Gilbertella persicaria is a morphologically distinct member of the Choanephoraceae, a monophyletic family within the order Mucorales (Walther et al. 2013). This species has been reported as a post-harvest soft rot pathogen of several fruits, including tomato (Mehrotra 1964), peaches (Ginting et al. 1996), jambolan (Syzygium cumini; Pinho et al. 2014), dragon fruit (Hylocereus costaricensis; Guo et al. 2016) and papaya (Carica papaya L.; Cruz-Lachica et al. 2016). Colonies of Gilbertella form a white mycelium that darkens as the black multispored sporangia are formed during the asexual phase of the life cycle. The sporangia are distinctive in that the wall possesses a circumscissile zone of dehiscence (Fig. 1), a trait shared by all members of the Choanephoraceae. Sporangia at maturity are filled with striate sporangiospores that bear hair like polar appendages (Fig. 2). When compatible strains of this self-sterile or heterothallic zygomycete fuse during the sexual cycle, they produce black, ornamented zygospores between opposed suspensors (Figs. 3-4). The whole-genome of Gilbertella persicaria CBS 190.32 (= NRRL 2700), the ex-type strain, was sequenced as part of the 1000 Fungal Genome Project to provide a representative of the Choanephoraceae to help elucidate the evolution of early diverging fungi.
References:
Cruz-Lachica I, Zequera I, Garcia-Estrada RS, Carrillo-Fasio JA,
Leon-Felix J, Allende-Molar R. 2016. First report of
Gilbertella persicaria causing papaya fruit rot. Plant
Disease 100:227.
Ginting C, Zehr EI, Westcott SW. 1996. Inoculum sources and
characterization of isolates of Gilbertella persicaria
from peach fruit in South Carolina. Plant Disease
80:1129–1134.
Guo LW, Wu YX, Mao ZC, Ho HH, He YQ. 2016. Storage rot of dragon
fruit caused by Gilbertella persicaria. Plant Disease
100:227.
Mehrotra MD. 1964. Fruit rot of tomato caused by Gilbertella
persicaria. Sydowia 17:17–19.
Pinho DB, Pereira OL, Soares DJ. 2014. First report of
Gilbertella persicaria as the cause of soft rot of fruit
of Syzygium cumini. Australasian Plant Disease Notes
9:143.
Walther G, Pawowska J, Alastruey-Izquierdo A, Wrzosek W,
Todriguez-Tudela JK, Dotatabadi S, Chakrabarti A, de Hoog GS. 2013.
DNA barcoding in Mucorales: an inventory of biodiversity. Persoonia
30:11–47.