||Effect of Stress and Non-Stress Conditions Upon the Interaction of Plectonema Boryanum and the LPP-Phycoviruses.
Canno, Robert E. ;
||Delaware Univ., Newark. Dept. of Biological Sciences.
||OWRR-A-016-DEL; 05960,; A-016-DEL(4)
Aquatic microbiology ;
Plant viruses ;
Aquatic microorganisms ;
Aquatic plants ;
Plectonema boryanum ;
LPP phycoviruses ;
Host parasite relations ;
Water pollution effects(Animals)
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||Lysogeny was established in Plectonema boryanum, a filamentous blue-green alga, by LPP-1D and LPP-2 phycoviruses after treatment of the alga with antibiotics, heavy metal, and nutrient limitation. Mitomycin C induction and viral neutralization confirm lysogeny. Infection of antibiotic treated cells by LPP-1 virus failed to establish lysogeny, indicating that LPP-1 is a virulent phycovirus while LPP-1D and LPP-2 were found to be temperate viruses. Continuous culture techniques were also used to study long-term population interactions of Plectonema and the LPP-viruses. After LPP-1 infection of sensitive algae, three oscillations occur in cell density with concomitant increases in virus before final stabilization of both algal and phycoviral populations. After LPP-1D and LPP-2 infection, only one fall in cell density occurs with a burst of virus particles. Resistant algae always repopulated; lysogeny was never established in chemostat experiments.
||Investigates the host-parasite relationship between Plectonema boryanum and the LPP-phycoviruses.
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||6M; 57K#; 68D
||PC A03/MF A01