Regulation of 5-aminolevulinic acid (ALA) synthesis in developing chloroplasts. II. Regulation of ALA-synthesizing capacity by phytochrome

When dark-grown cucumber (Cucumis sativus L.) seedlings previously exposed to white light for 20 hours were returned to darkness, the ability of isolated chloroplasts to synthesize 5-aminolevulinic acid dropped by approximately 70% within 1 hour. The seedlings were then exposed to light, and the syn...

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