Growth requirements of Rhizoctonia repens M 32

Powell, Kenneth B.; Arditti, Joseph

doi:10.1007/bf00491502

Cited by 7 publications

(4 citation statements)

References 23 publications

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“…This complex additive contains many amino acids, several amides , and a number of vitamins (POWELL and ARDITTI 1975;ARDITTl 1982), and its com- (DECEMBER pos1t1on can vary with batch and manufacturer. Therefore, it is not possible to determine from the available information whether S. cernua has any special requirements for one or more organic compounds.…”

Section: Discussionmentioning

confidence: 99%

Seed Germination of North American Orchids. I. Native California and Related Species of Calypso, Epipactis, Goodyera, Piperia, and Platanthera

Arditti¹,

Michaud²,

Oliva³

1981

Botanical Gazette

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Section: Discussionmentioning

confidence: 99%

Seed Germination of North American Orchids. I. Native California and Related Species of Calypso, Epipactis, Goodyera, Piperia, and Platanthera

Arditti¹,

Michaud²,

Oliva³

1981

Botanical Gazette

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“…No vitamin requirement was found in isolate M32 of Rhizoetonia repens studied by Powell and Arditti (1975) but an unidentified Rhizoctonia isolate from Cymbidium sp. was heterotrophic for the thiazole moiety of the thiamin molecule and p-aminobenzoic acid or other substances related to folic acid (Hijner and Arditti, 1973).…”

Section: Introductionmentioning

confidence: 90%

Nutritional Requirements of Orchid Endophytes

Hadley

Ong

1978

New Phytologist

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SUMMARYFour geographically distinct isolates of Tulasnella calospora (Bourdier) Juel exhibited a similar nutritional pattern and utilized a wide range of carbon compounds including cellulose. None would grow on a mineral salts/glucose medium unless undefined materials were present. Growth occurred when a mixture of ten amino acids and ten vitamins was used, and all four isolates were heterotrophic for thiamine and /?-amino benzoic acid. They were also exacting for nitrogen. Growth on ammonium ions was very limited but asparagine, glycine and urea were good nitrogen sources while glutamine, arginine and alanine were less adequate.Isolates of Ceratobasidium cornigerum (Bourd.) Rogers and a Rhizoctonia sp. were selfsufficient for vitamins and grew well on nitrate or other nitrogen sources tested. They were more efficient than Tulasnella calospora isolates in their nitrogen economy.

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“…The culture tubes contained agar slopes consisting of 15 mL of basal medium ( Table 3). To meet possible demands for vitamins and amino nitrogen of both orchid species Bulard 1975, 1979; van Waes and Debergh 1986) and mycorrhizal fungi (Stephen and Fung 1971;Powell and Arditti 1975;Hadley and Ong 1978) all cultures were supplied with 1 g . L-I yeast extract.…”

Section: Culture Conditions and Experimental Designmentioning

confidence: 99%

Effects of mycorrhizal fungi on in vitro nitrogen response of some Dutch indigenous orchid species

Dijk¹,

Eck²

1995

Can. J. Bot.

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The effect of mycorrhizal infection on the response to mineral nitrogen was studied in Orchis morio L., Dactylorhiza praetermissa (Druce) So6 var. junialis (Verrnln.) Sengh., Dactylorhiza rnajalis (Reichb.) Hunt & Summerh., and Dactylorhiza incarnata (L.) So6, using two strains of Ceratorhiza sp. and two of Epulorhiza repens (Bernard) Moore as mycorrhizal symbionts. Both types of endophyte appeared to be able to stimulate orchid growth at relatively low nitrogen availability in the culture medium. The Ceratorhiza strains decreased nitrogen tolerance of associated orchid protocorms and had pronounced negative effects on the growth and survival of D. majalis and D. incarnata at high concentrations of ammonium nitrate. Such effects did not occur in symbioses involving the Epulorhiza strains. Within orchid species, differences were observed in the extent to which fungal strains stimulated growth. The Ceratorhiza isolates were incompatible with 0. morio while the Epulorhiza strains were generally less efficient for Dactylorhiza spp.Resume : En utilisant deux souches de Ceratorhiza sp. et deux de 1'Epulorhiza repens (Bernard) Moore, comme champignons rnycorhiziens symbiotiques, les auteurs ont CtudiC les effets de la colonisation rnycorhizienne sur la rCaction de I'Orchis mori L., du Dactylorhiza praetermissa (Druce) Soo var. junialis (Vermin.) Sengh., du Dactylorhiza majalis (Reichb.) Hunt & Summerh. et du Dactylorhiza incarnata (1.) Soo, h la nutrition azotCe. Les deux types d'endophytes sernblent capables de stimuler la croissance des orchidCes en prCsence de quantitC relativement faibles d'azote disponible dans le milieu de culture. Les souches de Ceratorhiza diminuent la tolCrance i l'azote des protocormes d'orchidCes associCs, et exercent des effets nCgatifs marquCs sur la croissance et la survie du D. majalis et du D. incarnata aux fortes concentrations de nitrate d'arnmonium. De tels effets ne se retrouvent pas dans les symbioses impliquant les souches d'Epulorhiza. Pour une espbce d'orchidCes donnCe, on observe des diffkrences dans le degrC de stimulation exercC par les souches fongiques. Les isolats du Ceratorhiza sont incompatibles avec 1'0. mori, alors que les souches d'Epulorhiza sont gCnCralement rnoins efficaces pour les Dactylorhiza spp.

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Growth requirements of Rhizoctonia repens M 32

Abstract: Rhizoctonia repens M 32, a mycorrhizal isolate from Orchis militaris requires both a carbohydrate (glucose or sucrose) and an amino acid (aspartic acid, glycine, serine, or glutamic acid) for growth. The fungus does not require an exogenous supply of vitamins in vitro.

Cited by 7 publications

References 23 publications

Seed Germination of North American Orchids. I. Native California and Related Species of Calypso, Epipactis, Goodyera, Piperia, and Platanthera

Seed Germination of North American Orchids. I. Native California and Related Species of Calypso, Epipactis, Goodyera, Piperia, and Platanthera

Nutritional Requirements of Orchid Endophytes

Effects of mycorrhizal fungi on in vitro nitrogen response of some Dutch indigenous orchid species

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