What question did this study set out to answer?

To identify and characterize the auxin-responsive plant gene FQR1 and determine the enzymatic function of its encoded protein.

February 1, 2002PLANT PHYSIOLOGYOpen Access

FQR1, a Novel Primary Auxin-Response Gene, Encodes a Flavin Mononucleotide-Binding Quinone Reductase

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Authors

MLMarta LaskowskiMichigan Technological University KDKate DreherUniversité Claude Bernard Lyon 1 MGMary GehringHoward Hughes Medical Institute

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Implication

Experimental study demonstrates rapid auxin-induced expression and quinone reductase activity of FQR1 in plants, suggesting a protective role against hormone-induced oxidative stress.

Key Points

To identify and characterize the auxin-responsive plant gene FQR1 and determine the enzymatic function of its encoded protein.
Measured FQR1 mRNA induction kinetics following indole-3-acetic acid treatment in the presence and absence of the protein synthesis inhibitor cycloheximide.
Purified recombinant His-tagged FQR1 expressed in Escherichia coli to evaluate electron transfer from NADH/NADPH and in vitro quinone reductase activity.
Generated transgenic plants overexpressing FQR1 to assess in vivo protein accumulation and enzymatic quinone reductase activity.
FQR1 mRNA accumulation began within 10 minutes of indole-3-acetic acid exposure and peaked at an approximately 10-fold induction at 30 minutes, persisting despite cycloheximide treatment.
Recombinant FQR1 catalyzed electron transfer from NADH and NADPH to substrates in vitro, confirming quinone reductase activity.
Overexpression of FQR1 in transgenic plants increased FQR1 protein levels and quinone reductase activity in vivo.

Cite This Study

Laskowski et al. (2002) studied this question.

synapsesocial.com/papers/6a6f3485439bab0cabc2b90f https://doi.org/10.1104/pp.010581

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Implication

Experimental study demonstrates rapid auxin-induced expression and quinone reductase activity of FQR1 in plants, suggesting a protective role against hormone-induced oxidative stress.

FQR1, a Novel Primary Auxin-Response Gene, Encodes a Flavin Mononucleotide-Binding Quinone Reductase

Discussion

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Implication

Key Points

Cite This Study

FQR1, a Novel Primary Auxin-Response Gene, Encodes a Flavin Mononucleotide-Binding Quinone Reductase

Discussion

Member takes

Implication

Key Points

Cite This Study

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