完整叶片中依赖硝酸盐的氧气释放
Nitrate-dependent o(2) evolution in intact leaves.
作者信息
de la Torre A, Delgado B, Lara C
机构信息
Departamento de Biología Vegetal y Ecología, Universidad de Sevilla-CSIC, Apdo. 1095, 41080-Sevilla, Spain.
出版信息
Plant Physiol. 1991 Jul;96(3):898-901. doi: 10.1104/pp.96.3.898.
Abstract
Evolution of O(2) by illuminated intact detached leaves from barley (Hordeum vulgare L. cv Athos) and pea (Pisum sativum L. cv Lincoln) in a CO(2)-saturating atmosphere was enhanced when KNO(3) (1-2.5 millimolar) had been previously supplied through the transpiration stream. The extra O(2) evolution observed after feeding KNO(3) increased with the light intensity, being maximal at near saturating photon flux densities and resulting in no changes in the initial slope of the O(2)versus light-intensity curve. No stimulation of O(2) evolution was otherwise observed after feeding KCl or NH(4)Cl. The data indicate that nitrate assimilation uses photosynthetically generated reductant and stimulates the rate of non-cyclic electron flow by acting as a second electron-accepting assimilatory process in addition to CO(2) fixation.
摘要
在二氧化碳饱和的大气中，当通过蒸腾流预先供应1-2.5毫摩尔的硝酸钾时，大麦（Hordeum vulgare L. cv Athos）和豌豆（Pisum sativum L. cv Lincoln）完整离体叶片在光照下的氧气释放量增加。在供应硝酸钾后观察到的额外氧气释放量随光照强度增加，在接近饱和光子通量密度时达到最大值，并且氧气与光照强度曲线的初始斜率没有变化。在供应氯化钾或氯化铵后，未观察到对氧气释放的刺激作用。数据表明，硝酸盐同化利用光合产生的还原剂，并通过作为除二氧化碳固定之外的第二个电子接受同化过程来刺激非循环电子流的速率。
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本文引用的文献
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