Pythiogeton zizaniae, a new species causing basal stalk rot of water bamboo in Taiwan

Abstract

A new species, Pythiogeton zizaniae, was isolated from diseased water bamboo (Zizania latifolia) in central Taiwan. The organism formed a colony with scanty mycelia and mycelial aggregates on rye-water bamboo medium. Special treatments were required for production of sporangia which were terminal, noncaducous and mostly ovoid. Chlamydospores were absent. The fungus was homothallic. Oogonia produced on V-8 water bamboo medium in water were mostly globose to subglobose and each was attached with a club-shaped, monoclinous antheridium by the base of the oogonium stalk. Oospores were plerotic and globose to subglobose. Py. zizaniae caused death of water bamboo suckers but did not infect seedlings of corn, rice, wheat, sorghum, cucumber, tomato, soybean or water spinach. It also did not affect cucumber and tomato fruit, carrot roots or potato tubers.

Characterization of species associated with Pythium soft rot of ginger and evaluation of Pythium Oligandrum as a biocontrol

“…ramosum was a saprophyte and until recently its pathogenicity on living plants had not been confirmed (Ann et al, 2006). The results from this study allowed us to conclude that Py.…”

“…zeae (Jee et al, 2000) and Py. zizaniae (Ann et al, 2006). Pythiogeton zeae caused basal stalk rot of corn but also attacked tomato, melon fruits and carrot roots (Jee et al, 2000), while Py.…”

“…Pythiogeton zeae caused basal stalk rot of corn but also attacked tomato, melon fruits and carrot roots (Jee et al, 2000), while Py. zizaniae was specific to water bamboo (Zizania latifolia) (Ann et al, 2006).…”

“…The genus was believed to be recalcitrant for research because of its unculturable and unstorable features (Jee et al, 2000). However, Ann et al (2006) and Huang et al (2013) recently reasoned that as long as suitable media and working approaches were implemented, pure cultures can be obtained. In fact, Py.…”

“…zeae and Py. zizaniae which are pathogenic to corn and water bamboo, respectively (Ann et al, 2006;Jee et al, 2000). Pythiogeton ramosum (syn.…”