1970
DOI: 10.1094/phyto-60-1128
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Biology of Phytophthora Zoospores

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Cited by 66 publications
(41 citation statements)
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“…Zoospores of the facultatively parasitic, plant-pathogenic genera Phytophthora, Pythium, and Aphanomyces typically accumulate around the roots of susceptible and non-susceptible plants and respond chemotactically to exudates or extracts of these roots, usually in a completely non host-specific manner (Hickman, 1970); e.g., zoospores of Aphanomyces euteiches, a pathogen of peas, are attracted to the roots of many other legumes, as well as to roots of corn, a monocot (Cunningham and Hagedorn, 1962). These zoospores also respond chemotactically to a variety of metabolites, especially amino acids and sugars (Bimpong and Clerk, 1970;Hickman, 1970). In the saprophyte Allomyces the meiospores, mitospores, and zygotes respond chemotactically to certain amino acids (Machlis, 1969a Carlile and Machlis, 1965b).…”
Section: Discussionmentioning
confidence: 99%
See 1 more Smart Citation
“…Zoospores of the facultatively parasitic, plant-pathogenic genera Phytophthora, Pythium, and Aphanomyces typically accumulate around the roots of susceptible and non-susceptible plants and respond chemotactically to exudates or extracts of these roots, usually in a completely non host-specific manner (Hickman, 1970); e.g., zoospores of Aphanomyces euteiches, a pathogen of peas, are attracted to the roots of many other legumes, as well as to roots of corn, a monocot (Cunningham and Hagedorn, 1962). These zoospores also respond chemotactically to a variety of metabolites, especially amino acids and sugars (Bimpong and Clerk, 1970;Hickman, 1970). In the saprophyte Allomyces the meiospores, mitospores, and zygotes respond chemotactically to certain amino acids (Machlis, 1969a Carlile and Machlis, 1965b).…”
Section: Discussionmentioning
confidence: 99%
“…A single petri dish could accommodate up to three tubes, and thus media from different sources (uninoculated DYpSs, or media from cultures of several hosts) could be compared under identical conditions. This method is a variation on the capillary method in which molten agar is used to fill the glass tube and to assay chcmotaxis of fungal zoosporcs (e.g., Carlile and Machlis, 1965a;Hickman, 1970) and of other motile cells.…”
Section: Host-parasite Interaction Assaysmentioning
confidence: 99%
“…That motile zoospores of P. fragariae infect host plant roots immediately behind the root tip (Hickman, 1970) suggests that a more branched root system would lead to more disease. In this study, the positive correlation obtained for tertiary and higher order roots of non-colonised plants and disease concurs with this expectation (Table 3 and Figure 4).…”
Section: ! 1mentioning
confidence: 99%
“…Encysted zoospores of Phytophthora and Pythium spp. almost always germinated from the side of the spore nearest the incipient infection site (Hickman, 1970;Royle and Hickman, 1964). Root exudates, whether from intact roots or from extract-filled glass capillaries, served as chemical attractants for spore germination and subsequent growth.…”
Section: Roje Of Chemical Signalsmentioning
confidence: 99%