Life Sciences Commons^™

Ryegrass Toxicity Organism Found On Other Grasses, D L. Chatel, J. L. Wise, A. G. Marfleet

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

Yellow slime disease caused by Corynebacterium sp. has recently been found in three grass species.

The diseased grasses were found in the field growing with each other and with affected toxic annual ryegrass.

Perennial Pasture Measures Up, D A. Nicholas

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

In a trial at Manjimup, a pasture based on the perennial grass, Currie cocksfoot, gave substantially more production than a comparable annual pasture.

Nocturnal Pollination Of Abronia Fragrans (Nyctaginaceae), Kathleen H. Keeler, Myra S. Fredricks

School of Biological Sciences: Faculty Publications

Abronia fragrans Nutt. (Nyctaginaceae) is a white-flowered herb of dry sandy soils from Idaho and South Dakota to Arizona and Texas. It can be readily observed to fit a night-blooming, moth-pollinated syndrome (Faegri and van der Pijl, The principle of pollination ecology, 1971). This does not seem to have been noted: in all references to A. fragrans we could find, the only indication of nocturnal anthesis was the comment of Nelson (Handbook of Rocky Mountain plants, 1969), who observed that the fragrance was more noticeable at night. Tillett (Brittonia 19:299-327, 1967), working on Pacific species, suggested that the …

The Allelopathic Potential Of Rhododendron Macrophyllum In A Western Cascades Clearcut, Ivan W. Clark

Dissertations and Theses

The purposes of this study were to determine if Rhododendron macrophyllum has the potential to inhibit the growth of other species through the production of water-soluble toxins which are leached out of its litter by rainfall, and to determine if this potential is realized in the field. The study was therefore composed of two part: 1) a series of bioassays to determine the presence an activity of water-soluble phytotoxins in R. macrophyllum leaf litter, and 2) a field study to describe vegetational patterns associated with R. macrophyllum in a western Cascades clearcut.

Translocation Of C14-Labeled Assimilates In Squash Petioles, William John Raupp

Masters Theses

A qualitative analysis of sieve tube sap was undertaken to help determine the method of assimilate movement in phloem. Hydroponically-grown squash plants (Cucurbita melopepo torticollis Bailey) were trimmed to a mature, fully-expanded leaf (the source) and one or more immature, unexpanded leaves (the sinks). The blade of the source leaf was exposed to C¹⁴O₂ in air for 10 minutes and allowed to translocate for 20 or 50 minutes in ambient air. Petioles of treated leaves were cut into sections and ground in cold buffer with a chilled mortar and pestle to extract materials from the translocation stream. …

Photoperiodicity In Adsuki Beans, A Preliminary Report, Thomas W. Clapp, Vivian L. Johnson

Journal of the Minnesota Academy of Science

One variety, Adsuki beans (Phaseolus angularis or Vigna angularis) has been demonstrated to be photoperiodically sensitive, flowering within fifty days or in the three to five internode stage when grown under "short day" conditions and remaining vegetative for at least 70 days or past the 12 internode stage under "long day" conditions.

Root Anatomy Of Fine Species Of Abronia From Southern California And Its Ecological Implications, Jan Webster

Theses Digitization Project

No abstract provided.

Grain Crop Variety Trials Western Australia 1978-1979, H. M. Fisher, G. B. Crosbie

Grain and other field crops research reports

The regional crop variety testing programme conducted by the Western Australian Department of Agriculture covers the final two stages of a four stage process of evaluating locally produced crossbreds and introduced material comprising:-

Plant Breeder Trials

Stage 1: Initial small plot yield tests on early generation material - 1 to 3 sites. Stage 2: Small plot yield tests on selected material (F5 derived) - 3 to 4 sites.

Regional Testing Programme

Stage 3: Large scale preliminary trials - 9 to 10 sites. Stage 4: Large scale final yield trials - 40 to 50 sites.

The basis of the regional programme …

Biosystematic Studies Of Impatiens Pallida And Impatiens Biflora (Balsaminaceae), Sandra M. Buening

Masters Theses

Impatiens pallida Nutt. and Impatiens biflora Walt. are two closely related species which grow together in mixed populations but do not hybridize. Flower buds of each species were enclosed with glycine bags to prevent insect pollination. These were left isolated until after anthesis to test for self-pollination and self-compatibility. Neither capsule formation nor seed set were observed.

Chromosomal smears showed that each species has a haploid number of ten chromosomes. Polyploidy was not observed.

Field observations of insect pollinators (primarily bees) showed indiscriminate visitation.

Flower buds were again bagged as before. During anthesis, individuals of the two species were cross-pollinated …

Forage Quality Evaluations Of Twelve Grasses In Relation To Season For Grazing, L. C. Newell, W. J. Moline

Nebraska Agricultural Experiment Station: Historical Research Bulletins

A study of forage quality in relation to seasonal yield of important perennial forage grasses was initiated to provide information and to promote a better understanding of their best use for grazing. This information should be particularly valuable in planning seasonal use of pure stands or mixtures of grasses.

Unialgal Growth Of Anabaena And Dictyosphaerium In Lake Itasca, Charles P. Mason

Journal of the Minnesota Academy of Science

A relatively new field technique was employed to determine the growth of algae in natural waters. Anabaena sp. (Cyanophyta) and Dictyosphaerium sp. (Chlorophyta) were grown in separate membrane filter chambers situated in Lake Itasca and LaSalle Lagoon, a sewage effluent pond. Physical and chemical determinations before and after each two-week experiment were correlated with changes in algal biomass. Wet weight determinations of Anabaena were twice as great in the lake as in the sewage lagoon, while Dictyosphaerium growth was the same in both habitats. Nitrogen (nitrate and nitrite) was 0.09 • 0.2 mg/1 in the lagoon and from less than …

The Elongation Of The Leaf Of Cyclamen Persicum Mill. (Cultivars), Marshall D. Sundberg

Journal of the Minnesota Academy of Science

The leaves of three cultivars of Cyclamen persicum were examined at several stages of development in order to determine the pattern of elongation in both the lamina and petiole. Although there is a considerable literature on lamina elongation, relatively little is known about the growth of the petiole. In the latter structure it is usually assumed that an intercalary meristem is involved. Elongation of the young leaf is initially due to activity distributed throughout the deve1opint organ. Maturation of the leaf progresses acropetally from the base of the petiole and basipetally from the tip of the lamina. As the leaf …

Effects Of Nutrients On Productivity And Morphology Of Typha Angustifolia X Latifolia, V. Bonnewell, D. C. Pratt

Journal of the Minnesota Academy of Science

The productivity of natural stands of cattails (Typha latifolia) has been correlated with the amounts of nutrients in the soil and water by Boyd and Hess (Ecology, 51: 296, 1970). The direct effects of varying levels of nitrogen (N), phosphorus (P) and potassium (K) on productivity were examined in our study by growing cattails in Hoagland's nutrient solution. Concentrations of ¼, 1/16, and 1/64 the amount of N present in complete Hoagland's solution (0.01Ml resulted in 63 percent, 48 percent and 26 percent of the dry weight of plants grown in complete solution. Rhizomes used to start plants contained considerable …

Trials Indicate Best Lupin Seeding Rates, G H. Walton

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

Trials on the seeding rate of lupins have shown that for most crops, at least 80kg of seed per hectare gives best yields. However the yields varied considerably, and in higher yielding situations, lower seeding rates were better.

Plants As Pumps, E A N Greenwood

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

Native species vary greatly in their ability to pump ground water.

CSIRO studies are measuring water use by different plants to plan revegetation strategies.

A Study Of Vascular Plants On Rock Outcrops In Southwestern West Virginia, Sheila Kay Adkins Zeto

Theses, Dissertations and Capstones

A total of 223 species of vascular plants representing 66 families were collected from rock outcrops at five study sites in Cabell, Wayne and Lincoln Counties, southwestern West Virginia. Eighteen species (8.07 percent) were present at all five sites with little regard for site conditions. One hundred seventeen species (52,4 percent) were restricted to only one of the five sites. The outcrop flora included nine species (5.03 percent) that are considered introduced elements, Forty-eight species were new additions to the flora of one or more of the counties studied, Floristic similarity coefficients of five sites range .from .347 to .512. …

A Comparative Scanning Electron Microscope Study Of Leaf Surface Morphology And Anatomy For Four Species Of Abronia Found Within California, Elliott Helm

Theses Digitization Project

No abstract provided.

The Cirsium Altissimum - Discolor Complex In Illinois, Dennis R. Bischoff

Masters Theses

Cirsium altissimum, C. discolor and suspected hybrids used in this study were collected during September 1977 from three locations in east central Illinois. All were combined for subsequent taking of data because the study dealt with incidence of hybridization and morphological discriminators rather than degrees and directions of introgression. Ten possible discriminators were chosen by examination of herbarium specimens of parental plants: I, Involucre width; II, Involucre height; III, Pubescence of upper leaf surface; IV, Angle of departure of main veins from the midrib; V, Number of spines per cm along the margin; VI, Length of indurate portion of …

Lupin Wild Types Introduced Into Western Australia To 1973, G B. Crosbie, John S. Gladstones

Technical Bulletins

Collection site data, preliminary rating of field characteristics and disease reactions, and measurements of seed protein oil contents.

Plant Distribution And Succession Within Interdunal Depressions On A Virginia Barrier Dune System, Robert Wayne Tyndall

Biological Sciences Theses & Dissertations

A unique series of interdunal depressions was recognized on the barrier dune system of southeastern Virginia. Plant distribution and succession, and environmental factors controlling them, were studied in the series. Plant community distribution appears to be predominantly controlled by soil moisture, interspecific competition, and feral hog disturbance. Both biotic and physiographic succession are apparent with Quercus virginiana probably climax for both. Salt spray and feral hog and migratory waterfowl activity are important controlling factors of plant succession. Results indicate that the zonal appearance of shrubs and trees on the Virginia and North Carolina coasts is due to the absence of …

Beach Vegetation And Oceanic Processes Study Of Popham State Park Beach, Reid State Park Beach, And Small Pt. Beach, Philip Trudeau, Paul J. Godfrey, Barry S. Timson

Maine Collection

Beach Vegetation and Oceanic Processes Study of Popham State Park Beach, Reid State Park Beach, and Small Pt. Beach

by Philip Trudeau, Paul J. Godfrey and Barry S. Timson

"Prepared Under Cooperative Agreement Between the Maine Department of Conservation and the Soil Conservation Service, United States Department of Agriculture, September 1977."

On Cover: Time and Tide Resource Conservation and Development Project.

Contents: List of Figures / List of Tables / Introduction / Plant Community Research / Oceanic Processes / Historic Analysis of Barrier Beach Movement and Erosion / Dune Dynamics / Suggestions for Long Term Management / Appendices A - …

Bulletin 3990 - The Narrow-Leafed Lupin In Western Australia, J. S. Gladstones

Bulletins - 3000 - 3999

Lupins are new as a commercial crop, but may be very old as a food plant. Types of the Mediterranean white lupin (Lupinus albus L.) have been part-developed and used as a subsistence crop for 3 000 years or more. Likewise the pearl lupin (L. mutabilis Sweet) has been grown for many centuries in the Andean Highlands of South America. In both cases the seeds are boiled and steeped in water for several days to rid them of their bitter, somewhat toxic alkaloids. They are then used directly as a valued protein source in human diets.

Bulletin No 4007 - Grasses In South Western Australia, J G. Paterson

Bulletins 4000 -

IThe grasses comprise one of the world's largest families of flowering plants, with over 500 groups or genera containing well over 5000 individual types or species distributed throughout the world. About 125 groups have been recorded in Western Australia but it is probable that the list is far from complete. About one third of these have ° been introduced from overseas.

The purpose of this bulletin is to describe those grasses which are more commonly found in the south-west of Western Australia. Also, as many people are interested in knowing the name and nature of a grass when they find …

Pollen Of The Myricaceae - A Preliminary Report, Marshall D. Sundberg

Journal of the Minnesota Academy of Science

Pollen of 16 species and one variety of the Myricaceae was examined, including members of each of the genera proposed by Chevalier (1901) in addition to Canacomyrica (Guillaumin, 1939). Comparison of pollen characters within genera, within sections, between sections, and between genera suggests that the Myricaceae can be divided into four genera: Canacomyrica; Comptonia; Gale; and Myrica. The genus Myrica can be further divided into three sections; Cerophora, Fava, and Morella.

Polythene Storage Improves Lupin Seed Germination, G H. Walton

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

Seed storage trials indicate a practical means of maintaining sandplain lupin seed at a moisture content that limits hard seed development, leading to a commercially acceptable germination rate in the following season.

Biosystematics Of The Abronia Villosa Complex From Southern California, Ned R. Curtis

Theses Digitization Project

No abstract provided.

Response Of Setaria Faberii To High Lime Soils, Nancy Huang, Russell S. Adams Jr.

Journal of the Minnesota Academy of Science

Setaria faberii (giant foxtail) was observed to grow poorly in some calcareous soils or upon the addition of calcium carbonate to some acid soils. The data suggest that liming might be a feasible and practical tool in the control of this major weed pest.

Comparative Anatomy And Systematics Of Picrodendron, Genus Incertae Sedis, W. John Hayden

Biology Faculty Publications

This study of the vegetative anatomy of Picrodendron and some of its putative relatives has been undertaken in order better to understand its natural relationships. Despite the number of anatomical studies in the literature (Jadin, 1901; Solereder, 1908; Boas, 1913; Webber, 1936; Heimsch, 1942; Record & Hess, 1943; Metcalfe & Chalk, 1950), our information on the anatomy of Picrodendron is still incomplete· for example, nodal and petiolar anatomy has apparently never been described. Furthermore, with the exception of Record and Hess (1943), who discussed Picrodendron in a family by itself, other anatomists have compared Picrodendron only with members of Simaroubaceae, …

Bulletin No 4023 - Pasture Plants Of The Western Australian Shrublands, D G. Wilcox, J G. Morrissey

Bulletins 4000 -

The use of the shrubland pastures of Western Australia began in 1861 when Mr. W. Burges of the Bowes Station near Northampton sent a flock of sheep along the Greenough River to graze the country where Yuin station is today. Following his example, a number of other enterprising men established grazing areas along the river courses of this harsh and often drought stricken and forbidding land. By 1925, virtually all of the pastoral land of value in the mulga zone west of the Gibson Desert and the Great Victoria Desert had been developed, and by 1934, over four million sheep …

Structural Comparisons Of Four Plant Communities In The Great Dismal Swamp, Claire Virginia Dabel

Biological Sciences Theses & Dissertations

Four plant communities in the Great Dismal Swamp, located on the coastal plain in southeastern Virginia, were sampled and estimates of density, basal area and aboveground standing crop biomass were determined, Biomass was estimated as 229,800 kg/ha in the Chamaecyparis thyoides community and as 344,500 kg/ha in the Taxodium distichum community. Biomass for the two hardwood communities, the

Acer-Nyssa community and mixed hardwood (Quercus-Nyssa-Acer-Liriodendron-Liquidamber) community was estimated as 195,700 kg/ha and 194,600 kg/ha respectively and did not differ significantly (P