Fig 1.
Changes in moisture content and germination of Phoebe chekiangensis seeds during desiccation.
The quadratic function regression model was used for the relationship between drying time and moisture content (A), Logistic regression model was used for the relationship between moisture content and germination percentage (B). The influence of desiccation on germination percentage (C) and germination index (D) was analyzed by one-way ANOVA. Different lowercase letters represent significant differences at the p < 0.05 level according to the Duncan test. Data represent mean ± SE.
Fig 2.
Effects of different moisture contents on starch (A), soluble sugar (B), and sugar components (C and D) during seed desiccation. Data represent mean ± SE.
Fig 3.
Effects of different moisture contents on (A) non-reducing sugar (NRS), (B) reducing sugar (RS), and (C) reducing sugar/non-reducing sugar (RS/NRS) during seed desiccation. The non-reducing sugar content refers to the combined amount of sucrose, trehalose, and inositol, whereas the reducing sugar content refers to the combined amount of fructose, glucose, galactose, and arabinose. RS/NRS refers to the ratio of (glucose + fructose + arabinose + galactose) to (sucrose + trehalose + inositol). One-way ANOVA analysis was performed on the data. Different lowercase letters represent significant differences at the p < 0.05 level according to the Duncan test. Data represent mean ± SE.
Fig 4.
Effects of desiccation on relative electrical conductivity (A) and MDA (B). One-way ANOVA analysis was performed on the data. Different lowercase letters represent significant differences at the p < 0.05 level according to the Duncan test. Data represent mean ± SE.
Fig 5.
Correlation analysis between physiological and biochemical indexes during seed desiccation.
The size of the circles in the diagram represents the level of correlation (r), with bigger circles indicating a higher correlation. “*” indicate significant differences at p < 0.05. MC: Moisture content, GP: Germination percentage, GI: Germination index, ST: Starch, SS: Soluble sugar, NRS: The combined amount of sucrose, trehalose, and inositol, RS: The combined amount of fructose, glucose, galactose, and arabinose, RS/NRS: The ratio of the two above, RC: Relative electrical conductivity, MDA: Malondialdehyde.
Fig 6.
Principal component analysis between physiological and biochemical indexes during seed desiccation.
GP: Germination percentage, GI: Germination index, ST: Starch, SS: Soluble sugar, NRS: The combined amount of sucrose, trehalose, and inositol, RS: The combined amount of fructose, glucose, galactose, and arabinose, RS/NRS: The ratio of the two above, RC: Relative electrical conductivity, MDA: Malondialdehyde.