Comparison of petunia and calibrachoa in carotenoid pigmentation of corollas
| Autor: | Sanae Kishimoto, Akemi Ohmiya, Chihiro Oda-Yamamizo |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine Calibrachoa Plant Science Biology 01 natural sciences Petunia Esterase Calibrachoa hybrida 03 medical and health sciences xanthophyll esterase Ornamental plant Botany Genetics Cultivar Carotenoid chemistry.chemical_classification organic chemicals food and beverages Petunia hybrida biology.organism_classification carotenoid Terpenoid 030104 developmental biology chemistry Xanthophyll gene expression flower color Agronomy and Crop Science Research Paper 010606 plant biology & botany |
| Zdroj: | Breeding Science SC10201904120001 NARO成果DBaｰBR |
| ISSN: | 1347-3735 1344-7610 |
| Popis: | Petunia (Petunia hybrida) is an important ornamental plant with a wide range of corolla colors. Although pale-yellow-flowered cultivars, with a low amount of carotenoids in their corollas, are now available, no deep-yellow-flowered cultivars exist. To find why petunia cannot accumulate enough carotenoids to have deep-yellow flowers, we compared carotenoid profiles and expression of carotenoid metabolic genes between pale-yellow-flowered petunia and deep-yellow-flowered calibrachoa (Calibrachoa hybrida), a close relative. The carotenoid contents and the ratios of esterified xanthophylls to total xanthophylls in petunia corollas were significantly lower than those in calibrachoa, despite similar carotenoid components. A lower esterification rate of trans-xanthophylls than of cis-xanthophylls in petunia suggests that petunia xanthophyll esterase (XES) has low substrate specificity for trans-xanthophylls, which are more abundant than cis-xanthophylls in petunia corolla. The expression of genes encoding key enzymes of carotenoid biosynthesis was lower and that of a carotenoid catabolic gene was higher in petunia. XES expression was significantly lower in petunia. The results suggest that low biosynthetic activity, high cleavage activity, and low esterification activity cause low carotenoid accumulation in petunia corollas. |
| Databáze: | OpenAIRE |
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