Sarisodera Wouts & Sher, 1971

Ghaderi, Reza, 2019, An outline on distribution and hosts of the cystoid nematodes of Ataloderinae Wouts, 1973 and Meloidoderinae Golden, 1971, Zootaxa 4664 (3), pp. 339-350: 343-344

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Sarisodera Wouts & Sher, 1971


Sarisodera Wouts & Sher, 1971  

There is only one described species in the genus, S. hydrophila Wouts & Sher, 1971   , although some undetermined populations are reported in the literature. Wouts & Sher (1971) collected specimens of the genus Sarisodera   from soil or roots from several habitats and localities in California including willow ( Salix lasiolepis Benth.   , Salicaceae   ) from Riverside County; fern ( Polypodiaceae   ) and laurel ( Lauraceae   ) from the University of California, Berkeley campus; fern from Humboldt County; ironwood ( Lyonothamnus floribundus Gray   , Rosaceae   ) from Santa Cruz Island; pine ( Pinus   sp., Pinaceae   ) from Monterey; and oak ( Quercus   sp., Fagaceae   ) from Santa Barbara. They claimed that these collections appear to represent at least five species but sufficient specimens of only the willow population, which they described as S. hydrophila   , were available at the time. These authors also mentioned that specimens reported as Heterodera   sp. by Nickle (1960) from white pine ( Pinus monticola Dougl.   , Pinaceae   ) in Idaho could be considered as a species of the genus Sarisodera   . Mundo-Ocampo & Baldwin (1983a) considered Populus   ( Salicaceae   ) and Lyonothamnus   ( Rosaceae   ) as hosts of this nematode at the type locality and Santa Cruz Island, respectively. Choi & Kim (2001) found S. hydrophila   around the roots of a deciduous tree ( Fraxinus rhynchophylla   , Oleaceae   ) in Korea. Sturhan (2018) found two populations from rhizosphere soil of an unidentified tree of the family Fagaceae   and wild banana in northern Vietnam that are closely related to S. hydrophila   .

Luc et al. (1973) described S. africana   from guinea grass ( Panicum maximum   , Poaceae   ) from Senegal, but Baldwin & Bell (1985) emended the diagnosis of Sarisodera   to exclude cysts, which do not form in the type species, S. hydrophila   . They then transferred S. africana   to their new genus Afenestrata   . Later, Mundo-Ocampo et al. (2008) synonymized Afenestrata   with Heterodera   .

The histopathology of two populations of S. hydrophila   was examined on willow ( Salix lasiolepis Eenth.   , Salicaceae   ), cottonwood ( Populus fremontii Wats.   , Salicaceae   ), and ironwood ( Lyonothamnus floribundus Gray   , Rosaceae   ) using light microscopy as well as scanning and transmission electron microscopy. S. hydrophila   induces formation of a single uninucleate hypertrophied cell (giant cell) which varies only slightly among the three hosts. Cell wall ingrowths, such as those associated with host responses to certain other plant-parasitic nematodes, were not observed in giant cells induced by S. hydrophila   ( Mundo-Ocampo & Baldwin 1983a).