Mooney H A, Fichtner K, Schulze E-D
Lehrstuhl für Pflanzenökologie, Universität Bayreuth, Postfach 101251, 8580, Bayreuth, Germany.
Oecologia. 1995 Sep;104(1):17-23. doi: 10.1007/BF00365557.
Growth, photosynthesis, and storage of nitrogen (N) and total non-structural carbohydrates (TNC) of a perennial wild type and an annual cultivar of lima bean (Phaseolus lunatus) were examined at different light intensities and N supplies. Relative growth rate and photosynthesis increased with light and N availability. N limitation enhanced biomass allocation into root rather than into shoot, while light limitation enhanced growth of leaf area. The TNC concentrations increased with light intensity and thus with photosynthesis, while the concentrations of organic N and nitrate decreased. Increasing N supply had the opposite effect. Therefore, TNC and organic N concentrations were negatively correlated (r=-0.90). Pool size of N or TNC increased with N and light availability when either resource was non-limiting, but increased little or remained constant when either resource was limiting. Storage reached a minimum when both resources were supplied at an equal rate.
研究了不同光照强度和氮素供应条件下，多年生野生型和一年生栽培利马豆（菜豆属）的生长、光合作用以及氮（N）和总非结构性碳水化合物（TNC）的储存情况。相对生长速率和光合作用随光照和氮素有效性的增加而提高。氮素限制使生物量分配到根部而非地上部分，而光照限制则促进叶面积的生长。TNC浓度随光照强度增加，从而随光合作用增加，而有机氮和硝酸盐浓度则下降。增加氮素供应则产生相反的效果。因此，TNC和有机氮浓度呈负相关（r = -0.90）。当两种资源均非限制时，氮或TNC的库大小随氮素和光照有效性增加，但当其中一种资源受到限制时，增加很少或保持不变。当两种资源以相同速率供应时，储存量达到最小值。
