Department of Horticulture and Landscape Architecture, Washington State University, Pullman, Washington 99164-6414.
Plant Physiol. 1986 Sep;82(1):307-11. doi: 10.1104/pp.82.1.307.
Developmental changes in photosynthetic gas exchange were investigated in the mannitol synthesizing plant celery (Apium graveolens L. ;Giant Pascal'). Greenhouse-grown plants had unusually high photosynthetic rates for a C(3) plant, but consistent with field productivity data reported elsewhere for this plant. In most respects, celery exhibited typical C(3) photosynthetic characteristics; light saturation occurred at 600 micromoles photons per square meter per second, with a broad temperature optimum, peaking at 26 degrees C. At 2% O(2), photosynthesis was enhanced 15 to 25% compared to rates at 21% O(2). However, celery had low CO(2) compensation points, averaging 7 to 20 microliters per liter throughout the canopy. Conventional mechanisms for concentrating CO(2) were not detectable.
研究了甘露醇合成植物芹菜（Apium graveolens L.；Giant Pascal'）中光合作用气体交换的发育变化。温室种植的植物具有不寻常的高光合速率，对于 C(3)植物而言，但与该植物在其他地方报道的田间生产力数据一致。在大多数方面，芹菜表现出典型的 C(3)光合作用特征；光饱和发生在每平方米每秒 600 微摩尔光子，具有广泛的温度最佳值，在 26°C 时达到峰值。在 2%O(2)下，与 21%O(2)下的速率相比，光合作用增强了 15%至 25%。然而，芹菜的 CO(2)补偿点较低，整个冠层平均为 7 至 20 微升/升。没有检测到集中 CO(2)的常规机制。
