摘要
采用终浓度为1ppm的2,4-D处理旱稻苗,无论是否接种固氮微生物,均能使其根部形成瘤状物。结瘤率、单株瘤数及瘤大小与接种菌无关,但不同旱稻品种的结瘤率有差异。乙炔还原测定表明,接种具离体固氮酶活的固氮微生物的稻苗,在某些情况下,能显示极微弱的固氮酶活,但与该稻苗是否用2,4-D处理尚无必然联系。稻瘤的含菌结瘤率约占总瘤数的33％～40％。初步鉴定稻瘤分离菌系原接种菌。
It was found that the nodulation of upland rice roots could be induced by lppm final concentration of 2, 4-D, whether N2-fixing microorganisms inoculated or not. The nodulation rate, number and the diameter of para-nodules seemed to have no relevance to the inocula. There are differenles of nodulation rates with different varieties of. the rice. Gas chromatograph showed that some of the rice seedlings infected by the inocula with Nase activities in vitra had exhibited very weak Nase activities in some cases. However, no relation to treatment of 2, 4-D and nase activity could be found in this experiment. The nodulation rate containing the bacteria was about 33%～40% of total para-nodules of upland rice. The bacteria isolated from the para-nodules was'preliminarily identified to be original inoculum.
出处
《中国农学通报》
CSCD
1993年第1期14-17,共4页
Chinese Agricultural Science Bulletin
基金
总理基金
关键词
旱稻
2
4-D
结瘤
固氮酶活
Upland rice 2,4-D Nodulation Nase activity
