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Fig. 8 | BMC Plant Biology

Fig. 8

From: Proanthocyanidin accumulation and transcriptional responses in the seed coat of cranberry beans (Phaseolus vulgaris L.) with different susceptibility to postharvest darkening

Fig. 8

Relationship between proanthocyanidin levels and gene expression in cranberry bean seed coats. a Scree plot of the percentage of total variance explained by each principal component (PC). b Correlation matrix of the relationship between seed coat total proanthocyanidin levels and PCs accounting for 95% of the total variance. For each comparison, the strength of the correlation is represented by the corresponding correlation coefficient value. c Score plot of PC2 versus PC3. Biological replicates of darkening and non-darkening RIL seed coat are represented by red and green symbols, respectively. Dashed circles within the score plot are used to identify grouping of darkening and non-darkening RIL seed coat transcriptomes at each developmental stage. d Correlation loading plot analysis of PC2 versus PC3. Scatter dots represent the contribution of each of the 1336 differentially expressed genes. Genes with absolute coefficients greater than 0.1 for PC2 and/or PC3 were labelled with their corresponding gene annotation or accession numbers. Pv, Phaseolus vulgaris; PvANR1, ANTHOCYANIDIN REDUCTASE 1 (Phvul.002G218700); PvAS, ASPARAGINE SYNTHETASE (Phvul.006G069300); PvDFR1, DIHYDROFLAVONOL 4-REDUCTASE 1 (Phvul.001G012700); PvENOD93, EARLY NODULIN 93 (Phvul.003G162200); PvF3H1, FLAVANONE 3-HYDROXYLASE 1 (Phvul.003G261900); PvGARP, GIBBERELLIC ACID REGULATED PROTEIN (Phvul.001G006300); PvIFR, ISOFLAVONE REDUCTASE (Phvul.009G059000); PvLTP, LIPID TRANSFER PROTEIN (Phvul.008G137100); PvPCD, PROGRAMMED CELL DEATH PROTEIN (Phvul.004G174800); PvSCP, SERINE CARBOXYPEPTIDASE (Phvul.011G010600)

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