Department of Horticulture, Pesticide Research Center, Michigan State University, East Lansing, Michigan 48824.
Plant Physiol. 1978 May;61(5):851-4. doi: 10.1104/pp.61.5.851.
Triacontanol applied to IR-8 rice (Oryza sativa L.) seedlings in nutrient solution caused an increase in dry weight during a 6-hour dark period. This increase was altered by atmospheric CO(2) and O(2) concentrations. The largest growth response occurred from 200 to 350 muliters/liter CO(2) with 5% O(2). The treated seedlings did not fix atmospheric CO(2) in the dark, and the immediate products of photosynthesis were not involved in the dry weight increase. The growth response was characterized by an increase in soluble and insoluble Kjeldahl-N, and soluble carbohydrates. The response curve for dry weight increase was a linear function of log presentation time of triacontanol. The response exhibited an apparent K(dose) of 25 minutes in 10 mug/liter triacontanol in the dark and 18 minutes in the light. Concentrations of 50 mug/liter and higher inhibited growth.
三羟甲基丙烷应用于营养溶液中的 IR-8 水稻（Oryza sativa L.）幼苗，在 6 小时的黑暗期内导致干重增加。这种增加受到大气 CO(2)和 O(2)浓度的影响。在 5% O(2)条件下，200 至 350 微升/升 CO(2)浓度下的生长反应最大。处理过的幼苗在黑暗中不固定大气 CO(2)，光合作用的直接产物也不参与干重增加。生长反应的特征是可溶和不可溶凯氏氮以及可溶碳水化合物的增加。干重增加的响应曲线是三羟甲基丙烷的对数呈现时间的线性函数。在黑暗中，10 微克/升三羟甲基丙烷的黑暗反应的表观 K(dose)为 25 分钟，在光照下为 18 分钟。50 微克/升及更高浓度的三羟甲基丙烷抑制生长。
