Expression of genes for sucrose synthase and UDP-glucose pyrophosphorylase under changing conditions of Pi and sucrose (in Polish) (Zeszyty Problemowe Postepow Nauk Rolniczych 481: 281-287). Ciereszko, I. & Kleczkowski, L. 481:281–287, January, 2002. abstract bibtex The effect of inorganic phosphate (Pi) level and carbohydrate/osmotic status on expression of genes encoding UDP-glucose pyrophosphorylase (Ugp) and sucrose synthase (Sus1) were investigated in Arabidopsis thaliana (L.) HEYNH. leaves. Phosphate deficiency strongly induced Ugp gene expression and had no influence on the level of Sus1 transcript in the leaves of Arabidopsis. Feeding leaves with Pi, at the concentration of 20-200 mmol-dm⁻³, increased Sus1 expression and had no significant effect on Ugp transcript level. Genes for UDP-glucose pyrophosphorylase and sucrose synthase were found to be strongly regulated by sugar and sugar/osmoticum, respectively. The increase of Ugp and Sus1 expression after feeding of sucrose to the leaves of pho1 mutant of Arabidopsis was not significantly higher than the transcripts level in wild-type plants. Sucrose, exogenously provided to the leaves of pho2 mutant had lower effect on Ugp transcript level than in wild-type plants, however Sus1 upregulation was higher in pho2 than in w-t. Sucrose-related induction of Ugp was inhibited by okadaic acid, an inhibitor of protein phosphatases; on the other hand, Sus1 expression was enhanced after okadaic acid treatment. The obtained results suggest that Ugp and Sus1 genes expression, both P- modulated and sugar/osmoticum-dependent, are regulated via distinct sensing mechanisms and distinct signaling pathways and are closely involved in homeos- tatic readjustments of plant responses to environmental stresses.
@article{ciereszko_expression_2002,
title = {Expression of genes for sucrose synthase and {UDP}-glucose pyrophosphorylase under changing conditions of {Pi} and sucrose (in {Polish}) ({Zeszyty} {Problemowe} {Postepow} {Nauk} {Rolniczych} 481: 281-287)},
volume = {481},
shorttitle = {Expression of genes for sucrose synthase and {UDP}-glucose pyrophosphorylase under changing conditions of {Pi} and sucrose (in {Polish}) ({Zeszyty} {Problemowe} {Postepow} {Nauk} {Rolniczych} 481},
abstract = {The effect of inorganic phosphate (Pi) level and carbohydrate/osmotic status on expression of genes encoding UDP-glucose pyrophosphorylase (Ugp) and sucrose synthase (Sus1) were investigated in Arabidopsis thaliana (L.) HEYNH. leaves. Phosphate deficiency strongly induced Ugp gene expression and had no influence on the level of Sus1 transcript in the leaves of Arabidopsis. Feeding leaves with Pi, at the concentration of 20-200 mmol-dm⁻³, increased Sus1 expression and had no significant effect on Ugp transcript level. Genes for UDP-glucose pyrophosphorylase and sucrose synthase were found to be strongly regulated by sugar and sugar/osmoticum, respectively. The increase of Ugp and Sus1 expression after feeding of sucrose to the leaves of pho1 mutant of Arabidopsis was not significantly higher than the transcripts level in wild-type plants. Sucrose, exogenously provided to the leaves of pho2 mutant had lower effect on Ugp transcript level than in wild-type plants, however Sus1 upregulation was higher in pho2 than in w-t. Sucrose-related induction of Ugp was inhibited by okadaic acid, an inhibitor of protein phosphatases; on the other hand, Sus1 expression was enhanced after okadaic acid treatment. The obtained results suggest that Ugp and Sus1 genes expression, both P- modulated and sugar/osmoticum-dependent, are regulated via distinct sensing mechanisms and distinct signaling pathways and are closely involved in homeos- tatic readjustments of plant responses to environmental stresses.},
author = {Ciereszko, Iwona and Kleczkowski, Leszek},
month = jan,
year = {2002},
pages = {281--287},
}
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Phosphate deficiency strongly induced Ugp gene expression and had no influence on the level of Sus1 transcript in the leaves of Arabidopsis. Feeding leaves with Pi, at the concentration of 20-200 mmol-dm⁻³, increased Sus1 expression and had no significant effect on Ugp transcript level. Genes for UDP-glucose pyrophosphorylase and sucrose synthase were found to be strongly regulated by sugar and sugar/osmoticum, respectively. The increase of Ugp and Sus1 expression after feeding of sucrose to the leaves of pho1 mutant of Arabidopsis was not significantly higher than the transcripts level in wild-type plants. Sucrose, exogenously provided to the leaves of pho2 mutant had lower effect on Ugp transcript level than in wild-type plants, however Sus1 upregulation was higher in pho2 than in w-t. Sucrose-related induction of Ugp was inhibited by okadaic acid, an inhibitor of protein phosphatases; on the other hand, Sus1 expression was enhanced after okadaic acid treatment. The obtained results suggest that Ugp and Sus1 genes expression, both P- modulated and sugar/osmoticum-dependent, are regulated via distinct sensing mechanisms and distinct signaling pathways and are closely involved in homeos- tatic readjustments of plant responses to environmental stresses.","author":[{"propositions":[],"lastnames":["Ciereszko"],"firstnames":["Iwona"],"suffixes":[]},{"propositions":[],"lastnames":["Kleczkowski"],"firstnames":["Leszek"],"suffixes":[]}],"month":"January","year":"2002","pages":"281–287","bibtex":"@article{ciereszko_expression_2002,\n\ttitle = {Expression of genes for sucrose synthase and {UDP}-glucose pyrophosphorylase under changing conditions of {Pi} and sucrose (in {Polish}) ({Zeszyty} {Problemowe} {Postepow} {Nauk} {Rolniczych} 481: 281-287)},\n\tvolume = {481},\n\tshorttitle = {Expression of genes for sucrose synthase and {UDP}-glucose pyrophosphorylase under changing conditions of {Pi} and sucrose (in {Polish}) ({Zeszyty} {Problemowe} {Postepow} {Nauk} {Rolniczych} 481},\n\tabstract = {The effect of inorganic phosphate (Pi) level and carbohydrate/osmotic status on expression of genes encoding UDP-glucose pyrophosphorylase (Ugp) and sucrose synthase (Sus1) were investigated in Arabidopsis thaliana (L.) 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