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Effects of Culture Media and Light Intensity on in vitro Growth of Oncidium under CO_2 Enrichment Condition

Forestry Studies in China 2003年第3期5卷 28-32页

作者： HeSonglin PanHuitang yangqiusheng KongDezheng ZhangQixiang MichioTanaka CollegeofForestryandHorticulture HenanAgriculturalUniversityZhengzhou450002P.R.China CollegeofLandscapeArchitecture BeijingForestryUniversityBeijing100083P.R.China FacultyofAgriculture KagawaUniversityMiKi-choKagawa761-0795Japan

The effects of culture media and light intensity on in vitro growth of Oncidium 慉loha Iwanga were investigated under CO2 enrichment condition. Height, fresh and dry weight of the Oncidium seedlings were measured, and the leaf number per plant, shoot number per plant, leaf width and leaf chlorophyll content were also investigated. The results were as follows: 1) The seedling height, fresh and dry weight, leaf number per plant, leaf width and leaf chlorophyll content of the shoots growing on MS complete culture medium were higher than those on 1/2MS, VW and 1/2VW media. The root number per plant and ratio of dry matter of the seedlings cultured on 1/2MS and 1/2VW media were higher than those on MS and VW; 2) The seedling height, fresh weight, dry weight, dry matter ratio and leaf chlorophyll content, leaf length, leaf width, root length, leaf number per plant, root number per plant of seedlings of Oncidium growing under 4 500 lx and 1 700 lx were higher than those under 750 lx. However, there was no significant difference in those growth parameters mentioned above while dealing with 4 500 lx and 1 700 lx except for the seedling height. Nevertheless, the leaf color of plants under 4 500 lx was lighter and the leaves of the lower parts became yellowish in comparison with those growing under 1 700 lx.

关键词： CO2 enrichment culture medium light intensity in vitro Oncidium

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