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Full-Text Articles in Life Sciences
Occurrence And Severity Of The Viruses Of Strawberry In Minnesota, T. H. King, Stephen C.Y. Liu, R. L. Skiles
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
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
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 …
Relative Susceptibility To Fungus Infection Of Liberty Barley Kernels With Albino And Normal Lemmas, Richard W. Lutey
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 …