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Journals
Journal of Horticultural Research
Volume 28 (2020): Issue 1 (June 2020)
Open Access
Hydraulic Relations and Water Use of Mediterranean Ornamental Shrubs in Containers
Paolo Zuccarini
Paolo Zuccarini
,
Alejandro Galindo
Alejandro Galindo
,
Arturo Torrecillas
Arturo Torrecillas
,
Alberto Pardossi
Alberto Pardossi
and
Brent Clothier
Brent Clothier
| Jun 30, 2020
Journal of Horticultural Research
Volume 28 (2020): Issue 1 (June 2020)
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Published Online:
Jun 30, 2020
Page range:
49 - 56
Received:
Feb 01, 2020
Accepted:
May 01, 2020
DOI:
https://doi.org/10.2478/johr-2020-0009
Keywords
gas exchange
,
hydric behavior
,
Mediterranean shrubs
,
water stress
,
water use
© 2020 Paolo Zuccarini et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Fig. 1
Trend of climatic data during the days of experiment: Temperature (closed circles), vapor pressure deficit (VPD, open circles), and global radiation (RG) are shown. Error bars for each average value of temperature and VPD come from 3 measurements, taken at the hours of the day with highest radiation (11:30, 12:30, and 13:30). RG values refer to the interval 11:30–13:30
Fig. 2
Leaf area by species. Values marked with the same letter are not statistically different at p < 0.05, according to Duncan's multiple range test. Error bars were calculated from six measurements (replicates) for each average value
Fig. 3
ET/RG ratio versus substrate water tensionNote: See Fig. 2
Fig. 4
Relative stomatal conductance (gsrel) versus substrate water tensionNote: See Fig. 2
Fig. 5
Linear correlation between measured and calculated stomatal conductance; for each species, a single regression line, with slope and R2, is presented in the graph; the central dotted line represents the ideal 1 : 1 relationship between measured and calculated gs
Fig. 6
ΔT versus substrate water tension. Note: See Fig. 2
Substrate water tension (SWT) versus percentage of container capacity for the three investigated species
N. oleander
L. japonicum
P. tobira
SWT
% C.C.
SWT
% C.C.
SWT
% C.C.
8
100
18
100
23
100
26
89.5
35
90.7
41
90.7
46
78.8
41
85.6
65
85.6
78
69.6
65
76.1
90
76.1
117
59.8
101
65.3
135
65.3