摘要
镧（１０μｍｏｌＬ－１）和钙（１ｍｍｏｌＬ－１均降低水稻根系对ｋ＋的亲和力，以致钾的吸收下降。前者属竞争性抑制；镧促进磷的吸收，使ｋｍ值减小，Ｖｍａｘ增大，而钙则抑制磷的吸收，属反竞争性类型。
In the present study,experimental results revealed that the absorption of potassium was in-hibited by La(10μmol L-1) and Ca(1 mmol L-1)in rice roots.Lanthanum was a competitiveinhibitor of K+ uptake.La promoted the absorption of phosphorus.La decresed apparent Km andincreased the Vmax for P uptake.The absorption of P was inhibited by calcium.Kinetic analysisindicated that the inhibition was of a uncompetitive nature
出处
《安徽农业大学学报》
CAS
CSCD
1994年第4期494-497,共4页
Journal of Anhui Agricultural University
关键词
镧
钙
吸收速率
水稻
磷
钾
Lanthanum
Calcium
Rate of uptake
