Open Access. Powered by Scholars. Published by Universities.®
Articles 1 - 5 of 5
Full-Text Articles in Life Sciences
Internode Growth In The Aquatic Macrophyte, Hippuris Vulgaris, Mary Ellen Bland
Internode Growth In The Aquatic Macrophyte, Hippuris Vulgaris, Mary Ellen Bland
Journal of the Minnesota Academy of Science
ABSTRACT -An analysis of internode lengths in the Hippuris stem is represented by a four phase growth curve, The two parameters which infl~ence this pattern of internode lengths are the number of cells per internode and the length of the individual cells within the internode. In the ontogeny of the Hippuris stem cell length and cell number influence internode length in the distal portion of the stem while in the basal portion of the stem cell number is the major factor affecting internode length. The pattern of stem growth in Hippuris differs from that of Elodea in that the cell …
Relation Of Hybridity To The Expression Of Gene Dwarf-1 In Maize Coleoptile Growth, Martin C. Goffinet
Relation Of Hybridity To The Expression Of Gene Dwarf-1 In Maize Coleoptile Growth, Martin C. Goffinet
Journal of the Minnesota Academy of Science
ABSTRACT - The plants used in this study were two inbred strains of maize and their hybrid. Each strain segregated for the mendelian gene dwarf-1, approximating a ratio of three normal to one dwarf, with l 00 per cent penetrance. The length of each of fifty coleoptiles per strain was determined at planting and after emergence of the seedlings until maturity of that organ. The dwarf seedlings were compared with their normal sibs within each strain to determine the degree of expression of the mutant gene. The growth parameters determined from the measurements were: l) total elongation of coleoptile after …
Vegetation And Soils Of The Balsam Fir Habitat Type Of Southern St. Louis County, Andrew F. Robinson Jr.
Vegetation And Soils Of The Balsam Fir Habitat Type Of Southern St. Louis County, Andrew F. Robinson Jr.
Journal of the Minnesota Academy of Science
ABSTRACT - The vegetation and soils of the Abies balsamea/Lonicera canadensis/Cornus canadensis habitat type were characterized from field reconnaissance, soils and plant tissue analysis of six balsam fir stands of Northeastern Minnesota. From nutrient analysis, the concentration of phosphorous and potassium was found to be much higher in living balsam fir needles than in surrounding soils.
The Vessel Member Of Myrica Esculenta Buch.-Ham., Lucy B. Abbe, Ernst C. Abbe
The Vessel Member Of Myrica Esculenta Buch.-Ham., Lucy B. Abbe, Ernst C. Abbe
Journal of the Minnesota Academy of Science
ABSTRACT- The vessel members of Myrica escu/enta from two_ trees, one in Sarawak, the other in Singapore, are described. The differences in habitat as well as in vertical position in each-tree have a minor influence on dimensional characteristics of the vessel members. However, radial position is very significant. Average length of element increases from 600μ, to 950μ, b~tween .05 cm from the pith to 1.75 cm from the pith and then ceases to elongate appreciably. Average diameter over the same radial distance increases from 30μ, to l 05μ. Also over the same radial distance, the average number of perforations of …
Aphanizomenon Elenkinii Kissel, An Interesting Variation, Hibbert Hill
Aphanizomenon Elenkinii Kissel, An Interesting Variation, Hibbert Hill
Journal of the Minnesota Academy of Science
ABSTRACT-A mature bloom of Aphanizomenon elenkinii Kissel, type II, appeared in a local lake in late April, early May, 1971. The appearance of the alga in late spring and changes in the structures of the alga from those previously reported are of interest.