P. putida UW4 significantly released the inhibition of hypoxic
stresses on cucumber plants biomass. The protein profiles of
the roots of cucumber seedlings in response to the plantgrowth-
promoting bacterium P. putida UW4 and hypoxia have
suggested how the protein and metabolism pathways are
regulated. Fig. 5 shows a model of this PGPB and the hypoxic
stress response. P. putida UW4 and hypoxic stress stimulated
gene expression, the mRNA was processed and translated, the
proteins involved in carbohydrate metabolism, nitrogen
metabolism, defense stress, antioxidant, binding and others
were induced, these proteins might be work cooperatively to
resist stress and keep plant growth on a more or less even
keel. This study also provided strategies to identify enzymes
potentially involved in the interaction between plants and
PGPB and to develop a better understanding of th