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Ecophysiological response to severe drought in Pinus halepensis Mill. trees of two provenances
Year:
2004
Source of publication :
Plant Ecology
Authors :
Atzmon, Nir
;
.
Moshe, Yossi
;
.
Schiller, Gabriel
;
.
Volume :
171
Co-Authors:
Atzmon, N., Dept. of Agronomy and Nat. Resources, Forestry Section, Agric. Res. Org., Volcani Ctr., P., Israel
Moshe, Y., Dept. of Agronomy and Nat. Resources, Forestry Section, Agric. Res. Org., Volcani Ctr., P., Israel
Schiller, G., Dept. of Agronomy and Nat. Resources, Forestry Section, Agric. Res. Org., Volcani Ctr., P., Israel
Facilitators :
From page:
15
To page:
22
(
Total pages:
8
)
Abstract:
As a result of predicted regional climatic changes the need to select for the more drought-tolerant genotypes (ecotypes) among Mediterranean conifers has become clear. Aleppo pine (Pinus halepensis Mill.) seems to be one of the most drought-tolerant pine species. Nevertheless, the existence of geographical trends in their genetic differentiation indicates potentially large differences in drought-tolerance among provenances. This assumption was verified by the finding of large variation among provenances in their internal water relations. Hence, the aim of this study was to compare the ecophysiological behaviour of several Aleppo pine provenances under contrasting climatic conditions. Growth parameters (height and diameter) and survival rate were measured in two provenance trials, one planted under sub-desertic conditions at the northern edge of the Negev desert, and the second under thermo-Mediterranean climatic conditions in the central coastal plains, Israel. Ecophysiological parameters such as: predawn needle water potential, sap flow in the xylem (i.e. transpiration), photosynthesis and water-use efficiency were measured in trees of selected provenances. The results suggest that it is not possible to predict provenance performance under harsh conditions from their performance under more favourable ones. Therefore, selection must be carried out under the exact conditions in which the trees from the resultant selection will be planted. The present study clearly emphasises the need for broad selection programs of P. halepensis.
Note:
Related Files :
climate change
drought
drought resistance
drought tolerance
ecophysiology
Israel
Negev
Pinus halepensis
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Related Content
More details
DOI :
10.1023/B:VEGE.0000029371.44518.38
Article number:
Affiliations:
Database:
Scopus
Publication Type:
Conference paper
;
.
Language:
English
Editors' remarks:
ID:
31174
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:00
Scientific Publication
Ecophysiological response to severe drought in Pinus halepensis Mill. trees of two provenances
171
Atzmon, N., Dept. of Agronomy and Nat. Resources, Forestry Section, Agric. Res. Org., Volcani Ctr., P., Israel
Moshe, Y., Dept. of Agronomy and Nat. Resources, Forestry Section, Agric. Res. Org., Volcani Ctr., P., Israel
Schiller, G., Dept. of Agronomy and Nat. Resources, Forestry Section, Agric. Res. Org., Volcani Ctr., P., Israel
Ecophysiological response to severe drought in Pinus halepensis Mill. trees of two provenances
As a result of predicted regional climatic changes the need to select for the more drought-tolerant genotypes (ecotypes) among Mediterranean conifers has become clear. Aleppo pine (Pinus halepensis Mill.) seems to be one of the most drought-tolerant pine species. Nevertheless, the existence of geographical trends in their genetic differentiation indicates potentially large differences in drought-tolerance among provenances. This assumption was verified by the finding of large variation among provenances in their internal water relations. Hence, the aim of this study was to compare the ecophysiological behaviour of several Aleppo pine provenances under contrasting climatic conditions. Growth parameters (height and diameter) and survival rate were measured in two provenance trials, one planted under sub-desertic conditions at the northern edge of the Negev desert, and the second under thermo-Mediterranean climatic conditions in the central coastal plains, Israel. Ecophysiological parameters such as: predawn needle water potential, sap flow in the xylem (i.e. transpiration), photosynthesis and water-use efficiency were measured in trees of selected provenances. The results suggest that it is not possible to predict provenance performance under harsh conditions from their performance under more favourable ones. Therefore, selection must be carried out under the exact conditions in which the trees from the resultant selection will be planted. The present study clearly emphasises the need for broad selection programs of P. halepensis.
Scientific Publication
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