Characterization of carotenoid pigments and their biosynthesis in two yellow flowered lines of Sandersonia aurantiaca (Hook) |
| |
Authors: | Karen M Nielsen David H Lewis Ed R Morgan |
| |
Institution: | (1) New Zealand Institute for Crop & Food Research, Fitzherbert Science Centre, Batchelor Rd, Private Bag 11 600, Palmerston North, New Zealand |
| |
Abstract: | The basis of the novel cream/yellow flower color found in two Sandersonia aurantiaca lines was examined as part of a project to develop new colors for this cut flower crop in New Zealand. The original color,
bright orange, is due to the accumulation of the carotenoid pigments zeaxanthin and β-cryptoxanthin. The cream/yellow lines
have much lower levels of total carotenoid pigments (17% and 21%) in their tepal tissue compared to the wild type progenitor.
Microscopic analysis of epidermal cells showed alteration in the pigment cluster bodies of tepal tissue of the cream/yellow
lines compared to the orange wild type. HPLC analysis of the pigments showed that one cream/yellow line (Y-H) produced the
same pigment profile as the wild type (zeaxanthin and β-cryptoxanthin). In comparison, the other cream/yellow line (Y-S) produced
the carotenoid profile normally found in green vegetative tissue (β-carotene and lutein). Analysis of carotenoid biosynthetic
gene expression in Sandersonia indicated that the cream/yellow Y-H line showed expression patterns similar to the wild type, and gene expression in the
Y-S line is decreased relative to the wild type and the Y-H line.
This revised version was published online in July 2006 with corrections to the Cover Date. |
| |
Keywords: | β -carotene hydroxylase carotenoid flower color pigments phytoene desaturase Sandersonia |
本文献已被 SpringerLink 等数据库收录! |