Spore dispersal of the sugarcane smut (Ustilago scitaminea)

Sreeramulu, T.; Vittal, B. P. R.

doi:10.1016/s0007-1536(72)80158-x

Cited by 6 publications

(3 citation statements)

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“…Upon deposition, the hydrophobic surface also favours fixation of the spore to a hydrophobic target, such as the waxy cuticle of a leaf surface (Clement et ai, 1994). The importance of direct (wash-out, splash liberation) and indirect (bellows, tap, and puff liberation, associated strong winds) effects of rain has been shown by Sreeramulu (1962) and Sreeramulu and Vittal (1972), who found that frequent rain and strong winds reduce the length of the dissemination period because the supply of spores is depleted earlier.…”

Section: Dispersal Together With Host Organsmentioning

confidence: 99%

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Spore Liberation and Dispersal in Smut Fungi*

Piepenbring

Hagedorn²,

Oberwinkler

1998

Botanica Acta

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Teliospores are the most important diaspores of smut fungi, albeit not the only ones, The role of basidia. basidiospores. secondary spores. yeast cells. and infected parts of the host for dispersal has often been neglected. Many smut species have soral structures like galls. perldla, and elaters, which cause teliospores to be liberated over prolonged periods. This increases the chance that at least some spores are released under favourable wet climatic conditions and while host plants are susceptible.In this review. the diversity of dispersal units as well as vectors of smut fungi are presented. The importance of timing of diaspore liberation, flexibility in dispersal strategies, and the genetic and evolutionary implications of dispersal strategies of smut fungi are discussed.The general considerations are complemented by examples based on original field and laboratory observations: peridia of Farysia corniculata and certain species of Sporisorium expose the spore mass by hygroscopic movement under wet conditions (hygrochasy) favourable for teliospore germination and infection of a host plant. Basidia with firmly attached basidiospores liberated from spore balls of Doassansiopsis deformans. branched basidiospores of Rhamphospora nymphaeae. needleshaped basidiospores of species of Entyloma. folded basidiospores of Mycosyrinx cissi, and stellate groups of yeast cells of Trichocintractia utricu/icola show enlarged surfaces. which are advantageous for dispersal in water. Galls filled with spore balls of Doassansiopsis Iimnocharidis and witches' brooms formed by spikelets infected by Cintractia standleyana separate from the host and fall into water where they are dispersed.617), d) Juncus bufonius L. with a gall (arrow) caused by Entorrhiza casparyana (Magnus) Lagerh. Teliospores are located inside the cells of the root gall (Costa Rica, MP 742). e) Cintractia scleriae (DC) Ling on Rhynchospora corymbosa (L.) Britt. The sori envelop peduncles of the sterile inflorescence. Note remains of white peridia adjacent to the black telispore mass (Costa Rica, MP 93; photo R. Berndt). f) Sphacelotheca d. hydropiperis (Schum.) de Baryon Polygonum punctatum Elliot.The teliospore mass is enclosed by sori with central columellae and peridiallobes replacing flowers (Costa Rica, MP 142; photo R. Berndt). Dispersal in Smut FungiBot. Acta 111 (1998) 445 Figs.la-f

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Section: Dispersal Together With Host Organsmentioning

confidence: 99%

“…5f). Similarly, although species of Ustilago and many other genera do not have spore balls, their spores are often dispersed in clumps (U. scitaminea, 44% of spores or 11.5 %of dispersal units were in clumps of 5 to 8, Sreeramulu an Vittal, 1972;U. avenae, clumps of20 to 200, Mills,1967).…”

Section: Dispersal In Smut Fungimentioning

confidence: 99%

Spore Liberation and Dispersal in Smut Fungi*

Piepenbring

Hagedorn²,

Oberwinkler

1998

Botanica Acta

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“…The whip-like structure harboring the teliospores emerges two months after inoculation in highly susceptible varieties (Legaz et al, 2011). Spores are carried by the wind over a distance of 100 meters from the source whip and by splash of rainfall water in the soil (Hoy et al, 1991;Sreeramulu & Vittal, 1972). Despite the potential scattering over long distances, we found no association between genetic and geographic distances among isolates ( Fig.…”

Section: 2) Relationship Among Brazilian and Argentine Strainsmentioning

confidence: 66%