Occurrence of brassinosteroids in non-flowering land plants, liverwort, moss, lycophyte and fern.
Phytochemistry
; 136: 46-55, 2017 Apr.
Article
em En
| MEDLINE
| ID: mdl-28057327
ABSTRACT
Endogenous brassinosteroids (BRs) in non-flowering land plants were analyzed. BRs were found in a liverwort (Marchantia polymorpha), a moss (Physcomitrella patens), lycophytes (Selaginella moellendorffii and S. uncinata) and 13 fern species. A biologically active BR, castasterone (CS), was identified in most of these non-flowering plants but another biologically active BR, brassinolide, was not. It may be distinctive that levels of CS in non-flowering plants were orders of magnitude lower than those in flowering plants. 22-Hydroxycampesterol and its metabolites were identified in most of the non-flowering plants suggesting that the biosynthesis of BRs via 22-hydroxylation of campesterol occurs as in flowering plants. Phylogenetic analyses indicated that M. polymorpha, P. patens and S. moellendorffii have cytochrome P450s in the CYP85 clans which harbors BR biosynthesis enzymes, although the P450 profiles are simpler as compared with Arabidopsis and rice. Furthermore, these basal land plants were found to have multiple P450s in the CYP72 clan which harbors enzymes to catabolize BRs. These findings indicate that green plants were able to synthesize and inactivate BRs from the land-transition stage.
Palavras-chave
24-epi-Castasterone (PubChem CID: 11812633); 28-homo-Castasterone (PubChem CID: 5487654); 3-epi-6-Deoxocathasterone (PubChem CID: 45480560); 6-Deoxocastasterone (PubChem CID: 13870433); 6-Deoxocathasterone (PubChem CID: 16061344); Biosynthesis and catabolism; Brassinosteroids; CYP72; CYP85; Campesterol (PubChem CID: 173183); Cytochrome P450; Evolution; Ferns; Funariaceae; Marchantia polymorpha; Marchantiaceae; Oryza sativa; Physcomitrella patens; Poaceae; Selaginella moellendorffii and S. uncinata; Selaginellaceae; Zea mays; castasterone (PubChem CID: 133534)
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Cycadopsida
/
Brassinosteroides
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article