The proportion of assimilates drawn into the spherical gall from distal leaflets tended to be higher in cohabiting than in solitary galls (5 of 7 bivariate means above the diagonal in [ILLUSTRATION FOR FIGURE 6 OMITTED]), although only two of the differences were significant statistically.
Unlike galls on intact leaflets, crescent galls that had their leaflet blades removed (simulating insect herbivory) drew assimilates from distal leaflets on the same leaf when tested in October.
We demonstrated, for the first time, that interspecific exploitative competition for plant assimilates occurs between two aphid-induced sinks.
However, there is no reason to doubt that when the crescent galls cohabit with spherical galls on any tree, competition for assimilates is the mechanism behind the (often observed) mortality of the crescent galls.
1985), facilitating the movement of assimilates among mature leaflets and leaves, a phenomenon that does not occur in ungalled Pistacia shoots (Takeda et al.
The fact that the spherical and crescent gall makers competed for phloem assimilates is illustrated by our finding that both species' galls imported less assimilates when they cohabited than when they did not [ILLUSTRATION FOR FIGURE 4 OMITTED].
In this study we measured the flow of assimilates to the gall sink via the phloem.
Preliminary studies on the translocation of 14C-labelled assimilates and 32P[O.sup.3-] towards the gall evoked by Cynips (Diplolepis) quercus-folii L.
Colony size of Tuberolachnus salignus (Gmelin) in relation to mass transport of 14C-labelled assimilates from the leaves in willow.