Beyer E M, Quebedeaux B
Central Research Department, Experimental Station, E. I. du Pont de Nemours and Company, Wilmington, Delaware 19898.
Plant Physiol. 1974 Nov;54(5):788-90. doi: 10.1104/pp.54.5.788.
The influence of calcium nutrition on ethylene-induced abscission was studied by growing cotton (Gossypium hirsutum L. cv. Stoneville 213) and bean (Phaseolus vulgaris L. cv. Resistant Black Valentine) plants for several weeks in nutrient solutions containing 2, 10 (normal level), 15, or 20 meq/l of calcium, and then treating the plants with ethylene. Increasing the calcium level of cotton from 2 to 20 meq/l resulted in a 9-fold increase in the calcium content of the abscission zone and a maximum reduction of 25% in the amount of leaf abscission induced by ethylene (9 mul/l). Bean plants grown on 10, 15, or 20 meq/l calcium solutions showed corresponding increases in the calcium content of the abscission zone but showed no significant differences in the rate of ethyleneinduced abscission. Only at the lowest calcium level of 2 meq/l, where deficiency symptoms became apparent, was a significant effect observed. These results suggest that under normal cultural practices calcium nutrition has little influence on the rate of ethylene-induced abscission.
通过在含有2、10（正常水平）、15或20毫当量/升钙的营养液中培养棉花（陆地棉品种斯通维尔213）和菜豆（菜豆品种抗黑瓦伦丁）植株数周，然后用乙烯处理这些植株，研究了钙营养对乙烯诱导脱落的影响。将棉花的钙水平从2毫当量/升提高到20毫当量/升，导致离层区钙含量增加9倍，乙烯（9微升/升）诱导的叶片脱落量最大减少25%。在10、15或20毫当量/升钙溶液中生长的菜豆植株，离层区钙含量相应增加，但乙烯诱导的脱落速率没有显著差异。仅在钙水平最低的2毫当量/升时，缺乏症状明显，才观察到显著影响。这些结果表明，在正常栽培条件下，钙营养对乙烯诱导的脱落速率影响很小。
