Sucrose suppression of chlorophyll synthesis in carrot callus cultures

✍ Scribed by J. Edelman; A. D. Hanson

• Book ID: 104749301
• Publisher: Springer-Verlag
• Year: 1971
• Tongue: English
• Weight: 592 KB
• Volume: 98
• Category: Article
• ISSN: 0032-0935
• DOI: 10.1007/bf00385347

✦ Synopsis

Substrate levels of sucrose were shown to reduce chlorophyll synthesis in carrot tissue culture strain CRT1 but not in strain CLOT2. In CRT1 the effect was shown to be a suppression of greening specifically by sucrose rather than a reducing sugar requirement for chlorophyll synthesis. In CRT1 sucrose caused both a reduction in chloroplast nmnbers per cell and a suppression of lamellar development in plastids. This effect on chloroplast structure was consistent with the observed reduced photosynthetic efficiency (micromoles CO 2 per hour per mg chlorophyll) of CRT1 calluses grown on sucrose.