Plant Sciences Commons^™

Development Of Vascular Connections Between Lateral Buds And Main Stem In Some Decapitated Plants, Syed Mushtaq Husain, Albert J. Linck

Journal of the Minnesota Academy of Science

After decapitation of pea plants, with resultant growth of lateral buds, the thickness of vascular tissue appeared to be correlated with the growth rate of buds. Basal lateral shoots had better developed vascular strands than buds on upper parts of the plants. IAA application retarded growth of the lateral buds and inhibited their vascular connections, but all lateral buds eventually grew in spite of the IAA application.

A Disc Electrophoretic Procedure For Separating Proteins Of Marchantia Polymorpha: Esterases., Jerome Anaya, Donald J. Kraft

Journal of the Minnesota Academy of Science

Extracts from Marchanlia polymorpha were used in the development of a disc electrophoretic procedure for the separation of proteins. Dialyzed and fresh extracts were found to produce best resolution when electrophoresed in Tris-Glycine buffer (pH 8.3) and 50 millamps current for 45-60 minutes. The esterase enzyme system was used as an indication of separation. Significantly, 5 bands were detected in induced thalli attesting to the sensitivity and application of this method to developmental studies.

Detecting Oak Wilt By False Color Infrared Aerial Photography, R. P. Latham, D. W. French, Merle P. Meyer

Journal of the Minnesota Academy of Science

An aerial survey using false-color infrared film at scales of l :9,600 and l : 12,000 located 93.7% of the oak wilt infection centers ii:1 the 1,500-acre study area. The ground survey of the same area also located 93.7% of the infection centers but half of those found by this method were difficult to relocate because they were not correctly mapped. Whereas aerial survey usually missed only trees of small diameter, the ground survey missed trees as large as eight inches in diameter.

Regeneration Of White Cedar In Northern Swamps, Walter H. Petraborg

Journal of the Minnesota Academy of Science

Regeneration of white cedar in six northern Minnesota swamps by layering, suckering, and seeding was found where surface and subsurface soils were circum-neutral (median pH 7.1 for surface soils and 7.0 for subsurface soils) but not on more acid soils. Regeneration was best where the peat soil was coarsely decomposed and little compacted, and where the water table was high with some flow of ground water through the swamp. Sphagnum moss grew on all regeneration sites but was also found on more acid, unsuitable sites. No single associated groundcover plant appeared to be a specifically reliable indicator species for regeneration …

Estimating Surface Area Of Soybean Root Systems, John B. Carlson

Journal of the Minnesota Academy of Science

A procedure for estimating the total root length, root surface, and root hair surface is described for greenhouse-grown soybeans. Data are presented on the extent of the root systems of 3-week and 14-week old soybeans. The possibility of correlating data from greenhouse-grown soybeans with that of field-grown soybeans as a method to make some predictions on extent of the root systems of field-grown soybeans is suggested.

Ferns And Fern Allies Of Brown County, Barbara J. R. Gudmunson

Journal of the Minnesota Academy of Science

In collecting ferns and fern allies in Brown County, Minnesota, during the 1964 summer, six of the seven species previously recorded were found again and six fern species and seven horsetail species and varieties new to the records were collected.

Tao newly found in 1964 are: Botrychium virginianum var. virginianum, Osmunda clayfoniana, Woodsia obtusa, Woodsia oregana var. cathcartiana, Athyrium filix-femina var. michauxii, Cystopteris bulbifera, Equisetum hyemale var. pseudohyemale, Equisetum hyemale var. elatum, Equisetum scirpoides, Equisetum fluviatile, Equisetum palustre, Equisetum pratense, and Equisetum sylvaticum.

Voucher specimens of the nineteen taxa were deposited in the herbarium of Mankato Stole College. Duplicate specimens …

Germinability Factors Of Field-Grown Sorghum Seed, D. B. Sauer, C. M. Christensen

Journal of the Minnesota Academy of Science

Germination of sorghum seed did not appear to be affected by spraying the plants with Maneb or with a chemical defoliant before harvest. Mechanical threshing greatly reduced germination of most but not all lots; this injury is thought to be related to the maturity and/ or moisture content of the seed when threshed, although other varietal differences may be important. At any given time there were large differences in moisture content between seeds of different hybrids, different plants of any one hybrid, and between different parts of the same panicle.

Lead Absorption From Soil Into Legumes, Marie H. Berg

Journal of the Minnesota Academy of Science

There is evidence that lead is taken up from the soil into legumes and accumulated in the leaves of beans and peanuts which were examined in this study.