CHANGES OF CARBON AND NITROGEN NUTRITION DURING GROWTH OF GINGER
This experiment analyzed carbon nutrition, nitrogen nutrition, and the activities of amylase, invertase, and nitrate reductase in ginger (Zingiber officinale) during growth of the plant. At the beginning, starch and dry substances of seed-ginger decreased, but were gradually replaced during the vigorous growth stage. Soluble sugar always increased. Starch and soluble sugar contents of fresh rhizome increased with growth. The amylase activities of seed-ginger increased sharply at seedling stage, but decreased rapidly during vigorous growth. The invertase activity of fresh rhizomes increased at early stage and was then maintained at the higher level. Neither the invertase activity of seed-ginger nor the amylase activity of rhizomes changed much. The changing trend in nitrate reductase activities in ginger leaves was a single episode with the highest value during the vigorous growth stage. Total nitrogen content of seed-ginger and rhizomes gradually decreased with growth, but the non-protein nitrogen content of seed-ginger only increased at the early stage, while the non-protein nitrogen content of fresh rhizomes decreased rapidly and the protein nitrogen content stabilized.
Xu, K., Kang, L.M., Zheng, Y.Q. and Su, H. (2008). CHANGES OF CARBON AND NITROGEN NUTRITION DURING GROWTH OF GINGER. Acta Hortic. 765, 263-268
amylase, invertase, nitrate reductase, Zingiber officinale