植物茎
蔗糖
呼吸
碳纤维
己糖
化学
磷酸盐
植物
生物
园艺
生物化学
酶
材料科学
复合数
复合材料
作者
Keren Bindon,Frederik C. Botha
标识
DOI:10.1034/j.1399-3054.2002.1160102.x
摘要
The changes in carbon allocation to non-sucrose metabolic pathways were investigated in developing internodes of sugarcane. Radiolabelling studies were done on internode 3, 6 and 9 tissues, representing three stages of increasing maturity. Carbon partitioning into sucrose increased from 34% of total 14C uptake in internode 3, to 66% in internodes 9. In immature tissue, the protein and fibre components were the dominant competing sinks with sucrose for incoming carbon, to which 14 and 16% of carbon was allocated. Increased carbon allocation to sucrose with tissue maturity coincided with a decrease in partitioning to fibre and total respiration. Between internodes 3 and 9 carbon allocation to total respiration decreased by 9%, and to fibre by 14%. Carbon cycling between the triose- and hexose phosphate pools was evident in all internodes. More than 90% of carbon entering triose-phosphates was returned to hexose in internode 3 tissue, and this flux decreased with tissue maturity.
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