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The Effect Of Light On The Growth Of Soybean Seedlings, Mary Abrahamsen, T. W. Sudia
The Effect Of Light On The Growth Of Soybean Seedlings, Mary Abrahamsen, T. W. Sudia
Journal of the Minnesota Academy of Science
ABSTRACT- During the course of 13 days of germination and growth, the dry weights of roots, hypocotyl, and epicotyl increased in soybeans grown both in the light and in the· dark. The roots of etiolated 13-day-old soybeans were only 50 per cent of the weights of roots from similar plants grown in the light. The epicotyls of etiolated plants were only 18 per cent of the dry weight of epicotyls of light-grown plants, but the hypocoyl weights of etiolated plants were greater than those grown in the light. Cotyledon dry weight of light-grown plants was reduced by 70 per cent …
Distribution Of Foliar Applied P-32 From The Leaves Of Soybean At Various Ages, George E. Ahlgren, Theodore W. Sudia
Distribution Of Foliar Applied P-32 From The Leaves Of Soybean At Various Ages, George E. Ahlgren, Theodore W. Sudia
Journal of the Minnesota Academy of Science
Transport patterns of phosphorus-32 from the cotyledons, primary leaves and the first five trifoliate leaves of soybean were determined at various ages of these organs. The transport patterns studied indicate the same general pattern for each leaf. There is initially a bidirectional movement from the leaf that increases in its upward component as the leaf becomes older, followed by a sharp drop in the upward component and P'" transport becoming essentially unidirectional downward in the stem. At fruit development, phosphorus-32 transport becomes quite specific for fruit at the axil of a particular leaf. Contiguity to sites of high metabolic activity …
Cytoplasmic Male Sterility And Intergrafts Between Lycopersicon Esculentum And Solanum Pennellii Corr., W. R. Andersen
Cytoplasmic Male Sterility And Intergrafts Between Lycopersicon Esculentum And Solanum Pennellii Corr., W. R. Andersen
Journal of the Minnesota Academy of Science
Attempts to transmit cytoplasmic male sterility through intergrafts between Lycopersicon esculenfum and Solanum pennellii have been unsuccessful. This implies that in these materials, the factor conditioning cytoplasmic male sterility is noninfective. The results of this study and other similar studies by other workers suggest the possibility that grafting might be used as a tool in the classification of cytoplasmic factors affecting mole sterility in plants.
Early Pollen Forcing In A White X Black Spruce Hybrid And Its Parental Species, Lawson L. Winton
Early Pollen Forcing In A White X Black Spruce Hybrid And Its Parental Species, Lawson L. Winton
Journal of the Minnesota Academy of Science
Viable pollen was successfully forced from winter-collected cuttings of white and black spruce, as well as of a hybrid of them. The natural time difference in flowering was overcame, thus providing a tool for interbreeding these species. During forcing, and naturally on the trees, pollen always shed from white spruce first, then the hybrid and finally from black spruce. Using departures from long-range weather averages, a heat-requirement difference was postulated for each species to account for the time difference in their flowering.
Variations In Porphyrin Content In Root Nodules, Marie H. Berg
Variations In Porphyrin Content In Root Nodules, Marie H. Berg
Journal of the Minnesota Academy of Science
The root nodules of a series of legumes were investigated with and without inoculum in sterilized growing material as well as in open soil to find plants that synthesize extractable amounts of porphyrins. These experiments were a preliminary study toward the investigation of the influence of heavy metal salts on the increased production of porphyrins.
The Wild Celery Of Christmas Lake, Hibbert Hill
The Wild Celery Of Christmas Lake, Hibbert Hill
Journal of the Minnesota Academy of Science
The growth and reproduction of Vallisneria as seen and photographed below water in Christmas Lake, Hennepin County, Minnesota, is described. The functions of the water surface film, of wave energy, and of the coiled stem of the pistillate flower, in fertilization is discussed. It is found that many of the plants grow in such depths that fertilization is impossible.
A Comparative Study Of Wood Pulp From The Trunk, Limbs, And Roots Of The Quaking Aspen (Populus Tremuloides), John Vernanth, Raynell Walker, Ann Johnson
A Comparative Study Of Wood Pulp From The Trunk, Limbs, And Roots Of The Quaking Aspen (Populus Tremuloides), John Vernanth, Raynell Walker, Ann Johnson
Journal of the Minnesota Academy of Science
A three part study was conducted on a single quaking aspen tree (Populus tremuloides): ( l) the strength and other physical properties of fiberboard made from the trunk, roots, and limbs using the cold soda pulping process, (2) the strength properties of paper made from the trunk, root, and limb sections using the Kraft pulping process, and (3) a chemical analysis of the trunk, roots, and limbs. Results of these studies indicate there are significant differences in many of the properties of the three parts of the tree, and that parts of the tree other than the trunk possess useful …