J Integr Plant Biol. ›› 1965, Vol. 13 ›› Issue (1): -.
• Research Articles •
Y. Z. Feng, S. C. Yu and J. H. Chang
Abstract: The effect of light intensity on Rauvolfia yunnanensis was studied under four different light conditions, namely: 1. 100% daylight (shadeless); 2.73% (27% shaded); 3. 48% (52% shaded) ; 4. 28% (72% shaded). The most suitable light intensity required for the growth of plant, both on the plant height and diameter, was varying from 28% daylight (at dry season) to 73% daylight (at foggy season) at different seasons. Under the half shaded condition (48% light intensity), the annual production of roots, leaves and stems was greater than under any other light conditions (100%, 73% or 28% light intensity). The total number of flowers was depressed markedly by shading, but the number of fruits yielded was higher under 73% light intensity. The number of embryoless seeds was as high as 96% under full light condition (100% light intensity), but decreased apparently under the shading of forest canopy. The size of leaves, fruits and seeds was varying quite a bit with different light intensities. Finally, we have to mention that the alkaloid contents in the leaves tended to increase with the decreasing of the light intensity.
Y. Z. Feng, S. C. Yu and J. H. Chang. The Effect of Light Intensity on Certain Biological Characters of Rauvolfia[J]. J Integr Plant Biol., 1965, 13(1): -.
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