Light-inducible pigmentation inPortulacacallus; selection of a high betalain producing cell line

✍ Scribed by Yuji Kishima; Katsuhiro Nozaki; Ryo Akashi; Taiji Adachi

• Book ID: 104658398
• Publisher: Springer
• Year: 1991
• Tongue: English
• Weight: 861 KB
• Volume: 10
• Category: Article
• ISSN: 0721-7714
• DOI: 10.1007/bf00193147

✦ Synopsis

We have established a unique betalaln pigmentation system in callus cultures that originated from seedlings of Portulaca sp. 'Jewel' Within three different 'Jewel' lines examined, one line (JR)

was clearly superior with regard to callus growth rate and pigment formation. Furthermore, after ten cycles of selection of deeply colored callus patches, the selected clones contained on an average four times the amount of betalain as compared to the non-selected mother line.

The colorization was induced by light, but disappeared in the dark. Pigment synthesis was detectable within 30 h after irradiation and showed positive correlation with irradiation periods.