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Morphological Structure

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Phytophthora iranica

Phytophthora iranica (ex-type CPHST BL 40) asexual phase: papillate caducuos sporangium; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora iranica

Phytophthora iranica (ex-type CPHST BL 40) asexual phase: papillate caducuos sporangium; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora iranica

Phytophthora iranica (ex-type CPHST BL 40) asexual phase: papillate caducuos sporangium with medium length pedicel; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora irrigata
Phytophthora spp. in subclade 9a: portion of the seven-loci ML phylogeny featuring the type cultures of 212 described species (by T. Bourret). Notice the position of P. irrigata Ex-type NRRL 64264 = S&T BL 41. Gloria Abad, USDA S&T.

Phytophthora irrigata
Phytophthora spp. in subclade 9a: Morphological Tabular key (PDF) and Tabular key legends (PDF) in IDphy2 KEY SECTION. Notice the data of P. irrigata Ex-type NRRL 64264 = S&T BL 41. Gloria Abad, USDA S&T.
Phytophthora irrigata

Phytophthora irrigata (CPHST BL 41) colonies of the ex-type grown for 7 days on (a) V8® Agar, (b) potato dextrose agar, and (c) malt extract agar; photo by Clinton Greub, Krysta Jennings, and Leandra Knight, USDA-APHIS-PPQ

Phytophthora javanensis
Phytophthora spp. in subclade 10a: portion of the seven-loci ML phylogeny featuring the type cultures of 212 described species (by T. Bourret). Notice the position of P. javanensis Ex-type CBS 149203. Gloria Abad, USDA S&T.
Phytophthora javanensis
Phytophthora spp. in subclade 10a: Morphological Tabular key (PDF) and Tabular key legends (PDF) in IDphy2 KEY SECTION. Notice the data of P. javanensis Ex-type CBS 149203. Gloria Abad, USDA S&T.

Phytophthora kelmanii
Phytophthora spp. in subclade 8a: portion of the seven-loci ML phylogeny featuring the type cultures of 212 described species (by T. Bourret). Notice the position of P. kelmanii Ex-type CBS 146551. Gloria Abad, USDA S&T.
Phytophthora kelmanii
Phytophthora spp. in subclade 8a: Morphological Tabular key (PDF) and Tabular key legends (PDF) in IDphy2 KEY SECTION. Notice the data of P. kelmanii Ex-type CBS 146551. Gloria Abad, USDA S&T.
Phytophthora kelmanii

colony morphology after 5 d growth at 20ºC on carrot agar

Phytophthora kelmanii

persistent, non-papillate, predominantly ovoid sporangia in loose sympodia with internal proliferation; scale bar = 20µm


Phytophthora kelmanii

oogonia containing aplerotic oospores, with large ooplasts which turn brown on maturity; oospores often abort; scale bar = 20µm

Phytophthora kelmanii

distinctive globose hyphal swellings in chains; scale bar = 20µm

Phytophthora kernoviae
Phytophthora spp. in subclade 10a: portion of the seven-loci ML phylogeny featuring the type cultures of 212 described species (by T. Bourret). Notice the position of P. kernoviae Ex-type NRRL 64375 = S&T BL 91. Gloria Abad, USDA S&T.
Phytophthora kernoviae
Phytophthora spp. in subclade 10a: Morphological Tabular key (PDF) and Tabular key legends (PDF) in IDphy2 KEY SECTION. Notice the data of P. kernoviae Ex-type NRRL 64375 = S&T BL 91. Gloria Abad, USDA S&T.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91) 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 kernoviae

Phytophthora kernoviae (CPHST BL 91 ex-type) asexual phase: (a–c) sporangia produced in simple sympodial sporangiophores, (d–f) papillate sporangia with medium-length pedicels formed on V8 agar flooded with soil extract, (d) ovoid, (e) obpyriform, and (f) ellipsoid shapes, (g) coralloid/toruloid hyphal swellings; photos by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91, ex-type) sexual phase: (a–f) oogonia smooth-walled, (d–f) with tapered base; (a–f) antheridia amphigynous (different shapes); oospores plerotic with thick walls, except (f); photos by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (selected specimen P10681) asexual phase: (a–c) sporangia produced in (a) close simple sympodial and (b, c) unbranched sporangiophores; (d–f) papillate sporangia with medium-length pedicels formed on V8 agar flooded with soil extract; (d) ovoid, (e) ellipsoid with tapered top, (f) irregular shape; (g) zoospores in sporangium; photos by Gloria Abad, USDA-APHIS-PPQ.


Phytophthora kernoviae

Phytophthora kernoviae (selected specimen P10956): colony shape on (a) V8 agar, (b) potato dextrose agar; (c, d) sporangia born in sporangiophores; (e–f) papillated sporangia with pedicels (e) short, (f) medium-length; (g–e) sexual phase with smooth-walled oogonia with amphigynous antheridia, (g) thick-walled plerotic oospore, (e) medium thick-walled plerotic oospore; photos by Gloria Abad, USDA-APHIS-PPQ

Phytophthora kernoviae

Phytophthora kernoviae (selected specimen P10957) asexual phase: (a) sporangia produced in unbranched sporangiophore; (b, c) sporangia with long pedicels formed on V8 agar flooded with soil extract; (d) sporangium with medium pedicel; photos by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91, ex-type) sexual phase: smooth-walled oogonium, antheridium amphigynous,and plerotic oospore with thick walls; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91 ex-type) asexual phase: coralloid/toruloid hyphal swellings; photo by Gloria Abad, USDA-APHIS-PPQ.


Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91, ex-type) sexual phase: smooth-walled oogonium, antheridium amphigynous,and plerotic oospore with thick walls; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91 ex-type) asexual phase: sporangia produced in simple sympodial sporangiophores; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91, ex-type) sexual phase: smooth-walled oogonium, antheridium amphigynous,and plerotic oospore with thick walls; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91, ex-type) sexual phase: smooth-walled oogonium with tapered bases, antheridium amphigynous,and plerotic oospore with thick walls; photo by Gloria Abad, USDA-APHIS-PPQ.


Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91, ex-type) sexual phase: smooth-walled oogonium with tapered bases, antheridium amphigynous,and plerotic oospore with thick walls; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91 ex-type) asexual phase: papillate ovoid sporangium with medium-length pedicel formed on V8 agar flooded with soil extract; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91 ex-type) asexual phase: papillate obpyriform sporangium with medium-length pedicel formed on V8 agar flooded with soil extract; photo by Gloria Abad, USDA-APHIS-PPQ.

Phytophthora kernoviae

Phytophthora kernoviae (CPHST BL 91 ex-type) asexual phase: papillate ellipsoid sporangium with medium-length pedicel formed on V8 agar flooded with soil extract; photo by Gloria Abad, USDA-APHIS-PPQ.