Effects of Glyphosate on Metabolism of Phenolic Compounds. III. Phenylalanine Ammonia-Lyase Activity, Free Amino Acids, Soluble Protein and Hydroxyphenolic Compounds in Axes of Dark-Grown Soybeans

ABSTRACT: In the present investigation, Maize seeds of hybrid NK 6240 and 900M Gold were exposed to UV-B (280-320 nm) for periods of 40 and 60 minutes and compared with the control without exposer to UV-B. The biochemical changes associated with UV-B induced resistance were investigated by determination of proline concentration, total soluble sugars, total soluble protein, malondialdehyde content and free amino acids from leaves and roots. Also comparison for germination percentage between control and treated seeds was carried along with biochemical traits. Analysis of variance explains both the hybrids were significantly different in germination percentage, total soluble sugars, proline and free amino acids. Whereas both treatments showed high significant variation for all the studied traits, but genotype × treatment interaction was non-significant for all the traits. 40 minutes UV-B treated seeds showed reduced total soluble sugars and increased malondialdehyde, proline and total soluble protein content. In 60 minutes UV-B treatment, decrease in free amino acids, proline, percentage of germination, and total soluble protein and increase in total soluble sugars was observed.

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Modification of cadmium toxicity in pea seedlings by kinetin

Plant Soil and Environment ◽

10.17221/2228-pse ◽

2008 ◽

Vol 53 (No. 3) ◽

pp. 129-135 ◽

Cited By ~ 37

Author(s):

A.M.A. Al-Hakimi

Keyword(s):

Amino Acids ◽

Growth Rate ◽

Soluble Protein ◽

Free Amino Acids ◽

Free Amino ◽

Foliar Application ◽

Cadmium Toxicity ◽

Soluble Sugars ◽

Favorable Effect ◽

Cadmium Treatment

The effect of foliar application of kinetin on the growth and some physiological processes of pea plants growing in soil supplemented with 25 or 50µM Cd were studied. Cadmium treatment inhibited the growth rate, chlorophyll (Chl) content, net photosynthesis (PN), content of soluble sugars and free amino acids of either shoots or roots. The application of kinetin (kin) enhanced the growth rate, Chl content, PN, soluble sugars and free amino acids content of shoots and roots; dark respiration rate (RD), contents of soluble protein and proline were increased by cadmium treatment. The addition of kinetin to Cd-stressed plant reduced RD, soluble protein and proline content. Considerable variations in the content of Na+, K+, Ca2+ and Mg2+ were induced by Cd-treatments. Foliar application of kinetin exhibited a favorable effect on the accumulation of some ions and antagonized or ameliorated the inhibitory effect of Cd stress on some others.

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Influence of amino acids, organic solvents and surfactants for phenylalanine ammonia lyase activity in recombinant Escherichia coli

Letters in Applied Microbiology ◽

10.1111/j.1472-765x.2008.02364.x ◽

2008 ◽

Vol 46 (6) ◽

pp. 631-635 ◽

Cited By ~ 13

Author(s):

J.D. Cui ◽

S.R. Jia ◽

A.Y. Sun

Keyword(s):

Escherichia Coli ◽

Amino Acids ◽

Organic Solvents ◽

Phenylalanine Ammonia Lyase ◽

Recombinant Escherichia Coli ◽

Lyase Activity ◽

Phenylalanine Ammonia Lyase Activity

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Effects of glyphosate on metabolism of phenolic compounds I. Induction of phenylalanine ammonia-lyase activity in dark-grown maize roots

Plant Science Letters ◽

10.1016/0304-4211(78)90002-0 ◽

1978 ◽

Vol 11 (3-4) ◽

pp. 185-190 ◽

Cited By ~ 40

Author(s):

Stephen O. Duke ◽

Robert E. Hoagland

Keyword(s):

Phenolic Compounds ◽

Phenylalanine Ammonia Lyase ◽

Maize Roots ◽

Lyase Activity ◽

Phenylalanine Ammonia Lyase Activity

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Comparison of Isomers of Fluorophenylalanine as Inhibitors of Ion Transport Across Barley Roots

Functional Plant Biology ◽

10.1071/pp9750659 ◽

1975 ◽

Vol 2 (4) ◽

pp. 659 ◽

Cited By ~ 2

Author(s):

RA Wildes ◽

MG Pitman ◽

N Schaefer

Keyword(s):

Phenolic Compounds ◽

Ion Transport ◽

Phenylalanine Ammonia Lyase ◽

Cl Transport ◽

Lyase Activity ◽

Phenylalanine Ammonia Lyase Activity

Earlier reports of inhibition of Cl- transport across the root to the xylem by p-fluorophenylalanine (p-FPA) were used to support the need for continual production of a protein used as a carrier. It is now shown that o-FPA and m-FPA are also effective as inhibitors of transport, ruling out the possibility that p-FPA was acting by inhibition of phenylalanine ammonia-lyase activity and so changing endogenous concentration of phenolic compounds.

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