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Effect of bursaphelenchus xylophilus on the assimilation and translocation of carbon 14 in pinus sylvestris


, : Effect of bursaphelenchus xylophilus on the assimilation and translocation of carbon 14 in pinus sylvestris. Journal of Nematology 22(4): 506-512

THe effect of wound, wound + water, wound + Bursaphelenchus xylophilus culture filtrate, or wound + lethal B. xylophilus doses on the assimilation and translocation of 14C by 8-month-old Pinus sylvestris seedlings was tested. In two separate experiments, pine seedlings were exposed to 28.35 .mu.Ci of 14CO2 for 20 minutes below or above (to the pine shoot leader) the point of nematode inoculation. After 2 and 4 hours of dark adapatation, 80% ethanol soluble 14C tissue extracts were determined by liquid scintillation counting. Nematode infection significantly (P = 0.05) decreased 14C assimilation. Treatments translocated less than 6% of the total amount of the fixed 14C and translocation generally decreased with increasing size of nematode inoculum. However, nematode-infected pines translocated a greater proportion of the amount of 14C fixed per gram of exposed plant tissue than did the control pines. The lower levels of photoassimilate entering the plant system probably resulted in a reduced metabolic capacity in B. xylophilus-infected pine seedlings. The effect on photosynthesis could be one of the key factors leading to death of pines through starvation, and it is possible that it was preceded by an effect on related physiological processes such as water uptake.

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Other references

Kinnear, A.A.; Pretorius, P.J., 1962: Sulphobromophthalein clearance and porphyrin excretion in kwashiorkor. S. For earlier work see Title 945 and Abst. 2994, Vol. 27. The subjects were 9 with overt kwashiorkor and 6 at the stage of initiation of cure. Clearance coefficients of sulphobromophthalein, estimated by the method of Lavers, G. D., et al., J. Lab....

DeLorey, D.S.; Wang, S.S.; Shoemaker, J.Kevin., 2002: Evidence for sympatholysis at the onset of forearm exercise. The effect of augmented sympathetic outflow on forearm vascular conductance after single handgrip contractions of graded intensity was examined to determine whether sympatholysis occurs early in exercise (n = 7). While supine, subjects performed c...

Antimoniĭ, R.G.; Timchenko, A.V., 1983: Louis-Bar syndrome in an 8-year-old child. Vestnik Rentgenologii i Radiologii: 81-82

Bush Andrew M.; Bambach Richard K., 2004: Are secular trends in tiering, motility, and predation real? Quantifying and testing changes in ecospace use between the Paleozoic and Cenozoic. Organisms segregate into different sections of the "multidimensional hypervolume" of ecospace in order to coexist in the same environment. To quantify changes in the use of ecospace between level-bottom, marine paleocommunities from the...

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Schiraldi, O.; Dentico, P.; Angarano, G.; Buongiorno, R.; Lapedota, E.; Pastore, G., 1978: Factors of contagiousness in the epidemiology of hepatitis type B. Since morbidity of viral hepatitis B is increasing, the causes of diffusion of this infection have been studied. There are several routes of transmission and undoubtedly apparent non-parenteral routes have a great importance. In a study performed...

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Newman, P.M.; Dean, D.A.; Young, D.M., 1983: Design of powder inhalers. Practitioner 227(1385): 1773-1777

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