Project description:BackgroundPolyploids in citrus are generally used to improve crop varieties. Changshan Huyou (Citrus changshan-huyou) is a native citrus species in China that is highly adaptable and has pharmaceutical value. However, the influence in Changshan Huyou following polyploidization remains unclear. Here we evaluated the adult tetraploid scions of Changshan Huyou with contemporary diploid scions as the control in the phenotypic variations, metabolic alterations of fruits and associated transcriptomic changes.ResultThe tetraploid scions had rounder and thicker leaves, larger floral organs and fruits, and satisfactory viability of pollen grains and ovules. The tetraploid fruits accumulated lower levels of soluble solids but similar levels of organic acids. Metabolic profiling of three tissues of fruits revealed that most of 2064 differentially accumulated metabolites (DAMs), including flavonoids, lignans, and coumarins, were downregulated. In contrast, the upregulated DAMs mainly included alkaloids (clausine K and 2-(1-pentenyl)quinoline), amino acids (L-asparagine and L-ornithine), and terpenoids (deacetylnomilin and evodol) in tetraploid peels, as well as, flavonoids (neohesperidin and quercetin-5-O-β-D-glucoside) and organic acids (2-methylsuccinic acid and dimethylmalonic acid) in juice sacs. The upregulated genes were associated with phenylpropanoid biosynthesis, secondary metabolite biosynthesis, and the biosynthesis of various alkaloid pathways. Pearson Correlation Analysis showed that the upregulated genes encoding PEROXIDASE and CYTOCHROME P450 (CYP450) were closely related to the higher accumulation of amino acids and alkaloids in tetraploid peels, and up-regulated neohesperidin and quercetin glucoside were positively associated with FERULATE-5-HYDROXYLASE (F5H), CYP450 81Q32, FLAVONOID 3'-MONOOXYGENASE (F3'H), 4-COUMARATE-CoA LIGASE 1 (4CL1), and UDP-GLUCOSE FLAVONOID 3-O-GLUCOSYLTRANSFERASE (UFOG), as well as, some transcription factors in tetraploid juice sacs.ConclusionThe tetraploid Changshan Huyou investigated here may be used in triploids breeding to produce seedless citrus, and for fruit processing on pharmaceutical purpose due to the alteration of metabolites following polyploidization.
| S-EPMC11889857 | biostudies-literature
Project description:Citrus x changshan-huyou genome sequencing
| PRJNA1104576 | ENA
Project description:Genome sequencing and assembly of Citrus changshan-huyou
Project description:Citrus fruits possess a distinctive aroma and flavor, with Citrus aurantium Changshan-huyou (CACH) standing out due to their considerable edible and medicinal value. However, the volatile components (VOCs) in the CACH pericarp (CP) remain underexplored. In this study, gas chromatography-mass spectrometry (GC-MS) was utilized to qualitatively analyze VOCs in 27 CP samples across different growth stages. A total of 544 VOCs were identified, including 91 terpenoids. The types, quantities and distributions of VOCs were conducted. Detailed discussions on the major terpenoids in CP were also presented. A metabolomics approach combining multivariate statistical analysis with univariate analysis was employed for screening the differential metabolites. The study provides comprehensive insights into the VOCs in CP and citrus plants. Moreover, it delivers the first in-depth analysis of differential metabolites in CP throughout the entire CACH growth and development process, laying a foundation for ongoing research and development of the VOCs in CP.
| S-EPMC11315122 | biostudies-literature
Project description:Morphological and metabolic changes in Changshan Huyou (Citrus aurantium) following natural tetraploidization