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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Grapevine anatomy as a possible determinant of isohydric or anisohydric behavior
Year:
2015
Authors :
ביטון, איריס
;
.
בן-ארי, גיורא
;
.
יניב, יוסי
;
.
צמח, חניתה
;
.
Volume :
66
Co-Authors:
Gerzon, E., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel, Institute of Plant Sciences, Hebrew University of Jerusalem, Rehovot, Israel
Biton, I., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Yaniv, Y., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Zemach, H., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Netzer, Y., Institute of Plant Sciences, Hebrew University of Jerusalem, Rehovot, Israel, The Shomron and Jordan Rift Regional Research and Development, Israel
Schwartz, A., Institute of Plant Sciences, Hebrew University of Jerusalem, Rehovot, Israel
Fait, A., The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
Ben-Ari, G., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Facilitators :
From page:
340
To page:
347
(
Total pages:
8
)
Abstract:
Isohydric plants maintain constant water potential through rapid stomatal closure, whereas anisohydric plants only close their stomata at very low water potentials. However, distinctions between isohydric and anisohydric behaviors among different cultivars of the same species are unclear. This study compared the physiological response to prolonged drought stress in the isohydric Grenache and the anisohydric Shiraz cultivars of the Vitis vinifera species. Plants were exposed to 60-day periods of deficit irrigation (25% of plant water consumption under well-watered conditions) during the summers of 2011 and 2012. Physiological measurements, water potential, leaf gas exchange, canopy area, leaf senescence, stem characteristics, and morphological characteristics were analyzed. Stomatal conductance was consistently lower in Grenache than in Shiraz at all values of midday stem and predawn leaf water potentials, respectively. The Shiraz plants exhibited greater vegetative growth and less defoliation than the Grenache plants in response to water deficit. Anatomical architecture analyses revealed that Grenache plants had greater xylem vessel diameter, hydraulic conductivity, and stomatal density than the Shiraz plants. These results suggest isohydric and anisohydric behaviors may be well-defined, time-regulated responses rather than distinct mechanisms that plants use to cope with drought stress. The rapid response to water deficit exhibited by isohydric plants may be because they are more vulnerable to fatal xylem embolisms than anisohydric plants. Thus, the accelerated response allows isohydric plants to avoid drought stress and minimize risk of xylem cavitation, but may lower the plant’s ability to survive moderate stress of prolonged drought. © 2015 by the American Society for Enology and Viticulture. All rights reserved.
Note:
Related Files :
drought stress
genotype
Hydraulic conductance
Stomatal conductance
Vitis
Vitis vinifera
water potential
עוד תגיות
תוכן קשור
More details
DOI :
10.5344/ajev.2015.14090
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
18604
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:22
You may also be interested in
Scientific Publication
Grapevine anatomy as a possible determinant of isohydric or anisohydric behavior
66
Gerzon, E., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel, Institute of Plant Sciences, Hebrew University of Jerusalem, Rehovot, Israel
Biton, I., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Yaniv, Y., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Zemach, H., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Netzer, Y., Institute of Plant Sciences, Hebrew University of Jerusalem, Rehovot, Israel, The Shomron and Jordan Rift Regional Research and Development, Israel
Schwartz, A., Institute of Plant Sciences, Hebrew University of Jerusalem, Rehovot, Israel
Fait, A., The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Beer-Sheva, Israel
Ben-Ari, G., Institute of Plant Sciences, Volcani Center, Agricultural Research Organization, P.O. Box 6, Bet-Dagan, Israel
Grapevine anatomy as a possible determinant of isohydric or anisohydric behavior
Isohydric plants maintain constant water potential through rapid stomatal closure, whereas anisohydric plants only close their stomata at very low water potentials. However, distinctions between isohydric and anisohydric behaviors among different cultivars of the same species are unclear. This study compared the physiological response to prolonged drought stress in the isohydric Grenache and the anisohydric Shiraz cultivars of the Vitis vinifera species. Plants were exposed to 60-day periods of deficit irrigation (25% of plant water consumption under well-watered conditions) during the summers of 2011 and 2012. Physiological measurements, water potential, leaf gas exchange, canopy area, leaf senescence, stem characteristics, and morphological characteristics were analyzed. Stomatal conductance was consistently lower in Grenache than in Shiraz at all values of midday stem and predawn leaf water potentials, respectively. The Shiraz plants exhibited greater vegetative growth and less defoliation than the Grenache plants in response to water deficit. Anatomical architecture analyses revealed that Grenache plants had greater xylem vessel diameter, hydraulic conductivity, and stomatal density than the Shiraz plants. These results suggest isohydric and anisohydric behaviors may be well-defined, time-regulated responses rather than distinct mechanisms that plants use to cope with drought stress. The rapid response to water deficit exhibited by isohydric plants may be because they are more vulnerable to fatal xylem embolisms than anisohydric plants. Thus, the accelerated response allows isohydric plants to avoid drought stress and minimize risk of xylem cavitation, but may lower the plant’s ability to survive moderate stress of prolonged drought. © 2015 by the American Society for Enology and Viticulture. All rights reserved.
Scientific Publication
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