Department of Biology, University of Victoria, Victoria, B.C., Canada, V8W 2Y2.
Plant Physiol. 1986 May;81(1):21-5. doi: 10.1104/pp.81.1.21.
Roots of white spruce seedlings (Picea glauca [Moench] Voss) undergo respiratory changes during the year that are related to changing metabolic requirements. An alternative pathway is always present, functions during most of the year, and operates maximally during periods of root and shoot growth. Although some differences in respiration and the apportioning of respiration can be correlated to root morphology, the environment and the stage of shoot development are also important controls. Differences in respiration related to root morphology are not manifest in mitochondrial structure, but overall rates were found to correlate with the number of mitochondria present. Root respiration in seedlings grown under root growth capacity conditions reflects root and shoot growth at that time rather than root growth capacity.
白冷杉（Picea glauca [Moench] Voss）幼苗的根系在一年中会发生与代谢需求变化相关的呼吸变化。替代途径始终存在，在一年中的大部分时间内发挥作用，并在根系和芽生长期间达到最大值。尽管呼吸和呼吸分配的某些差异可以与根系形态相关，但环境和芽发育阶段也是重要的控制因素。与根系形态相关的呼吸差异在线粒体结构中并不明显，但总的来说，呼吸速率与存在的线粒体数量相关。在根系生长能力条件下生长的幼苗的根系呼吸反映了当时的根系和芽的生长，而不是根系生长能力。
