Botany Commons^™

The Influence Of Internal Moisture Deficit On Translocation, Sven Egenolf Wihrheim

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The reduced growth of plants under conditions of moisture stress has been attributed to reduced turgor necessary for cell enlargement and to reduced photosynthesis often found in wilted or moisture stressed plants. Reduced translocation is rarely mentioned as a factor in reduced plant growth under limited moisture. This is rather surprising, since the Münch pressure flow hypothesis would require a turgor pressure gradient between leaves and receiving organs before any translocation of sugars could occur. Such a turgor pressure gradient would be reduced with increasing internal moisture deficit and would appear to become zero when the leaves wilt. If this …

Claytonia Virginica L., Virginius Heber Chase

Specimens by Name

No abstract provided.

Phoradendron Nutt., George Neville Jones

Specimens by Name

No abstract provided.

Side-Oats Grama In The Central Great Plains, L. C. Newell, R. D. Staten, E. B. Jackson, E. C. Conard

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Side-oats grama, Bouteloua curtipendula (Michx.) Torr., is a warm-season grass distributed widely in the native grasslands of continental United States. It has long been considered a valuable forage grass. Its habit of growth and favorable seed-producing qualities have suggested its suitability for domestication as a pasture crop. Investigations which contributed to the domestication of side-oats grama were conducted at the Nebraska Agricultural Experiment Station in a 12-year period, 1948 to 1960. Field trials were carried on to evaluate forage and seed yields of selected strains and varieties from different regions. The photoperiodic responses of these strains were studied under controlled …

End Matter, Vol. 2 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

A Comparative Study Of The Species Of The Genus Crotaphytus Holbrook (Iquanidae), Wilbur Gerald Robison Jr., Wilmer W. Tanner

Brigham Young University Science Bulletin, Biological Series

The anterior musculature of C. wislizeni and C. collaris is described in detail and compared. Size and number relationships of the skull and its component bones, the sternum, the clavicle, the parts of the hyoid, the general body form, certain scales and teeth, and the eggs per clutch were determined for large samples of both species and then statistically compared. The general character of many structures is also compared and notes are made on C. reticulatus.

The differences encountered by this study, as well as the valid ones of those listed by Smith (1946:158–159) are not considered to be important …

Front Matter, Vol. 2 No. 1

Brigham Young University Science Bulletin, Biological Series

No abstract provided.

Occurrence And Severity Of The Viruses Of Strawberry In Minnesota, T. H. King, Stephen C.Y. Liu, R. L. Skiles

Journal of the Minnesota Academy of Science

Approximately 900 plants of commercially grown strawberries of 45 varieties and experimental seedling selections were collected from various parts of the state of Minnesota and indexed for the presence of viruses. Their presence in these plants was demonstrated by the appearance of symptoms in the indicator plant, Fragaria vesca L., after they were inarch-grafted. 93 % of the plants indexed were virus-infected. Based on symptoms, the viruses have been classified into 14 symptomtypes. It was found that mottle and mild yellow-edge were the two dominant viruses, whereas crinkle and vein chlorosis were of rare occurrence. There was no indication that …

The Effect Of O-Phenylphenol On The Growth Of Some Fungi Occurring In Wood, William Merrill, D. W. French

Journal of the Minnesota Academy of Science

It is often difficult or impossible to obtain cultures of wood rotting fungi from pieces of decayed wood placed on agar media, because other fungi present in the wood grow out rapidly and hide or suppress the fungus or fungi responsible for the decay. Trichoderma viride Pers. occurs very commonly in decayed wood, grows rapidly on agar media suitable for the isolation of wood-rotting fungi, and makes the isolation of wood decay fungi difficult. Russell (2) reported that Ophenylphenol added to the culture medium at the rate of 0.06 grams per liter would inhibit the growth of Trichoderma but permit …

Species Distribution In A Prairie In Relation To Water-Holding Capacity, Max L. Partch

Journal of the Minnesota Academy of Science

Plants are seldom distributed uniformly, if an area of much size is considered, since even the smallest environmental differences may affect the success of some species. This study is an attempt to correlate the nonrandom distribution of plants in one prairie area with one measurable environmental factor, namely waterholding capacity. The well known phenomenon of zonation concerns a marked change in environment and therefore in species, and, as seems quite obvious, therefore also a change in plant communities. What might seem more obvious than real, however, is the boundary between any two of these so-called communities. It is possible that …

The Typification Of Zauschneria Californica, Peter H. Raven

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

New Taxa And Recombinations In Oenothera (Anogra), William M. Klein

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Wood Anatomy Of Senecioneae (Compositae), Sherwin Carlquist

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

The Biosystematics Of Scrophularia In Western North America, Richard J. Shaw

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Chromosomes Of Salvia: Section Audibertia, Carl Epling, Harlan Lewis, Peter H. Raven

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Variation And Hybridization In Southern California Populations Of Diplacus (Scrophulariaceae), Richard M. Beeks

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Pollination And Evolution In Pedicularis (Scrophulariaceae), Elizabeth F. Sprague

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

A Key Character In Iris For Separating The Sibiricae And The Californicae, Lee W. Lenz

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

A New Basidiobolus That Forms Microspores, Richard K. Benjamin

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Polythene For Fruit Growers, Frank Melville

Journal of the Department of Agriculture, Western Australia, Series 4

ALMOST everybody has some contact with that versatile plastic polythene—or polyethylene as the Americans prefer to call it.

It may be as a wrapper for a shirt purchased at the city store, as a vegetable pack in the supermarket, as a protection for new concrete or in a multitude of other uses in industry, commerce and the home.

Relative Susceptibility To Fungus Infection Of Liberty Barley Kernels With Albino And Normal Lemmas, Richard W. Lutey

Journal of the Minnesota Academy of Science

In recent years the demand by the malting industry for plump, non-discolored barley has increased, as is evident from the premium market prices paid for such grain ( 4) . There is evidence from laboratory research ( 6), and from practical malting and brewing experience that bright barley is most desirable and suitable for malting purposes ( 5). It has been suggested that kernel discoloration is related to the number and kinds of micro-organisms in and on the kernels (2, 3, 4) and that barley varieties differ in their susceptibility to invasion by these micro-organisms (3). At present, Liberty barley …

Farm Flora Sancturies, Robert Dunlop Royce

Journal of the Department of Agriculture, Western Australia, Series 4

NOW that several species of native plants have become totally extinct and many more are becoming rare almost to the point of extinction, interest in the scientific and aesthetic potential of the West Australian flora is awakening.

A Check-List Of The Species Of Eleodes And Descriptions Of New Species (Coleoptera-Tenebrionidae), Vasco M. Tanner

Great Basin Naturalist

No abstract provided.

Humulus Lupulus L., George Neville Jones

Specimens by Name

No abstract provided.

Lysimachia Terrestris (L.) Britton, Sterns & Poggenb., John E. Ebinger

Specimens by Name

No abstract provided.

Acer Rubrum Wats., J. D. Bilbruck

Specimens by Name

No abstract provided.

Humulus Lupulus L., Virginius H. Chase

Specimens by Name

No abstract provided.

Lysimachia Ciliata L., John E. Ebinger

Specimens by Name

No abstract provided.

Cannabis Sativa L., Leland Jacob Gier

Specimens by Name

No abstract provided.

Verbena Hastata L., John E. Ebinger

Specimens by Name

No abstract provided.