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Articles 9151 - 9180 of 10754
Full-Text Articles in Botany
Aplectrum Hyemale (Muhl. Ex Willd.) Torr., John E. Ebinger
Aplectrum Hyemale (Muhl. Ex Willd.) Torr., John E. Ebinger
Specimens by Name
No abstract provided.
Vitis Riparia Michx., Loy R. Phillippe
Forestiera Acuminata (Michx.) Poir., Raymond Athey
Forestiera Acuminata (Michx.) Poir., Raymond Athey
Specimens by Name
No abstract provided.
Montia Perfoliata (Donn Ex Willd.) T.J. Howell, Hiram F. Thut
Montia Perfoliata (Donn Ex Willd.) T.J. Howell, Hiram F. Thut
Specimens by Name
No abstract provided.
Punica Granatum L., Douglas Wood
Acer Negundo L., John E. Ebinger
Acer Negundo L., John E. Ebinger
Acer Negundo L., John E. Ebinger
Verbena Canadensis Britton, John E. Ebinger
Viola Pedunculata Torr. & Gray, Douglas Wood
Effects Of Dmso And Propham On Mitosis In Root Tips Of Secale Cereale, Max Rosequist
Effects Of Dmso And Propham On Mitosis In Root Tips Of Secale Cereale, Max Rosequist
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
DMSO (dimethyl sulfoxide) and propham (isopropyl carbanilate) were investigated to determine their effect singly and in combination on mitoses in rye (Secale cereale) root tip cells. Root tips were prepared for observation by the paraffin and aceto-carmine squash methods. Results showed DMSO caused the following abnormalities: arrested metaphases, multipolar spindles, multinucleate cells, stickiness, shortened chromosomes, and mitotic inhibition. Cells from propham treated root tips exhibited the same abnormalities as those treated with DMSO. In addition, propham treatments resulted in polyploid cells and chromosome granulation. In combination, DMSO and propham caused all the abnormalities mentioned above except polyploidy. In …
Polymerization Of Tobacco Mosaic Virus, Fabian Crespo V.
Polymerization Of Tobacco Mosaic Virus, Fabian Crespo V.
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
An organic chemical condensing reagent, 1-cyclohexyl-3-(2-morpholinoethyl)-carbodiimide metho-p-toluene sulfonate (CMC) was tested for effectiveness in inducing polymerization of short lengths of tobacco mosaic virus (TMV) nucleoprotein particles isolated from systemically infected Turkish tobacco leaves. It appeared that the chemical induced the formation of phosphodiester linkages between the viral RNA helices in the joining nucleoprotein fragments. Because the polymerization reaction liberates a hydroxyl ion with each joining event the kinetics of the polymerization can be followed with time using a pH meter. The number of hydroxyl ions liberated is equal to the number of polymerizations. Physical evidence of polymerization was obtained by …
Low Temperature Modification Of Cell Ultrastructure In Hardy And Nonhardy Grass Species, Steven L. Kimball
Low Temperature Modification Of Cell Ultrastructure In Hardy And Nonhardy Grass Species, Steven L. Kimball
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Studies were conducted to determine the influence of different temperatures (25, 10, 0, or -5 C) upon plant growth and cell ultrastructure, and to determine if physical changes within cells might block growth activities even though individual biochemical processes were potentially active.
Secale cereale L. was found to be most hardy, followed by Cynodon dactylon (L) Pers. and Paspalum notatum Flugge, whose responses were quite similar. Secale grew normally at 25 and 10 C, with reduced activity at 0 C and a slight delay before resuming normal growth when placed at 25 C again. All three species were killed at …
Investigations Of Unusual Curly Top Symptoms In Grafted Tomato Plants And Early Leafhopper Feeding Effects Upon Tomato Seedlings, Donald Eldon Gardner
Investigations Of Unusual Curly Top Symptoms In Grafted Tomato Plants And Early Leafhopper Feeding Effects Upon Tomato Seedlings, Donald Eldon Gardner
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
To determine possible unusual effects of resistant plants upon symptom expression of curly top disease in susceptible tomato plants (Lycopersicon esculentum Mill.), tops of susceptible plants were grafted to lower stems and roots of resistant plants and inoculated. The resistant plants used were wild relatives of L. esculentum: L. peruvianum var. dentatum Dun. and L. peruvianum var. humifusum C. H. Mul. Reciprocal grafts, in which tops of dentatum plants were grafted to lower stems and roots of L. esculentum, were also made and inoculated.
External symptoms in the grafted plant tops were observed and compared with those of nongrafted, …
Fraxinus Caroliniana Mill., R. Dale Thomas
Viola Rafinesquii Greene, John E. Ebinger
Chionanthus Virginicus L., R. Dale Thomas
Viola Rostrata Pursh, Edsel Ray Lafferty
Viola Rafinesquii Greene, John E. Ebinger
Forestiera Acuminata (Michx.) Poir., John E. E. Ebinger
Forestiera Acuminata (Michx.) Poir., John E. E. Ebinger
Specimens by Name
No abstract provided.
Glandularia Canadensis (L.) Nutt., R. Dale Thomas, Dale Family
Glandularia Canadensis (L.) Nutt., R. Dale Thomas, Dale Family
Specimens by Name
No abstract provided.
Viola Pedunculata Torr. & Gray, Hiram F. Thut
End Matter, Vol. 13 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
End Matter, Vol. 13 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 13 No. 2
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
Front Matter, Vol. 13 No. 3
Brigham Young University Science Bulletin, Biological Series
No abstract provided.
A Taxonomic Revision Of The Weevil Genus Tychius Germar In America North Of Mexico (Coleoptera: Curculionidae), Wayne E. Clark
A Taxonomic Revision Of The Weevil Genus Tychius Germar In America North Of Mexico (Coleoptera: Curculionidae), Wayne E. Clark
Brigham Young University Science Bulletin, Biological Series
A study of morphological characters of 4,000 adult weevils used in preparing a key and descriptions indicates there are fifteen North American species in the genus Tychius Germar. Adults occur on plants in the genera Astragalus, Baptisia, Hedysarum, Lotus, Lupinus, and Oxytropis.
The genus is divided into two species groups. The T. sordidus group appears to have representatives in the Old World fauna, but the T. semisquamosus group is probably native to North America. New names, Tychius caesius, and T. hirsutus are proposed for T. armatus Green, 1920 (not Tournier, 1873), and T. hirtellus LeConte, 1876 (not Tournier, 1873) respectively. …
Notes On Eriogonum - Vi : A Revision Of The Eriogonum Microthecum Complex (Polygonaceae), James L. Reveal
Notes On Eriogonum - Vi : A Revision Of The Eriogonum Microthecum Complex (Polygonaceae), James L. Reveal
Brigham Young University Science Bulletin, Biological Series
This revision discusses seven closely related species of Eriogonum (Polygonaceae) found in the western United States of North America. One of the two major species, E. microthecum, is composed of nine varieties which range over a wide area of the Far West. The other major species, E. effusum, is found over a more restrictive geographical range mainly east of the Continental Divide. The remaining five species are primarily restricted to the Colorado-Green river drainage basin of Utah, Colorado, New Mexico, and northern Arizona. Together these entities form the core of a group of plants known as Section Corymbosa. …