SYMBIOTIC DINITROGEN FIXATION AND HOST-PLANT GROWTH DURING DEVELOPMENT OF AND RECOVERY FROM PHOSPHORUS DEFICIENCY

被引:51
作者
ISRAEL, DW [1 ]
机构
[1] N CAROLINA STATE UNIV,USDA ARS,PLANT PHYSIOL PROGRAM,RALEIGH,NC 27695
关键词
BRADYRHIZOBIUM-JAPONICUM; DINITROGEN FIXATION; GLYCINE-MAX; PHOSPHORUS DEFICIENCY; SOYBEAN;
D O I
10.1111/j.1399-3054.1993.tb05502.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Characterization of nodule growth and function, phosphorus and nitrogen status of plant tissues and host-plant-growth of nodulated soybean (Glycine mar L. Merr.) plants developing and recovering from phosphorus deficiency was used to evaluate the role of phosphorus in symbiotic dinitrogen fixation. The sequence of physiological responses during recovery from phosphorus deficiency was; (1) rapid uptake of phosphorus, (2) rapid increases in the phosphorus concentration of leaves and nodules, (3) enhanced growth and function of nodules, (4) increased nitrogen concentrations in all plant organs and (5) enhanced plant growth. The sequence of physiological responses to onset of phosphorus deficiency was; (1) decreased phosphorus uptake, (2) decreased phosphorus concentrations in leaves and nodules, (3) decreased nodule function, (4) decreased nitrogen concentration in plant organs and (5) decreased plant growth. These results, in conjunction with previously published data (Sa and Israel, Plant Physiol. 97: 928-935, 1991), support an interpretation that the total response of symbiotic dinitrogen fixation in soybean plants to altered phosphorus supply is a function of both indirect effects on host-plant growth and more direct effects on the metabolic function of nodules.
引用
收藏
页码:294 / 300
页数:7
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