Tripp K E, Peet M M, Pharr D M, Willits D H, Nelson P V
Department of Horticultural Science, North Carolina State University, Raleigh, North Carolina 27695-7609.
Plant Physiol. 1991 Jul;96(3):713-9. doi: 10.1104/pp.96.3.713.
Yield increases observed among eight genotypes of tomato (Lycopersicon esculentum Mill.) grown at ambient CO(2) (about 350) or 1000 microliters per liter CO(2) were not due to carbon exchange rate increases. Yield varied among genotypes while carbon exchange rate did not. Yield increases were due to a change in partitioning from root to fruit. Tomatoes grown with CO(2) enrichment exhibited nonepinastic foliar deformation similar to nutrient deficiency symptoms. Foliar deformation varied among genotypes, increased throughout the season, and became most severe at elevated CO(2). Foliar deformation was positively related to fruit yield. Foliage from the lower canopy was sampled throughout the growing season and analysed for starch, K, P, Ca, Mg, Fe, and Mn concentrations. Foliar K and Mn concentrations were the only elements correlated with deformation severity. Foliar K decreased while deformation increased. In another study, foliage of half the plants of one genotype received foliar applications of 7 millimolar KH(2)PO(4). Untreated foliage showed significantly greater deformation than treated foliage. Reduced foliar K concentration may cause CO(2)-enhanced foliar deformation. Reduced K may occur following decreased nutrient uptake resulting from reduced root mass due to the change in partitioning from root to fruit.
在环境二氧化碳浓度（约350）或1000微升/升二氧化碳浓度下种植的8种番茄（番茄属）基因型中观察到的产量增加并非由于碳交换率的提高。基因型间产量存在差异，而碳交换率没有。产量增加是由于分配从根向果实的转变。在二氧化碳浓度升高条件下种植的番茄未表现出类似营养缺乏症状的叶片反卷变形。叶片变形在基因型间存在差异，在整个生长季节中增加，并在二氧化碳浓度升高时变得最为严重。叶片变形与果实产量呈正相关。在整个生长季节对下层冠层的叶片进行采样，并分析其淀粉、钾、磷、钙、镁、铁和锰的浓度。叶片钾和锰的浓度是仅与变形严重程度相关的元素。随着变形增加，叶片钾含量下降。在另一项研究中，对一种基因型一半植株的叶片喷施7毫摩尔的磷酸二氢钾。未处理的叶片比处理过的叶片表现出明显更严重的变形。叶片钾浓度降低可能导致二氧化碳增强的叶片变形。由于分配从根向果实的转变导致根质量减少，养分吸收降低，进而可能导致钾含量降低。
