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- Title
The Nitrogen Nutrition and Vitamin Requirement of Ophiostoma pini.
- Authors
Mathiesen, Aino
- Abstract
1. O. pini is partially heterotrophic with respect to aneurine and biotin. In favourable substrates, such as nitrates, especially Ca(NO3)2. it is able to produce some mycelium and sterile perithecia after the addition of Na, Zn, Cu, Fe, B, Mn, and Mo, without any vitamins. 2. By adding aneurine and biotin a normal growth, pigmentation, and perithecia production occurs on media composed of glucose, some nitrate, KH2PO4, and MgSO4. No other metals or compounds were required. 3. Malt extract in small amounts (0.01 per cent) is not able to produce normal growth on any of the nitrogen media tested. After the addition of the named metals a normal growth occurs on the nitrate media. 4. The pigment production is not dependent on the quantity of the mycelium produced nor on the age of the cultures. In some media, such as NH4Cl, the same amounts of mycelium are formed as on nitrates, but are entirely colourless in the former case. Metals bad no influence on the pigment formation. In normally pigmented cultures, only K and Mg or Ca, K and Mg, or Na, K and Mg were present. The addition of further metals caused no pigmentation in colourless cultures. Pigment production is apparently closely bound to the assimilation process and to some oxidation process. 5. Decreasing the concentrations of the solutions did not reestablish the capacity of synthesis of either of the vitamins. 6. Biotin can be completely replaced by aspartic acid or oleic acid on nitrate media.
- Subjects
OPHIOSTOMA; OPHIOSTOMATACEAE; SPHAERIALES; PYRENOMYCETES; VITAMINS; NUTRITION
- Publication
Physiologia Plantarum, 1950, Vol 3, Issue 1, p93
- ISSN
0031-9317
- Publication type
Article
- DOI
10.1111/j.1399-3054.1950.tb07496.x