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The key laboratory of horticulture plant biology of MOE, college of horticulture &forestry, Huazhong Agricultural University,China produces about 40％ of the horticulture production of the world.Horticutlure constitutes more than 45％ of the whole plant industry value in this country.During the past 30 years, horticulture has kept increasing both in acreage and production.Also, the horticulture category has been the important item for keeping the international trade balance during the past decade.