热带作物学报2018，Vol.39Issue(1)：27-33,7.DOI:10.3969/j.issn.1000-2561.2018.01.005
不同磷水平对不同基因型烤烟磷素吸收动力学参数特征的影响
Effects of Different Phosphorus Levels on Phosphorus Uptake Kinetics Parameters in Different Genotypes of Flue Cured Tobacco
摘要
Abstract
The effects of different flue cured tobacco varieties on P uptake and (H2PO4--P) uptake kinetic parameters were studied by sand culture method under the condition of lack of phosphorus,suitable phosphorus AND excess phosphorus.The results showed that the uptake of H2PO4--P of tobacco pretreated with different concentrations of phosphorus was in accordance with Michelis-Menten equation.The absorption kinetics parameters Vmax value and Km were different with the increase of phosphorus concentration;Vmax value of K326,Yueyan97,Yueyan98 was respectively the highest in 0.05 mmol/L,10 mmol/L and 20 mmol/L phosphorus,and Km values were the minimum in 20 mmol/L,10 mmol/L and 20 mmol/L phosphorus and the maximum force.At 0.05 mmol/L phosphorus treatment,different varieties of tobacco on H2PO4--P absorption rate was as follows:K326＞Yueyan97＞Yueyan98;At 10 mmol/L phosphorus treatment,H2PO4--P absorption rate was:K326 ≈Yueyan97＞Yueyan98;At 20 mmol/L phosphorus treatment,the absorption rate of H2PO4--P was as follows:K326＞Yueyan97≈Yueyan98.The results showed that the change of H2PO4--P absorption rate of different varieties of tobacco was great with different concentrations of phosphorus supply,and there were differences in the affinity of tobacco genotypes.The effect of low phosphorus stress on the absorption rate of K326 low affinity system,and the effect of high phosphorus stress on the Yueyan98 high affinity system,however,the phosphorus uptake rate of Yueyan97 was inhibited by low P and P stress.关键词
烤烟/磷水平/吸收/动力学参数/亲和力Key words
flue cured tobacco/phosphorus concentration/absorption/kinetic parameters/affinity分类
农业科技引用本文复制引用
张德龙,张士荣,王军,丁效东..不同磷水平对不同基因型烤烟磷素吸收动力学参数特征的影响[J].热带作物学报,2018,39(1):27-33,7.基金项目
提高烟叶田间耐熟性综合生产技术开发与示范[粤烟科(2014)1号] （2014）
烤烟养分高效利用的根际生态调控与根系优化耦合技术研究与示范(No.201545000034017) （No.201545000034017）
山东省烟草产业体系(No.SDAIT-25-04). （No.SDAIT-25-04）
