Plants during Overwintering”
t1“Water Status of Several Evergreen Plants during Overwintering”
e1“Relastionship between relative water content and water potential of the leaves showed linear decrease for evergreen conifers”
Claim · model-written summary
Korean box tree distribution was inferred to be restricted to temperate lowlands.
Verbatim
e0“the distribution of the Korean box tree was restricted to the lowland of temperate zone”