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Occurrence of amoebae on oak leaf lettuce lactuca sativa var crispa and boston lettuce lactuca sativa var capitata



Occurrence of amoebae on oak leaf lettuce lactuca sativa var crispa and boston lettuce lactuca sativa var capitata



Journal of Protozoology 31(3): 454-455



The colonization, distribution, population density and species diversity of amoebae on leaves of oak leaf lettuce, L. sativa var. crispa and Boston lettuce L. sativa var. capitata, were investigated. The role of soil in the colonization of oak leaf lettuce was determined by comparing numbers of amoebae present on basal leaves (those that pass through soil) with numbers on wrapped leaves (those that do not pass through soil). Amoebae were present in 10 samples of basal leaves and ranged from 154-1510/g of leaf tissue. Wrapped leaves failed to yield amoebae in 7 of 10 trials and contained < 4 amoebae/g of tissue. Mean values for the population density of amoebae on oak leaf basal leaves and Boston lettuce leaves were 484 .+-. 133 and 453 .+-. 93, respectively. The distribution of amoebae on green and white parts of leaves from both kinds of lettuce was studied. The occurrence of amoebae on rinsed, unrinsed, visibly clean and visibly dirty samples of Boston lettuce leaves was established.

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Accession: 006017549

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