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The commercial bulbs of narcissus(Narcissus tazetta)are often excessive growth in the condition of weak sunlight and low temperature in winter hydroponics. After the treatment by PP-333, the activity of Per-oxidase was enhanced. the content of chlorophyll of leaf per unit weight was increased. Meanwhile, after PP-333 Treatment, the plant shape becomes compact and dwarf. So that the ornamental value of hydroponic narcissus was increased.
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