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Plant Sciences

Journal of the Minnesota Academy of Science

1961

Articles 1 - 9 of 9

Full-Text Articles in Life Sciences

Arisaema Triphyllum, Jack-In-The-Pulpit, In Minnesota, Especially At The Cedar Creek Natural History Area, Sadao Sakamoto Jan 1961

Arisaema Triphyllum, Jack-In-The-Pulpit, In Minnesota, Especially At The Cedar Creek Natural History Area, Sadao Sakamoto

Journal of the Minnesota Academy of Science

Arisaema triphyllum (L.) Schott is a member of the Araceae, or Arum family and is distributed widely in temperate regions of North America, from Nova Scotia to Florida, Ontario, Minnesota, Kansas. and Louisiana. Various aspects of this species have been investigated by many botanists since the last decade of the 19th century.

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The Influence Of Soil On Germination Of Fungus Spores, Roy D. Wilcoxson Jan 1961

The Influence Of Soil On Germination Of Fungus Spores, Roy D. Wilcoxson

Journal of the Minnesota Academy of Science

Soil prevents spores of many fungi from germinating, according to reports from different parts of the world. Thus Welsh soils were reported to be fungistatic to several fungi (Dobbs, 1953). Jackson (1958) made a similar report about Nigerian soils. In Minnesota Fusarium oxysporium f. lini (Bolley) Sny. and Han. persists in soil devoid of host debris but Helminthosporium sativum P.K.B. does not (Anwar, 1949). A more thorough study of the influence of Minnesota soils on germination of fungus spores would provide additional information on ecology of fungi and might suggest control measures for certain pathogens. Such a study may be …

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Staining Of Barley Kernels By Bacteria, Richard W. Lutey Jan 1961

Staining Of Barley Kernels By Bacteria, Richard W. Lutey

Journal of the Minnesota Academy of Science

The demand for beer light in color has placed emphasis on the need to regulate malting as to produce, naturally and consistently, malts that are light in color (Bawden and Artis 1954), and malt having a clean pleasing aroma (Hopkins and Krause 1937). Even when bright barley, relatively free of field fungi, is malted, the finished product tends to be darker in color than the starting materials; in some cases to the extent that bleaching with sulfur dioxide gas is required (Hopkins and Krause 1937; Oesting et al. 1949). The cause of this discoloration is not known, but bacteria might …

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The Excised Embryo Culture Method For Controlled Seedling Growth Of The Sweet Fern, Comptonia Peregrina, Of The Family Myricaceae, Helen E. Heino Jan 1961

The Excised Embryo Culture Method For Controlled Seedling Growth Of The Sweet Fern, Comptonia Peregrina, Of The Family Myricaceae, Helen E. Heino

Journal of the Minnesota Academy of Science

Sweet fern, Comptonia peregrina (L.) Coult. according to Fernald (1950), in older literature often referred to as Myrica asplenifolia L. or Comptonia asplenifolia (L.) Ait., is the only species in this genus. It is a low branching, stoloniferous shrub up to a meter and a half tall, with linear-lanceolate leaves that are regularly and deeply pinnatifid giving a fern-like appearance, though it is not at all related to the ferns. It has a characteristic sweet resinous scent. The plants are monoecious or dioecious, flowers are in catkins; staminate catkins are slender and cylindrical; pistillate catkins become a spherical bur-like fruit. …

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A Study Of Annual Accumulation Of Organic Matter In A Five-Year Old Larix Laricina, Vincent A. Heig Jan 1961

A Study Of Annual Accumulation Of Organic Matter In A Five-Year Old Larix Laricina, Vincent A. Heig

Journal of the Minnesota Academy of Science

The purpose of this study is to evaluate a method of calculating the annual accumulation of xylem in shoot system of a tree. Larix laricina was ideally suited for this study because of several structural traits. Its terminal bud scale scars or girdles remain visible up to approximately eight years after their formation and make it possible to differentiate between each year's addition in stem length. It has one dominant leader bud which forms a straight main axis facilitating the differentiation between axial and secondary branch growth. Larix laricina also has growth rings which can be easily identified when cross …

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Relations Between Certain Vegetational Characters And Ground Water Level In A Mixed Hardwood Community In East-Central Minnesota, J. P. Lindmeier, J. R. Tester, D. W. Warner Jan 1961

Relations Between Certain Vegetational Characters And Ground Water Level In A Mixed Hardwood Community In East-Central Minnesota, J. P. Lindmeier, J. R. Tester, D. W. Warner

Journal of the Minnesota Academy of Science

This report describes the vegetation of a mixed hardwood community in terms of species composition, frequency, areal cover and height classes in relation to ground water level. An attempt is made to show how known changes in ground water level during the past 25 years have brought about changes in the vegetation.

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Pollination Studies With Native Minnesota Pyrola And Moneses Species, Lawrence C.W. Jensen Jan 1961

Pollination Studies With Native Minnesota Pyrola And Moneses Species, Lawrence C.W. Jensen

Journal of the Minnesota Academy of Science

The closely related ericaceous ericaceous genera, Pyrola L. and Monese Salisb. ex. Gray, are common throughout the world in coniferous woods of north temperate areas. Characteristically they are small herbaceous plants with basal evergreen leaves and decorative inflorescences of green, white or pink flowers appearing in the early summer. In Minnesota there are five species of Pyrola-P. asarifolia Michx., P. elliptica Nutt., P. rotundifolia L., P. secunda L., and P. virens Schweigger. There is also the one species of Moneses, M. uniffora (L.) Gray. All these occur together in abundant quantities and bloom at approximately the same time. Consequently they …

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Fruit And Seed Project Of The Cedar Creek Natural History Area, Frieda L. Wertman, D. B. Lawrence Jan 1961

Fruit And Seed Project Of The Cedar Creek Natural History Area, Frieda L. Wertman, D. B. Lawrence

Journal of the Minnesota Academy of Science

The program was initiated with the support of the Graduate School of the University of Minnesota in May, 1960 through the interest of Dean T. C. Blegen. There are four major objectives: (1) To establish a collection of ripe fruits and seeds to provide a permanent reference file of the entire seed plant flora of the area newly mapped through a grant from the National Science Foundation. (2) To prepare duplicate sets of standard herbarium mounts of material with ripe disseminules, one set for the laboratory at Cedar Creek, the other for the Herbarium of the Department of Botany of …

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Light Reflectivity As An Index Of Chlorophyll Content And Production Potential Of Various Kinds Of Vegetation, J. R. Bray, J. E. Sanger Jan 1961

Light Reflectivity As An Index Of Chlorophyll Content And Production Potential Of Various Kinds Of Vegetation, J. R. Bray, J. E. Sanger

Journal of the Minnesota Academy of Science

As a part of the study, "Energy relations of terrestrial ecosystems," being carried on at Cedar Creek Natural History Area, and generously supported by the Hill Family Foundation, the University of Minnesota, and the National Research Council of Canada, an attempt was made in the summer of 1960 to discover the relationship between the chlorophyll content of various plant communities and the visible albedo, that is the ratio of the amount of light reflected from the landscape to the total amount falling upon it. ·

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