Studies on the genus Phytophthora in Malaysia, 2: Reproduction and sexuality
Studies on the reproduction and sexuality of P. palmivora, P. heveae, P. nicotianae var. parasitica, P. capsici and P. melongenae, indicated that generally sporangia were produced in cultures on a variety of nutrient media and at pH levels ranging from 4-9, although variations in the degree of sporulation were observed among species. In all the species germination of sporangia occurred at room temperature (28 +- 2 grade centigrade) whereas indirect germination by production of zoospores occurred when the sporangial suspension was chilled at 6 grade centigrade for 25 min and then returned to room temperature. Studies on oospore production showed P. heveae and P. capsici to be homothallic. Heterothallic pairings indicated that P. palmivora from durian and black pepper and P. melongenae from brinjal possessed a common compatibility factor (A1) and formed oospores readily when crossed with P. palmivora from cacao (A2). Temperature did not appear to influence oospore formation in the heterothallic pairings.
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| Format: | biblioteca |
| Published: |
1974
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| Subjects: | THEOBROMA CACAO, PHYTOPHTHORA PALMIVORA, PHYTOPHTHORA MELONGENAE, PHYTOPHTHORA CAPSICI, PHYTOPHTHORA NICOTIANAE, PHYTOPHTHORA HEVEAE, ENFERMEDADES FUNGOSAS, ESPORULACION, TEMPERATURA, MALASIA, |
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