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Salt-stress effects on avocado rootstock growth. I. Establishing criteria for determination of shoot growth sensitivity to the stress
Year:
2001
Source of publication :
Plant and Soil
Authors :
ברנשטיין, נירית
;
.
יופה, מרינה
;
.
Volume :
233
Co-Authors:
Bernstein, N., Institute of Soils, Water and Environmental Sciences, Volcani Center, PO Box 6, Bet-Dagan, 50-250, Israel
Ioffe, M., Institute of Soils, Water and Environmental Sciences, Volcani Center, PO Box 6, Bet-Dagan, 50-250, Israel
Zilberstaine, M., Institute of Soils, Water and Environmental Sciences, Volcani Center, PO Box 6, Bet-Dagan, 50-250, Israel
Facilitators :
From page:
1
To page:
11
(
Total pages:
11
)
Abstract:
The mechanisms of shoot growth inhibition under salt-stress are not yet understood. Comparative evaluation of growth tolerance level of plant material used for mechanistic studies into stress effect on growth processes is a critical step towards establishing a plant model system for studies of stress effects on growth. In the present study, numerous vegetative shoot-growth parameters were evaluated as criteria for determination of shoot growth sensitivity of avocado rootstocks (Persea americana Mill.) to salt-stress. Seven different West-Indian rootstocks were investigated for their growth response to the stress. The plants, grown in 50 L soil-filled containers, were treated with 4 mM Na and 6 mM Cl (control) or 18 mM Na and 20 mM Cl (salt) for a period of 3 years. Changes in trunk diameter, branch diameter, number of new branches, branch fresh weight (FW) and dry weight (DW), leaf length, leaf area, leaf number, leaf FW and DW and distribution of the leaf population into size classes, were quantified during the season of rapid shoot growth, and used for grading growth sensitivity. The seven rootstocks studied were ranked according to the sensitivity of their vegetative growth to the stress. The order of sensitivity was found to be similar when the ranking was based on changes in DW and FW deposition per branch, cumulative leaf area and leaf weight per branch, or branch stem weight. Stress effects on leaf FW deposition were similar to the effect on total branch FW. Stress effects on branch stem FW were closely related to total branch DW deposition. Inhibition of cumulative leaf area per branch was less sensitive to the stress than deposition of FW or DW biomass. Biomass production per branch, or alternatively leaf biomass production per branch, is suggested as a practical parameter for evaluation of avocado rootstock shoot growth sensitivity to salt-stress.
Note:
Related Files :
Branch
growth response
Leaf
Persea
Persea americana
plant
root system
salinity
Salinity tolerance
salt
עוד תגיות
תוכן קשור
More details
DOI :
10.1023/A:1010370802773
Article number:
323426
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
19059
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:26
Scientific Publication
Salt-stress effects on avocado rootstock growth. I. Establishing criteria for determination of shoot growth sensitivity to the stress
233
Bernstein, N., Institute of Soils, Water and Environmental Sciences, Volcani Center, PO Box 6, Bet-Dagan, 50-250, Israel
Ioffe, M., Institute of Soils, Water and Environmental Sciences, Volcani Center, PO Box 6, Bet-Dagan, 50-250, Israel
Zilberstaine, M., Institute of Soils, Water and Environmental Sciences, Volcani Center, PO Box 6, Bet-Dagan, 50-250, Israel
Salt-stress effects on avocado rootstock growth. I. Establishing criteria for determination of shoot growth sensitivity to the stress
The mechanisms of shoot growth inhibition under salt-stress are not yet understood. Comparative evaluation of growth tolerance level of plant material used for mechanistic studies into stress effect on growth processes is a critical step towards establishing a plant model system for studies of stress effects on growth. In the present study, numerous vegetative shoot-growth parameters were evaluated as criteria for determination of shoot growth sensitivity of avocado rootstocks (Persea americana Mill.) to salt-stress. Seven different West-Indian rootstocks were investigated for their growth response to the stress. The plants, grown in 50 L soil-filled containers, were treated with 4 mM Na and 6 mM Cl (control) or 18 mM Na and 20 mM Cl (salt) for a period of 3 years. Changes in trunk diameter, branch diameter, number of new branches, branch fresh weight (FW) and dry weight (DW), leaf length, leaf area, leaf number, leaf FW and DW and distribution of the leaf population into size classes, were quantified during the season of rapid shoot growth, and used for grading growth sensitivity. The seven rootstocks studied were ranked according to the sensitivity of their vegetative growth to the stress. The order of sensitivity was found to be similar when the ranking was based on changes in DW and FW deposition per branch, cumulative leaf area and leaf weight per branch, or branch stem weight. Stress effects on leaf FW deposition were similar to the effect on total branch FW. Stress effects on branch stem FW were closely related to total branch DW deposition. Inhibition of cumulative leaf area per branch was less sensitive to the stress than deposition of FW or DW biomass. Biomass production per branch, or alternatively leaf biomass production per branch, is suggested as a practical parameter for evaluation of avocado rootstock shoot growth sensitivity to salt-stress.
Scientific Publication
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