Table 3 Multiple regression and path analyses of organic acids of TCA cycle
From: Analysis of organic acids of tricarboxylic acid cycle in plants using GC-MS, and system modeling
Multiple regression equation | ||||||
MA (mg/g dw) = − 4.16 + 2.28 CA (mg/g dw) + 4.99 SA (mg/g dw) – 6.01 FmA (mg/g dw) | ||||||
Multiple correlation coefficient (r) = 0.5010 (p < 0.001) | ||||||
Path analysis | ||||||
Independent variables | Direct effects (DE) on MA | Indirect effects (IE) on MA | Total effects (DE + IE) | |||
CA | SA | FmA | Total IE | |||
Citric acid (CA) | 0.5393 | 0 | − 0.0204 | − 0.0265 | − 0.0469 | 0.4924 |
Succinic acid (SA) | 0.1252 | − 0.0879 | 0 | − 0.0976 | − 0.1856 | − 0.0604 |
Fumaric acid (FmA) | − 0.1398 | 0.1024 | 0.0874 | 0 | 0.1899 | 0.0501 |