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Interrelationship between phosphorus toxicity and sugar metabolism in Verticordia plumosa L
Year:
2002
Source of publication :
Plant and Soil
Authors :
Ackerman, Alexander
;
.
Bar-Tal, Asher
;
.
Ben-Jaacov, Jaacov
;
.
Granot, David
;
.
Levkovitch, Irit
;
.
Matsevitz, Tanya
;
.
Silber, Avner
;
.
Swartzberg, Dvora
;
.
Volume :
245
Co-Authors:
Silber, A., Inst. Soils, Water and Environ. Sci., Bet Dagan, 50250, Israel
Ben-Jaacov, J., Dept. of Ornamental Horticulture, Bet Dagan, 50250, Israel
Ackerman, A., Dept. of Ornamental Horticulture, Bet Dagan, 50250, Israel
Bar-Tal, A., Inst. Soils, Water and Environ. Sci., Bet Dagan, 50250, Israel
Levkovitch, I., Inst. Soils, Water and Environ. Sci., Bet Dagan, 50250, Israel
Matsevitz-Yosef, T., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Swartzberg, D., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Riov, J., Center for Horticultural Research, Hebrew University of Jerusalem, 76100 Rehovot, Israel
Granot, D., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Facilitators :
From page:
249
To page:
260
(
Total pages:
12
)
Abstract:
Phosphorus, an essential plant nutrient, may become toxic when accumulated by plants to high concentrations. Certain plant species such as Verticordia plumosa L. suffer from P toxicity at solution concentrations far lower than most other plant species. In this study, exposure of V. plumosa plants to a solution containing as low as 3 mg l-1 P resulted in significant growth inhibition and typical symptoms of P toxicity. In a wide range of P levels studied, micronutrient concentrations in V. plumosa leaves were within the range considered adequate for optimal growth. Notably, tomato plants with high hexokinase activity due to overexpression of Arabidopsis hexokinase (AtHXK1) exhibited senescence symptoms similar to those of P toxic V. plumosa. The resemblance in senescence symptoms between P-toxic tomato plants and those with high hexokinase activity suggested that increased sugar metabolism could play a role in P toxicity in plants. To test this hypothesis, we determined the amount of hexose phosphate, the product of hexokinase, in V. plumosa leaves grown at various P levels in the nutrient solution. Positive correlations were found between concentration in the medium, P concentration in the plant, hexose phosphate concentration in leaves and P toxicity symptoms. Foliar Zn application suppressed P toxicity symptoms and reduced the level of hexose phosphate in leaves. Furthermore, Zn also inhibited hexokinase activity in vitro. Based on these results we suggest that P toxicity involves sugar metabolism via increased activity of hexokinase that accelerates senescence.
Note:
Related Files :
arabidopsis
Lycopersicon esculentum
metabolism
Phosphorus
senescence
sugar
Toxicity
Verticordia plumosa
Show More
Related Content
More details
DOI :
10.1023/A:1020432512980
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
31471
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:02
You may also be interested in
Scientific Publication
Interrelationship between phosphorus toxicity and sugar metabolism in Verticordia plumosa L
245
Silber, A., Inst. Soils, Water and Environ. Sci., Bet Dagan, 50250, Israel
Ben-Jaacov, J., Dept. of Ornamental Horticulture, Bet Dagan, 50250, Israel
Ackerman, A., Dept. of Ornamental Horticulture, Bet Dagan, 50250, Israel
Bar-Tal, A., Inst. Soils, Water and Environ. Sci., Bet Dagan, 50250, Israel
Levkovitch, I., Inst. Soils, Water and Environ. Sci., Bet Dagan, 50250, Israel
Matsevitz-Yosef, T., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Swartzberg, D., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Riov, J., Center for Horticultural Research, Hebrew University of Jerusalem, 76100 Rehovot, Israel
Granot, D., Institute of Field and Garden Crops, Agricultural Research Organization, Volcani Center, Bet Dagan, 50250, Israel
Interrelationship between phosphorus toxicity and sugar metabolism in Verticordia plumosa L
Phosphorus, an essential plant nutrient, may become toxic when accumulated by plants to high concentrations. Certain plant species such as Verticordia plumosa L. suffer from P toxicity at solution concentrations far lower than most other plant species. In this study, exposure of V. plumosa plants to a solution containing as low as 3 mg l-1 P resulted in significant growth inhibition and typical symptoms of P toxicity. In a wide range of P levels studied, micronutrient concentrations in V. plumosa leaves were within the range considered adequate for optimal growth. Notably, tomato plants with high hexokinase activity due to overexpression of Arabidopsis hexokinase (AtHXK1) exhibited senescence symptoms similar to those of P toxic V. plumosa. The resemblance in senescence symptoms between P-toxic tomato plants and those with high hexokinase activity suggested that increased sugar metabolism could play a role in P toxicity in plants. To test this hypothesis, we determined the amount of hexose phosphate, the product of hexokinase, in V. plumosa leaves grown at various P levels in the nutrient solution. Positive correlations were found between concentration in the medium, P concentration in the plant, hexose phosphate concentration in leaves and P toxicity symptoms. Foliar Zn application suppressed P toxicity symptoms and reduced the level of hexose phosphate in leaves. Furthermore, Zn also inhibited hexokinase activity in vitro. Based on these results we suggest that P toxicity involves sugar metabolism via increased activity of hexokinase that accelerates senescence.
Scientific Publication
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