uid=HFR,o=lter,dc=ecoinformatics,dc=org
all
public
read
doi:10.6073/pasta/91324b87c9b95e2e7420247e76d452b6
Hydraulic Pathways in Leaves of Temperate Trees at Harvard Forest 2002
Colin
Orians
https://orcid.org/0000-0003-3773-0894
Lawren
Sack
https://orcid.org/0000-0002-7009-7202
Researcher
Sigrid
Smith
Researcher
2023
English
The transport of water, sugar and nutrients in trees is restricted to specific vascular pathways, and thus organs may be relatively isolated from one another (=sectored). Strongly sectored leaf-to-leaf pathways have been shown for the transport of sugar and signal molecules within a shoot, but not previously for water transport. The hydraulic sectoriality of leaf-to-leaf pathways was determined for current year shoots of six temperate deciduous tree species (three ring-porous: Castanea dentata, Fraxinus americana and Quercus rubra, and three diffuse-porous: Acer saccharum, Betula papyrifera and Liriodendron tulipifera). Hydraulic sectoriality was determined using dye staining and a hydraulic method. In the dye method, leaf blades were removed, and dye was forced into the most proximal petiole. For each petiole we counted the vascular traces shared with the proximal petiole. For other shoots, measurements were made of the leaf-area specific hydraulic conductivity for leaf-to-leaf pathways (kLL). In five of six species patterns of sectoriality reflected phyllotaxy; both the sharing of vascular bundles between leaves and kLL were higher for orthostichous than non-orthostichous leaf pairs. Species-differences in leaf-to-leaf sectoriality were determined as the proportional differences between non-orthostichous vs. orthostichous leaf pairs in their staining of shared vascular bundles and in their kLL; for the six species these two indices of sectoriality were strongly correlated (R2 = 0.94; P less than 0.001). Species varied 8-fold in their kLL-based sectoriality, and ring-porous species were more sectored than diffuse-porous species. Differential leaf-to-leaf sectoriality has implications for species-specific coordination of leaf gas exchange and water relations within a branch, especially during fluctuations in irradiance, water and nutrient availability.
hydraulic conductance
leaves
physiology
porosity
LTER controlled vocabulary
organic matter
LTER core area
Harvard Forest
HFR
LTER
USA
HFR default
This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). Please keep the dataset creators informed of any plans to use the dataset. Consultation with the original investigators is strongly encouraged. Publications and data products that make use of the dataset should include proper acknowledgement.
Creative Commons Zero v1.0 Universal
https://spdx.org/licenses/CC0-1.0.html
CC0-1.0
https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf092
Prospect Hill Tract (Harvard Forest). Coordinates based on WGS84 datum.
-72.18
-72.18
+42.53
+42.53
340
340
meter
2002
2002
genus
Acer
species
saccharum
sugar maple
genus
Betula
species
papyrifera
paper birch
genus
Castanea
species
dentata
chestnut
genus
Fraxinus
species
americana
white ash
genus
Liriodendron
species
tulipifera
tulip poplar
genus
Quercus
species
rubra
red oak
complete
Information Manager
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
hf-im@lists.fas.harvard.edu
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
(978) 724-3595
https://harvardforest.fas.harvard.edu
For detailed methods see the published paper: Orians, C., S. Smith, and L. Sack. 2005. How are leaves plumbed inside a branch? differences in leaf-to-leaf sectoriality among six temperate tree species. Journal of Experimental Botany 56: 2267-2273.
Harvard Forest Long-Term Ecological Research
Harvard Forest
324 North Main Street
Petersham
MA
01366
USA
(978) 724-3302
(978) 724-3595
https://harvardforest.fas.harvard.edu
https://ror.org/059cpzx98
pointOfContact
The Harvard Forest Long-Term Ecological Research (LTER) program examines ecological dynamics in the New England region resulting from natural disturbances, environmental change, and human impacts.
National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210.
hf092-01-hydraulic.csv
hydraulic data
hf092-01-hydraulic.csv
4990
2511c91d10aeb1164725f84751f205cf
1
\r\n
column
,
https://harvardforest.fas.harvard.edu/data/p09/hf092/hf092-01-hydraulic.csv
species
species code
AcSa
Acer saccharum
BePa
Betula papyrifera
CaDe
Castanea dentata
FrAm
Fraxinus americana
LiTu
Liriodendron tulipifera
QuRu
Quercus rubra
date
date sample was analyzed
YYYY-MM-DD
1 day
p2norm.resis
resistance of water flow from petiole 1 to petiole 2 normalized by leaf area of leaf #2. (MPa/kg/sec)*Area (m2)
number
0.001
real
NA
missing value
p2rlld
resistance of water flow from petiole 1 to petiole 2 normalized by leaf #2 area and distance between the two petioles (MPa/kg/sec)*Area (m2)/distance (m)
number
0.001
real
NA
missing value
p2norm.conduct
conductance of water flow from petiole 1 to petiole 2 normalized by leaf area of leaf#2 (mmol/s/MPa/m2)
number
0.001
real
NA
missing value
p2klld
conductance of water flow from petiole 1 to petiole 2 normalized by leaf #2 area and distance between the two petioles (mmol/s/MPa/m)
number
0.001
real
NA
missing value
p3norm.resis
resistance of water flow from petiole 1 to petiole 3 normalized by leaf area of leaf #3 (MPa/kg/sec)*Area (m2)
number
0.001
real
NA
missing value
p3rlld
resistance of water flow from petiole 1 to petiole 3 normalized by leaf #3 area and distance between the two petioles (MPa/kg/sec)*Area (m2)/distance (m)
number
0.001
real
NA
missing value
p3norm.conduct
conductance of water flow from petiole 1 to petiole 3 normalized by leaf area of leaf#3 (mmol/s/MPa/m2)
number
0.001
real
NA
missing value
p3klld
conductance of water flow from petiole 1 to petiole 3 normalized by leaf #3 area and distance between the two petioles (mmol/s/MPa/m)
number
0.001
real
NA
missing value
p4norm.resis
resistance of water flow from petiole 1 to petiole 4 normalized by leaf area of leaf #4 (MPa/kg/sec)*Area (m2)
number
0.001
real
NA
missing value
p4rlld
resistance of water flow from petiole 1 to petiole 4 normalized by leaf #4 area and distance between the two petioles (MPa/kg/sec)*Area (m2)/distance (m)
number
0.001
real
NA
missing value
p4norm.conduct
conductance of water flow from petiole 1 to petiole 4 normalized by leaf area of leaf#4 (mmol/s/MPa/m2)
number
0.001
real
NA
missing value
p4klld
conductance of water flow from petiole 1 to petiole 4 normalized by leaf #4 area and distance between the two petioles (mmol/s/MPa/m)
number
0.001
real
NA
missing value
p5norm.resis
resistance of water flow from petiole 1 to petiole 5 normalized by leaf area of leaf #5 (MPa/kg/sec)*Area (m2)
number
0.001
real
NA
missing value
p5rlld
resistance of water flow from petiole 1 to petiole 5 normalized by leaf #5 area and distance between the two petioles. (MPa/kg/sec)*Area (m2)/distance (m)
number
0.001
real
NA
missing value
p5norm.conduct
conductance of water flow from petiole 1 to petiole 5 normalized by leaf area of leaf#5 (mmol/s/MPa/m2)
number
0.001
real
NA
missing value
p5klld
conductance of water flow from petiole 1 to petiole 5 normalized by leaf #5 area and distance between the two petioles (mmol/s/MPa/m)
number
0.001
real
NA
missing value
p6norm.resis
resistance of water flow from petiole 1 to petiole 6 normalized by leaf area of leaf #6 (MPa/kg/sec)*Area (m2)
number
0.001
real
NA
missing value
p6rlld
resistance of water flow from petiole 1 to petiole 6 normalized by leaf #6 area and distance between the two petioles (MPa/kg/sec)*Area (m2)/distance (m)
number
0.001
real
NA
missing value
p6norm.conduct
conductance of water flow from petiole 1 to petiole 6 normalized by leaf area of leaf#6 (mmol/s/MPa/m2)
number
0.001
real
NA
missing value
k6rlld
conductance of water flow from petiole 1 to petiole 6 normalized by leaf #6 area and distance between the two petioles (mmol/s/MPa/m)
number
0.001
real
NA
missing value
p2dye
percent of xylem traces entering petiole 2 with dye when Safranin dye is applied through petiole 1
dimensionless
0.001
real
NA
missing value
p3dye
percent of xylem traces entering petiole 3 with dye when Safranin dye is applied through petiole 1
dimensionless
0.001
real
NA
missing value
p4dye
percent of xylem traces entering petiole 4 with dye when Safranin dye is applied through petiole 1
dimensionless
0.001
real
NA
missing value
p5dye
percent of xylem traces entering petiole 5 with dye when Safranin dye is applied through petiole 1
dimensionless
0.001
real
NA
missing value
p6dye
percent of xylem traces entering petiole 6 with dye when Safranin dye is applied through petiole 1
dimensionless
0.001
real
NA
missing value
25
community
short-term measurement