Effect of soil copper accumulation on proliferation and survival of rhizobia
Abstract
103 words
Two strains of the fast-growing bean rhizobia- PV1 and PV2
and two others of the slow-growing cowpea and soybean
bradyrhizobia- CP1 and GM8 respectively, were used to test
their in vitro proliferation and in vivo survival. Known amounts
of each of the four strains studied were exposed to Cu
concentrations in the range:- 0, 20, 40, 60, 80 and 100 ppm both
in vitro and in vivo. It was observed that slow-growing rhizobia
are more susceptible to Cu toxicity both in vitro and in vivo
than the fast-growing rhizobia.It is important however to assess
the effect of copper on nodulation and nitrogen fixing.
Subjects
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