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Photosynthetic character and nitrate content of Chinese Kale (Brassica oleracea L.) with various leaf colors
The genotypic and environmental effects on photosynthetic rate and nitrate content were investigated on Chinese Kale (Brassica oleracea L.). Nine varieties of Brassica oleracea with differential leaf color from dark-green to light-green were cultured under two light intensities in different seasons. It was concluded that the genotypes with dark-green leaf showed higher photosynthetic rate. In non-stomatal factor, more leaf chlorophyll content、Fm (maximal chlorophyll fluorescence)、Fv (variable chlorophyll fluorescence) and soluble protein content were found. Besides, more thick leaves and lower root/stem ratio resulted increased photosynthetic rate of the dark-green genotypes. On the other hand, energy from photosynthesis was increased by photosynthetic products. The genotypes with dark-green leafshowed higher photosynthetic, so their nitrate content were lower. Although light energy conversion efficiency increased under lower light intensity, decreased soluble protein content, leaf conductance and thickness were found in Brassica oleracea and lead to decreased photosynthetic rate. Nitrate content were also different among seasons, light intensities and harvesting time.
|Appears in Collections:||生命科學系所|
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