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1

Induced phenylpropanoid metabolism under irradiation/allelochemical stresses

100%

Kozlowska M., Pietrowska-Borek M., Jozwiak A.

Acta Physiologiae Plantarum

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2007

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tom 29

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nr 1 Suppl.

2

Phenolics and the activities of phenylalanine ammonia-lyase, phenol-beta-glucosyltransferase and beta-glucosidase in cucumber roots as affected by phenolic allelochemicals

72%

Politycka B.

Acta Physiologiae Plantarum

|

1998

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tom 20

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nr 4

Seven-day-old seedlings of cucumber (Cucumis sativus L.) cv. Wisconsin were treated with 0.1 mM solutions of cinnamic acid (ferulic and p-coumaric acids) and benzoic acid (p-hydroxybenzoic and vanillic acids) derivatives as stressors. The content of free and glucosylated soluble phenols and the activity of phenylalanine ammonia-lyase (E.C.4.3.1.5), phenol-β-glucosyltransferase (E.C.2.4.1.35.), and β-glucosidase (E.C.3.2.1.21.) in seedling roots as well as their length and fresh weight were examined. Changes in glucosylated phenolic content and phenol-β-glucosyltranspherase activity were observed under the influence of all phenolics applied. Treatment with ferulic and p-coumaric acids stimulated the increase of phenylalanine ammonia-lyase and β-glucosidase activity and slightly inhibited cucumber root growth.

3

Changes in free polyamine level and di- and polyamine oxidase activity in cucumber roots under allelochemical stress conditions

72%

Politycka B., Kubis J.

Acta Physiologiae Plantarum

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2000

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tom 22

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nr 1

4

Peroxidase activity and lipid peroxidation in roots of cucumber seedlings influenced by derivatives of cinnamic and benzoic acids

72%

Politycka B.

Acta Physiologiae Plantarum

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1996

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tom 18

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nr 4

5

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Response of maize, pea and radish roots to allelochemical stress

58%

Gmerek J., Politycka B.

Acta Biologica Cracoviensia. Series Botanica

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2011

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tom 53

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nr 1

We examined whether allelochemical stress leads to increased lipoxygenase activity in roots of sweet maize (Zea mays L. ssp. saccharata), pea (Pisum sativum L.) and radish (Raphanus sativum L. var. radicula). The lipoxygenase activity of soluble and membrane-bound fractions was assessed in roots after exposure to ferulic and p-coumaric acids. Lipid peroxidation and membrane injury were determined as indicators of stress. Increased lipoxygenase activity of both studied fractions was followed by lipid peroxidation and plasma membrane injury. The results suggest the key role of lipoxygenase in plasma membrane injury during allelochemical stress caused by administration of hydroxycinnamic acids.

6

Free and glucosylated phenolics, phenol beta-glucosyltransferase activity and membrane permeability in cucumber roots affected by derivatives of cinnamic and benzoic acids

58%

Politycka B.

Acta Physiologiae Plantarum

|

1997

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tom 19

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nr 3

Seven-day-old seedlings of cucumber (Cucumis sativus L.) cv. Wisconsin were treated with 0.01, 0.1 and 0.5 mM solutions of derivatives of cinnamic acid (ferulic and p-coumaric acids) and benzoic acid (p-hydroxybenzoic and vanillic acids) as stress factors. In cucumber roots phenolics (free and glucosylated), phenol β-glucosyltransferase (E.C. 2.4.1.35) activity as well as membrane permeability were examined. The most intensive glucosylation took place in the first hour of stress duration in roots treated with 0.01 mM ferulic and p-coumaric acids and with 0.01 and 0.1 mM p-hydroxybenzoic and vanillic acids. At these concentrations a high phenol β-glucosyltransferase activity was found. The deterioration of capacity for phenolic glucosylation as well as the decrease of the phenol β-glucosyltransferase was observed at the higher concentrations. It was associated with increased membrane permeability.

Ograniczanie wyników

5 Acta Physiologiae Plantarum

1 Acta Biologica Cracoviensia. Series Botanica

5 Politycka B.

1 Gmerek J.

1 Jozwiak A.

1 Kozlowska M.

1 Kubis J.

1 Pietrowska-Borek M.

1 2011

1 2007

1 2000

1 1998

1 1997

1 1996

Induced phenylpropanoid metabolism under irradiation/allelochemical stresses

Phenolics and the activities of phenylalanine ammonia-lyase, phenol-beta-glucosyltransferase and beta-glucosidase in cucumber roots as affected by phenolic allelochemicals

Changes in free polyamine level and di- and polyamine oxidase activity in cucumber roots under allelochemical stress conditions

Peroxidase activity and lipid peroxidation in roots of cucumber seedlings influenced by derivatives of cinnamic and benzoic acids

Response of maize, pea and radish roots to allelochemical stress

Free and glucosylated phenolics, phenol beta-glucosyltransferase activity and membrane permeability in cucumber roots affected by derivatives of cinnamic and benzoic acids