These
results seem to indicate that yard long bean is tolerant to root oxygen deficiency to some extent, in spite of the
established fact that this species is susceptible to waterlogging.
As stated previously, waterlogged plants received
2 different effects, i.e. direct effects of root oxygen
deficiency and indirect effects other than root oxygen
deficiency, which are mainly mediated by the soil microorganisms
(Fitter and Hey, 1981). The results of the experiment
in the last section clearly showed that yard long bean
is susceptible to some of indirect effects of waterlogging
caused by other factors than root oxygen deficiency.