ArticlePlanta2025
Geranyl diphosphate synthase small subunit I (GPPS.SSU I) expression strongly correlates with the presence or absence of monoterpene emission from lily (Lilium spp.) flowers.
Article in Planta, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Who cites it
1 citing paper in PubMed.
- Functional Characterization ofPlants (Basel, Switzerland) · 2026Article
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7 authors.
Funding
Abstract
MAIN
conclusionWe reported the functional characterization of cDNAs encoding geranyl diphosphate synthase small subunit I (GPPS.SUU I) that determine the presence or absence of monoterpene emission from lily flowers. While monoterpene compounds are among the most important scent substances in lily flowers, their emission levels vary among lily cultivars. For example, Oriental hybrid cultivars emit sufficient monoterpenes, but Asiatic hybrid cultivars scarcely emit them. Geranyl diphosphate (GPP), a precursor of monoterpenes, is biosynthesized by GPP synthase (GPPS) in plastids. Angiosperm GPPSs are often heteromeric enzymes consisting of non-catalytic small subunits (GPPS.SSU) and catalytic large subunits (GPPS.LSU); the homomeric form of the latter functions as a geranylgeranyl diphosphate synthase (GGPPS). To determine which genes created large variations in monoterpene emission levels, we characterized Lilium hybrid GPPS.SSU I (LhGPPS.SSU I) and LhGGPPS/GPPS.LSU1, and compared their expression levels in scent and scentless lily flowers. Green fluorescent protein (GFP)-fused LhGGPPS/GPPS.LSU1 and LhGPPS.SSU I proteins were co-localized in the chloroplasts of tobacco cells, and LhGPPS.SSU I interacted physically with LhGGPPS/GPPS.LSU1 in the yeast two-hybrid system. LhGPPS.SSU I overexpression in tobacco (transient) and lily (stable) leaves promoted GPP biosynthesis. Thus, LhGPPS.SSU I interacted with LhGGPPS/GPPS.LSU1 to biosynthesize GPP. LhGPPS.SSU I expression in lily tepals occurred in Oriental but not in Asiatic hybrid cultivars, whereas LhGGPPS/GPPS.LSU1 expression occurred in both, irrespective of monoterpene emissions, indicating that LhGPPS.SSU I is a key determinant of monoterpene emissions from lily flowers. LhGPPS.SSU I was not expressed in seven wild species involved in Asiatic hybrid lily establishment but was expressed in Lilium cernuum, which can hybridize with Asiatic hybrid lilies, indicating that L. cernuum is a promising genetic resource for enhancing floral scent in Asiatic hybrids.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the Socratic graph.