Abstract
Summary Yeast densities in phyllosphere of different field-grown plants ranged between 1.4 × 10 to 4.3 × 103 cells/g. Their highest counts were found in the phyllosphere of grape as well as wheat and Egyptian clover, while their lowest counts were in the phyllosphere of cabbage and cowpea. Interrelationships between phyllosphere, soil, and rhizosphere yeast populations were observed. The highest yeast counts were found in the phyllosphere of plants, grown in silty clay and sewageirrigated soils, while the lowest counts were found in those of plants, grown in salt and alkalineaffected soils. Rhodotorula glutinis, Cryptococcus albidus, Crypt, diffluens, Torulopsis famata, T. aeria, Candida curvata, C. humicola and Debaryomyces kloeckrii were the yeast species found in the phyllosphere. The pigmented yeast R. glutinis was the common yeast in the phyllosphere, where it constituted 50% of the total isolates, while Crypt. albidus did not exceed 20% of the total isolates. The spore-forming yeasts were less dominant in the phyllosphere samples.
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