Effects of Vitamins on Germination and Growth of Orchids

Noggle, G. R.; Wynd, F. L.

doi:10.1086/335156

Cited by 22 publications

(7 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Niacin is the only vitamin repeatedly shown to enhance orchid germination and seedling growth (Arditti, 1967a, b;Arditti and Harrison, unpublished;Mariat, 1948Mariat, , 1952Noggle and Wynd, 1943;Schaffstein, 1938Schaffstein, , 1941Withner, 1959). Therefore, it has often been suggested that in addition to transporting nutrients (Smith, 1966(Smith, , 1967, mycorrhizal fungi also provide orchids with niacin.…”

Section: Discussion-mentioning

confidence: 99%

Orchid Mycorrhiza: Vitamin Production and Requirements by the Symbionts

Hijner

Arditti

1973

American Journal of Botany

View full text Add to dashboard Cite

JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org. This content downloaded from 131.172.36.29 on Thu, 31 Dec 2015 18:23:15 UTC All use subject to JSTOR Terms and ConditionsAmer.AB S TRA CT A Rhizoctonia species isolated from Cymbidium has been cultured successfully on a defined medium consisting of minerals, sugar, thiamine, and folic acid. Thiamine can be replaced by its thiazole component, which is probably produced by germinating orchids. The fungus apparently produces the pyrimidine moiety of thiamine, a compound which may enhance growth of certain orchid seedlings. Niacin is also provided by the fungus. Para-aminobenzoic acid, a constituent of folic acid, produced and released by orchid seeds, can satisfy the vitamin requirement of the fungus. These findings point to the possibility that orchids and their fungi may have coevolved with respect to vitamin requirements. The data also suggest that exchanges of vitamins or their components between orchids and endophytes are important aspects of the symbiotic relationship.

show abstract

Section: Discussion-mentioning

confidence: 99%

Orchid Mycorrhiza: Vitamin Production and Requirements by the Symbionts

Hijner

Arditti

1973

American Journal of Botany

View full text Add to dashboard Cite

show abstract

“…He suggested that the upset of carbohydrate metabolism which is a symptom of the lack of vandophytin was due to its activity as a constituent of the molecule of codehydrase. Noggle & Wynd (1943) have also demonstrated that in some cases where nicotinic acid stimulates growth of orchid seeds, pyridoxine is also partially active. In this respect their work is a partial confirmation of the views of Schatfstein.…”

Section: {A) Seed Germination and Seedling Growth Of Orchidsmentioning

confidence: 91%

Recent Progress in the Study of Endotrophic Mycorrhiza

Harley

1950

New Phytologist

View full text Add to dashboard Cite

“…After 96 h only 0-01 % of i*C from aspartate was incorporated into the vitamin by seedlings (Table 3). Wynd, 1943;Bahme, 1949;Mariat, 1949Mariat, , 1952Arditti, 1967a; for reviews see Arditti, 1967bArditti, , 1979Arditti and Harrison, 1977). Tryptophan inhibits the growth of seedlings at the protocorm stage, but promotes that of older, leaf-bearing ones (Arditti, 1967a).…”

Section: Glycerol and Aspartic Acid Experimentsmentioning

confidence: 99%

“…In most instances, the effects of vitamins have been inconclusive at best. Niacin is the only exception in that it has enhanced the growth of seedlings of several species (Schaffstein, 1938(Schaffstein, , 1941Noggle and Wynd, 1943;Bahme, 1949;Mariat, 1949Mariat, , 1952Arditti, 1967b; for reviews see Arditti, 1967aArditti, , 1979Arditti and Harrison, 1977) and may be provided by some mycorrhizas (Hijner and Arditti, 1973). Because of this, orchid seedlings are a good system for the study of niacin biosynthesis in plants.…”

Section: Introductionmentioning

confidence: 99%