Assertion: nodule's concentration | /r/HasProperty | regulated
Facets:
value: very finely
type: DEGREE
Source sentences:
text: Considered together, these observations mean that (a) not only the presence of NO is necessary for the establishment of the symbiotic interaction, but the contribution of exogenous NO influences the dynamics of the symbiotic process and that (b) an excess like a lack of NO disturbs the establishment of the symbiosis, and therefore, NO concentration in the target tissues must be very finely regulated to allow the proper progress of the symbiosis.