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KMID : 0903619920330010054
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Journal of the Korean Society for Horticultural Science
1992 Volume.33 No. 1 p.54 ~ p.61
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Effects of Different levels of Light , Gibberellin , Nitrogen , Potassium and Phosphate Applications on Leaf - Yellowing of Lonicera japonica var . aureo - reticulata
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Abstract
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Effects of two different light levels and foliar-sprayed gibberellin (GA₃) on leaf-yellowing of Lonicera japonica var. aureo-reticulata at varied levels of either nitrogen or phosphate and potassium were assessed by measuring total chlorophyll, nitrogen, and carbohydrate contents, dry weight, and plant height.
The results were summarized as follows:
1. Leaf-variegation of the golden appearance was more striking in the light than in the shade.
2. Leaf-variegation of the golden appearance was more with low level of nitrogen application in the light. Potassium and phosphate applications under the same light intensity did not change the extent of leaf variegation.
3. Unlike in the shade, GA₃ manifested a greater yellow-veining appearance in the light.
4. Total chlorophyll content decreased with increasing light intensity. At the same light levels, GA₃ applications reduced total chlorophyll content, and similiar results were shown for the total nitrogen content. Total carbohydrate content increased more in the light than in the shade. Dry matter was more in the light than in the shade. Plant height showed no difference between in the light and the shade.
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