Department of Biology, Brandeis University, Waltham, Massachusetts 02154.
Plant Physiol. 1972 Apr;49(4):607-14. doi: 10.1104/pp.49.4.607.
Chloroplasts have been isolated from 4- to 6-day-old corn (Zea mays) leaves capable of assimilating 45 micromoles CO(2) per milligram chlorophyll per hour. The effects of various factors such as inorganic phosphate, reducing agents, inhibitors, intermediates of the photosynthetic carbon reduction cycle, organic acids, and oxygen on the photosynthetic rate and on the distribution of (14)C within the products by these chloroplasts were determined. The photosynthetic carbon metabolism of the corn plastids appeared to be similar to that already observed in spinach and pea chloroplasts. It was concluded that the corn plastids can fix CO(2) at meaningful rates via the photosynthetic carbon reduction cycle of Calvin without the operation of a cycle involving the C-4 compounds, malate and aspartate.
已从 4-6 天大的玉米（Zea mays）叶片中分离出叶绿体，这些叶片每小时每毫克叶绿素可同化 45 微摩尔 CO2。研究了各种因素，如无机磷酸盐、还原剂、抑制剂、光合作用碳还原循环的中间产物、有机酸和氧气，对这些叶绿体的光合速率和（14）C 在产物中的分布的影响。玉米质体的光合碳代谢似乎与已在菠菜和豌豆叶绿体中观察到的相似。结论是，玉米质体可以通过卡尔文光合作用碳还原循环以有意义的速率固定 CO2，而无需涉及 C-4 化合物、苹果酸和天冬氨酸的循环。
