In Petunia x hybrida cv. 'Mitchell Diploid' floral fragrance is comprised of 13 volatile benzenoids/phenylpropanoids derived from the aromatic amino acid phenylalanine. Several genes involved in the direct synthesis of individual floral volatile benzenoid/phenylpropanoid (FVBP) compounds, i.e. at the end of the pathway, have been isolated and characterized in petunia through reverse genetic and...

Biosynthesis of benzoic acid from Phe requires shortening of the side chain by two carbons, which can occur via the β-oxidative or nonoxidative pathways. The first step in the β-oxidative pathway is cinnamoyl-CoA formation, likely catalyzed by a member of the 4-coumarate:CoA ligase (4CL) family that converts a range of trans-cinnamic acid derivatives into the corresponding CoA thioesters. Using...

A number of cytosines are altered to be recognized as uridines in transcripts of the NADH-dehydrogenase subunit 3 (nad3) gene in the mitochondria of the higher plant Petunia hybrida. Here we show that the extent of editing for three of the edit sites, all of which change the encoded amino acid, varies between different Petunia lines. Genetic analysis indicates that a single nuclear gene is resp...

Abstract Mineral nutrients are necessary for the growth and development of plants. Previous studies have concentrated mainly on silicon-accumulating plants, while less work has been conducted non-accumulating plants such as Petunia × atkinsiana D. Don. In this study, we investigated responses morphological (plant height, root length, fresh dry weight, no. flowers) biochemical (proline, malondia...

in order to assess drought tolerance of mycorrhizal petunia plants (petunia hybrida cv. mix), a greenhouse experiment was carried out with two different mycorrhizae species (glomus mosseae and glomus intraradices) applied singly or in combination at two phosphorous (p) levels (0 and 100 mg kg-1 dry soil) and three irrigation regimes (100% field capacity (fc) as control, 75% fc producing moderat...

Petunia flower petals emit large amounts of isoeugenol, which has been shown to be synthesized by isoeugenol synthase (PhIGS1) from an ester of coniferyl alcohol, hypothesized to be coniferyl acetate. This paper describes the identification and characterization of a novel petunia gene encoding an enzyme belonging to the BAHD acyltransferase family whose expression correlates with isoeugenol bio...