Plant Sciences (IBG2), Forschungszentrum Jülich, D-52425 Jülich, Germany.
Cornell University, Ithaca, NY 14853, USA.
New Phytol. 2012 Jan;193(1):30-50. doi: 10.1111/j.1469-8137.2011.03952.x. Epub 2011 Nov 15.
We quantified the biomass allocation patterns to leaves, stems and roots in vegetative plants, and how this is influenced by the growth environment, plant size, evolutionary history and competition. Dose-response curves of allocation were constructed by means of a meta-analysis from a wide array of experimental data. They show that the fraction of whole-plant mass represented by leaves (LMF) increases most strongly with nutrients and decreases most strongly with light. Correction for size-induced allocation patterns diminishes the LMF-response to light, but makes the effect of temperature on LMF more apparent. There is a clear phylogenetic effect on allocation, as eudicots invest relatively more than monocots in leaves, as do gymnosperms compared with woody angiosperms. Plants grown at high densities show a clear increase in the stem fraction. However, in most comparisons across species groups or environmental factors, the variation in LMF is smaller than the variation in one of the other components of the growth analysis equation: the leaf area : leaf mass ratio (SLA). In competitive situations, the stem mass fraction increases to a smaller extent than the specific stem length (stem length : stem mass). Thus, we conclude that plants generally are less able to adjust allocation than to alter organ morphology.
我们量化了营养、光照、植物大小、进化历史和竞争等因素对营养生长期植物叶片、茎和根生物量分配模式的影响。我们通过对大量实验数据的元分析构建了分配的剂量反应曲线。结果表明，整株植物中叶片部分（LMF）所占的比例随养分的增加而显著增加，随光照的减少而显著减少。对大小诱导的分配模式进行校正后，降低了光照对 LMF 的影响，但使温度对 LMF 的影响更加明显。分配模式存在明显的系统发育效应，真双子叶植物比单子叶植物、裸子植物比木本被子植物在叶片上的投资相对较多。在高密度下生长的植物的茎部分明显增加。然而，在大多数跨物种组或环境因素的比较中，LMF 的变化小于生长分析方程的另一个组成部分（叶面积：叶质量比[SLA]）的变化。在竞争情况下，与特定茎长（茎长：茎质量）相比，茎质量分数的增加幅度较小。因此，我们得出结论，植物通常调整分配的能力不如改变器官形态的能力强。
