[Effects of light on morphological plasticity and biomass allocation of Momordica charantia]

The growth dynamics, morphological characteristics and biomass allocation of climbing plant Momordica charantia were studied under shading. The results showed that the growth of Momordica charantia had a significant difference under different levels of shading. Under weak light, the plants decreased the chance to increase their modular numbers and accumulate biomass, and had fewer shoots, thinner laminas, longer and thinner petioles, and more slender stems. The plants showed a stronger morphological plasticity under weak light than under strong light, and had a stronger morphological plasticity at early growth stage than at later growth stage. The laminas and stem biomass allocation increased, while branch biomass allocation decreased with decreasing light illumination. Light intensity had little effect on biomass allocation to shoot stems. External support is not necessary for the growth of Momordica charantia under strong light.