NITROGEN-FIXATION IN PARA-NODULES OF WHEAT ROOTS BY INTRODUCED FREE-LIVING DIAZOTROPHS

被引：31
|
作者：
TCHAN, YT [1 ]
ZEMAN, AMM [1 ]
KENNEDY, IR [1 ]
机构：
[1] UNIV SYDNEY,DEPT AGR CHEM,SYDNEY,NSW 2006,AUSTRALIA
来源：
PLANT AND SOIL | 1991年 / 137卷 / 01期
关键词：
AZOSPIRILLUM; NITROGEN FIXATION; PARA-NODULES; WHEAT; 2,4-D;
D O I：
10.1007/BF02187430
中图分类号：
S3 [农学（农艺学）];
学科分类号：
0901 ;
摘要：
Nitrogen-fixation (C2H2-reduction) was demonstrated in wheat root nodules (p-nodules) induced by 2,4-dichlorophenoxyacetate (2,4-D) and inoculated with A. brasilense. By lowering the O2 tension it was possible to distinguish the nitrogenase activity of bacteria located within the p-nodule of the wheat root system from that in the rhizosphere. Using cytological evidence, nitrogenase activity was attributed mainly to be coming from the bacteria within the p-nodule. It was also shown that the host plant was able to supply the necessary substrate required for the bacterial N2-fixation (C2H2-reduction) within the p-nodules.
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页码：43 / 47
页数：5
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