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פותח על ידי קלירמאש פתרונות בע"מ -
An increase in xylem embolism resistance of grapevine leaves during the growing season is coordinated with stomatal regulation, turgor loss point, and intervessel pit membranes
Year:
2020
Source of publication :
New Phytologist
Authors :
הוכברג, אורי
;
.
שורק, יונתן
;
.
Volume :
Co-Authors:

Yonatan Sorek  - Institute of Soil, Water and Environmental Science, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel.; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 76100, Israel.
 Smadar Grinshtein  - Institute of Soil, Water and Environmental Science, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel. 
Yishai Netzer  - Department of Chemical engineering, Ariel University, Ariel, 40700, Israel
.; Agriculture and Oenology Department, Eastern R&D Center, Ariel, 40700, Israel.

Ilana Shtein  - Agriculture and Oenology Department, Eastern R&D Center, Ariel, 40700, Israel. 
Steven Jansen  - Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11, D-89081, Ulm, Germany. 
Uri Hochberg  - Institute of Soil, Water and Environmental Science, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
.

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

Although xylem embolism resistance is traditionally considered as static, we hypothesized that in grapevine (Vitis vinifera) leaf xylem becomes more embolism resistant along the growing season. We evaluated xylem architecture, turgor loss point (ΨTLP ), and water potentials leading to 25% of maximal stomatal conductance (gs25 ) or 50% embolism in the leaf xylem (P50 ) in three irrigation treatments and at three time points during the growing season, while separating the effects of leaf age and time of season. Hydraulic traits acclimated over the growing season in a coordinated manner. Without irrigation, ΨTLP , gs25 , and P50 decreased between late May and late August by 0.95, 0.77, and 0.71 MPa, respectively. A seasonal shift in P50 occurred even in mature leaves, while irrigation had only a mild effect (<0.2 MPa) on P50 . Vessel size and pit membrane thickness were also seasonally dynamic, providing a plausible explanation for the shift in P50 . Our findings provide clear evidence that grapevines can modify their hydraulic traits along a growing season to allow lower xylem water potential, without compromising gas exchange, leaf turgor, or xylem integrity. Seasonal changes should be considered when modeling ecosystem vulnerability to drought or comparing data sets acquired at different phenological stages.

Note:
Related Files :
Grapevine
hydraulic plasticity
Hydraulic vulnerability
pit membrane
seasonality
stomatal regulation
turgor loss point
Vitis vinifera
xylem
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/nph.17025
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
51419
Last updated date:
02/03/2022 17:27
Creation date:
28/10/2020 17:33
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Scientific Publication
An increase in xylem embolism resistance of grapevine leaves during the growing season is coordinated with stomatal regulation, turgor loss point, and intervessel pit membranes

Yonatan Sorek  - Institute of Soil, Water and Environmental Science, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel.; The Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, 76100, Israel.
 Smadar Grinshtein  - Institute of Soil, Water and Environmental Science, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel. 
Yishai Netzer  - Department of Chemical engineering, Ariel University, Ariel, 40700, Israel
.; Agriculture and Oenology Department, Eastern R&D Center, Ariel, 40700, Israel.

Ilana Shtein  - Agriculture and Oenology Department, Eastern R&D Center, Ariel, 40700, Israel. 
Steven Jansen  - Institute of Systematic Botany and Ecology, Ulm University, Albert-Einstein-Allee 11, D-89081, Ulm, Germany. 
Uri Hochberg  - Institute of Soil, Water and Environmental Science, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, 50250, Israel
.

An increase in xylem embolism resistance of grapevine leaves during the growing season is coordinated with stomatal regulation, turgor loss point, and intervessel pit membranes

Although xylem embolism resistance is traditionally considered as static, we hypothesized that in grapevine (Vitis vinifera) leaf xylem becomes more embolism resistant along the growing season. We evaluated xylem architecture, turgor loss point (ΨTLP ), and water potentials leading to 25% of maximal stomatal conductance (gs25 ) or 50% embolism in the leaf xylem (P50 ) in three irrigation treatments and at three time points during the growing season, while separating the effects of leaf age and time of season. Hydraulic traits acclimated over the growing season in a coordinated manner. Without irrigation, ΨTLP , gs25 , and P50 decreased between late May and late August by 0.95, 0.77, and 0.71 MPa, respectively. A seasonal shift in P50 occurred even in mature leaves, while irrigation had only a mild effect (<0.2 MPa) on P50 . Vessel size and pit membrane thickness were also seasonally dynamic, providing a plausible explanation for the shift in P50 . Our findings provide clear evidence that grapevines can modify their hydraulic traits along a growing season to allow lower xylem water potential, without compromising gas exchange, leaf turgor, or xylem integrity. Seasonal changes should be considered when modeling ecosystem vulnerability to drought or comparing data sets acquired at different phenological stages.

Scientific Publication
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