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Arabidopsis NPL1: A Phototropin Homolog Controlling the Chloroplast High-Light Avoidance Response

Takatoshi Kagawa, Tatsuya Sakai, Noriyuki Suetsugu, Kazusato Oikawa, Sumie Ishiguro, Tomohiko Kato, Satoshi Tabata, Kiyotaka Okada, Masamitsu Wada

Open publisher page 655 citations

Abstract

Chloroplasts relocate their positions in a cell in response to the intensity of incident light, moving to the side wall of the cell to avoid strong light, but gathering at the front face under weak light to maximize light interception. Here, Arabidopsis thaliana mutants defective in the avoidance response were isolated, and the mutated gene was identified as NPL1 (NPH-like 1), a homolog of NPH1 (nonphototropic hypocotyl 1), a blue light receptor used in phototropism. Hence, NPL1 is likely a blue light receptor regulating the avoidance response under strong light.

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What this paper is about

Chloroplasts relocate their positions in a cell in response to the intensity of incident light, moving to the side wall of the cell to avoid strong light, but gathering at the front face under weak light to maximize light interception. Here, Arabidopsis thaliana mutants defective in the avoidance response were isolated, and the mutated gene was identified as NPL1 (NPH-like 1), a homolog of NPH1 (nonphototropic hypocotyl 1), a blue light receptor used in phototropism. Hence, NPL1 is likely a blue light receptor regulating the avoidance response under strong light.

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OpenAlex reports 655 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

Chloroplasts relocate their positions in a cell in response to the intensity of incident light, moving to the side wall of the cell to avoid strong light, but gathering at the front face under weak light to maximize light interception. Here, Arabidopsis thaliana mutants defective in the avoidance response were isolated, and the mutated gene was identified as NPL1 (NPH-like 1), a homolog of NPH1 (nonphototropic hypocotyl 1), a blue light receptor used in phototropism. Hence, NPL1 is likely a blue light receptor regulating the avoidance response under strong light.

Key concepts: Phototropism, Phototropin, Arabidopsis, Blue light, Mutant, Chloroplast, Arabidopsis thaliana, Phytochrome

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