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Morphological Structure

Clades


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Phytophthora melonis
Phytophthora spp. in subclade 7b: portion of the seven-loci ML phylogeny featuring the type cultures of 212 described species (by T. Bourret). Notice the position of P. melonis Ex-type CBS 582.69 = S&T BL 23. Gloria Abad, USDA S&T.
Phytophthora melonis
Phytophthora spp. in subclade 7b: Morphological Tabular key (PDF) and Tabular key legends (PDF) in IDphy2 KEY SECTION. Notice the data of P. melonis Ex-type CBS 582.69 = S&T BL 23. Gloria Abad, USDA S&T.
Phytophthora melonis

Phytophthora melonis (CPHST BL 23) colonies of the ex-type grown for 7 days on (a) V8® Agar, (b) potato dextrose agar, and (c) malt extract agar; photo by Krysta Jennings and Leandra Knight, USDA-APHIS-PPQ

Phytophthora melonis

Phytophthora melonis (CPHST BL 159) colonies of a selected specimen grown for 7 days on (a) V8® Agar, (b) potato dextrose agar, and (c) malt extract agar; photo by Krysta Jennings and Leandra Knight, USDA-APHIS-PPQ


Phytophthora melonis

Phytophthora melonis (CPHST BL 160) colonies of a selected specimen grown for 7 days on (a) V8® Agar, (b) potato dextrose agar, and (c) malt extract agar; photo by Krysta Jennings and Leandra Knight, USDA-APHIS-PPQ

Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase showing nonpapillate sporangia (a–g), sometimes caducous with medium to long pedicels (e–g), hyphal swellings (a, b), and internal proliferation (c); photos by Gloria Abad USDA-APHIS-PPQ.

Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase: nonpapillate sporangium with medium length pedicel; photo by Gloria Abad USDA-APHIS-PPQ.


Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase: nonpapillate sporangium with long pedicel; photo by Gloria Abad USDA-APHIS-PPQ.

Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase: nonpapillate sporangium with medium length pedicel; photo by Gloria Abad USDA-APHIS-PPQ.

Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase: nonpapillate sporangium with long pedicel; photo by Gloria Abad USDA-APHIS-PPQ.

Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase: nonpapillate sporangia with long pedicels; photo by Gloria Abad USDA-APHIS-PPQ.


Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase: nonpapillate sporangium with medium length pedicel; photo by Gloria Abad USDA-APHIS-PPQ.

Phytophthora melonis

Phytophthora melonis (CPHST BL 23, ex-type) asexual phase: sporangia with internal proliferation; photo by Gloria Abad USDA-APHIS-PPQ.

Phytophthora mengei
Phytophthora spp. in subclade 2b: portion of the seven-loci ML phylogeny featuring the type cultures of 212 described species (by T. Bourret). Notice the position of P. mengei Ex-type ATCC MYA-4554 = S&T BL 31. Gloria Abad, USDA S&T.
Phytophthora mengei
Phytophthora spp. in subclade 2b: Morphological Tabular key (PDF) and Tabular key legends (PDF) in IDphy2 KEY SECTION. Notice the data of P. mengei Ex-type ATCC MYA-4554 = S&T BL 31. Gloria Abad, USDA S&T.

Phytophthora mengei

Phytophthora mengei (CPHST BL 31) colonies of the ex-type grown for 7 days on (a) V8® Agar, (b) potato dextrose agar, and (c) malt extract agar; photo by Krysta Jennings and Leandra Knight, USDA-APHIS-PPQ

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) sexual phase: (a–f) oogonia with antheridia paragynous, and plerotic oospores; (d–f) oogonia with tapered stalks and with a slight hook in the taper; photos by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) asexual phase: (a) sporangia semipapillate, persistent, ellipsoid, ovoid, and irregular shapes, produced in simple sympodial or in single long sporangiophores; hyphal swellings rarely produced (arrows); (b) sporangia semipapillate with one and two papillae; (c) sporangium semipapillate persistent; folding of sporangiophore giving the appearance to be a short pedicel; photos by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) asexual phase: sporangia semipapillate with one and two papillae; photo by Gloria Abad, USDA-APHIS-PPQ.


Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) asexual phase: semipapillate sporangium; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) asexual phase: semipapillate sporangium; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) sexual phase: plerotic oospore with paragynous antheridium, and oogonium with tapered stalk and with a slight hook in the taper; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) sexual phase: plerotic oospore with paragynous antheridium, and oogonium with tapered stalk and with a slight hook in the taper; photo by Gloria Abad, USDA-APHIS-PPQ.


Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) sexual phase: plerotic oospore with paragynous antheridium, and oogonium with tapered stalk and with a slight hook in the taper; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) sexual phase: plerotic oospore with paragynous antheridium; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) sexual phase: plerotic oospore with paragynous antheridium; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) sexual phase: plerotic oospore with paragynous antheridium; photo by Gloria Abad, USDA-APHIS-PPQ.


Phytophthora mengei

Phytophthora mengei (ex-type CPHST BL 31) asexual phase: sporangia semipapillate, persistent, ellipsoid, ovoid, and irregular shapes, produced in simple sympodial or in single long sporangiophores; hyphal swellings rarely produced; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora mexicana (in progress - Abad et al. 2023b)
Phytophthora spp. in subclade 2b: portion of the seven-loci ML phylogeny featuring the type cultures of 212 described species (by T. Bourret). Notice the position of P. mexicana selected specimen CBS 149405 = S&T BL 199. Gloria Abad, USDA S&T.
Phytophthora mexicana (in progress - Abad et al. 2023b)
Phytophthora spp. in subclade 2b: Morphological Tabular key (PDF) and Tabular key legends (PDF) in IDphy2 KEY SECTION. Notice the data of P. mexicana selected specimen CBS 149405 = S&T BL 199. Gloria Abad, USDA S&T.   
Phytophthora mexicana (in progress - Abad et al. 2023b)

Phytophthora mexicana (CPHST BL 24) colonies of a selected specimen grown for 7 days on (a) V8® Agar, (b) potato dextrose agar, and (c) malt extract agar; photo by Krysta Jennings and Leandra Knight, USDA-APHIS-PPQ