Science. 1976 Oct 15;194(4262):322-4. doi: 10.1126/science.194.4262.322.
Camissonia claviformis, a winter annual of Death Valley, California, that fixes carbon dioxide by the C(3) mechanism, has an in situ photosynthetic rate at midday in spring of nearly 6 nanomoles of carbon dioxide per square centimeter per second-an exceptionally high rate. Camissonia fixes absorbed noon sunlight in the 400- to 700-nanometer region into chemical energy with an efficiency of 8.5 percent, which is 80 percent of that theoretically possible for intact leaves. This performance is primarily due to an unusual capacity to utilize high irradiances. Factors associated with this include a high stomatal conductance to carbon dioxide and high levels of soluble protein and ribulose-1,5-diphosphate carboxylase.
加利福尼亚死亡谷的一种一年生植物箭叶獐牙菜（Camissonia claviformis）通过 C（3）机制固定二氧化碳，其在春季中午的原地光合作用速率接近每平方厘米每秒 6 纳摩尔二氧化碳——这是一个非常高的速率。箭叶獐牙菜将中午吸收的 400-700 纳米范围内的阳光以 8.5%的效率转化为化学能，这是完整叶片理论上可能达到的效率的 80%。这种性能主要归因于其利用高光强的非凡能力。与这种能力相关的因素包括高的二氧化碳气孔导度以及高浓度的可溶性蛋白和核酮糖-1,5-二磷酸羧化酶。
