Some factors affecting stolon and tuber formation in the potato plant

1962 ◽  
Vol 5 (1) ◽  
pp. 28-39 ◽  
Author(s):  
Birger Svensson
Keyword(s):  
Potato Plant ◽  
Tuber Formation ◽  
Factors Affecting

scholarly journals Observations on the formation and growth of tubers on the potato plant.

1955 ◽  
Vol 3 (4) ◽  
pp. 291-304
Author(s):  
N. Krijthe
Keyword(s):  
Seed Potato ◽  
Potato Plant ◽  
General Scheme ◽  
Storage Condition ◽  
Tuber Formation ◽  
Tuber Growth ◽  
Seed Potatoes ◽  
The Relationship

An account is given of an investigation, to be continued for several years, on the relationship between chitting, number of sprouts on the seed potato and the grading of the harvested potatoes. The influence of the following treatments on tuber growth (one treatment per year) was studied: (1) methods of chitting; (2) size of seed potatoes and (3) storage condition. After the first fortnight's growth, whole, sample plants were lifted weekly to study the position of stolons on the stems, and the location of the largest and smallest tubers on the plant, the size of tuber being judged by its length. At each lifting, the relative positions of the largest, the smallest and of the medium-sized tubers were the same on each plant. These positions were approximately the same in different varieties of potatoes, and the general scheme is shown diagramatically. The treatments (1), (2) and (3) showed no significant effects on formation and growth of tubers provided the sprouts of the seed potatoes were the same length. The phenomenon of secondary-tuber formation is discussed.-D.B. (Abstract retrieved from CAB Abstracts by CABI’s permission)

scholarly journals Resistance to virus diseases of some F1 clones descended from the species hybridization Solanum demissum x S. tuberosum

1960 ◽  
Vol 32 (1) ◽  
pp. 73-80
Author(s):  
Onni Pohjakallio ◽  
Laura Karhuvaara
Keyword(s):  
Potato Plant ◽  
Tuber Formation ◽  
Solanum Demissum ◽  
Virus Diseases ◽  
Rate Of Development ◽  
Species Hybridization

The following are the main conclusions to be drawn from the results of experiments in which the resistance of F1 clones descended from the species hybridization Solanum demissum x S. tuberosum (Rosafolia) was investigated: The clones forming purple tubers appeared to be very susceptible to the potato rugose. Bud mutants descended from the former, forming white tubers, appeared to be wholly resistant to this virus. The virus accelerated the onset of tuber formation and the decline of the haulms of the susceptible F1 plants. The degeneration of the virus-diseased plants did not progress from one vegetative generation to the next; instead, the virus altered the rate of development of the potato plant to a new level.

Regulation of Tuber Formation in the Potato Plant

1962 ◽  
Vol 15 (3) ◽  
pp. 413-419 ◽  
Author(s):  
Yozo Okazawa ◽  
Harold W. Chapman
Keyword(s):  
Potato Plant ◽  
Tuber Formation

Progress In The Practical Application Of Automated Image Analysis To Tem Negatives

1977 ◽  
Vol 35 ◽  
pp. 214-217
Author(s):  
F. A. Heckman ◽  
E. Redman ◽  
J.E. Connolly
Keyword(s):  
Image Analysis ◽  
Image Quality ◽  
Exposure Time ◽  
Image Contrast ◽  
Automated Image Analysis ◽  
Practical Application ◽  
Factors Affecting ◽  
High Image Quality ◽  
Qualitative Evidence ◽  
Comprehensive Study

In our initial publication on this subject1) we reported results demonstrating that contrast is the most important factor in producing the high image quality required for reliable image analysis. We also listed the factors which enhance contrast in order of the experimentally determined magnitude of their effect. The two most powerful factors affecting image contrast attainable with sheet film are beam intensity and KV. At that time we had only qualitative evidence for the ranking of enhancing factors. Later we carried out the densitometric measurements which led to the results outlined below.Meaningful evaluations of the cause-effect relationships among the considerable number of variables in preparing EM negatives depend on doing things in a systematic way, varying only one parameter at a time. Unless otherwise noted, we adhered to the following procedure evolved during our comprehensive study:Philips EM-300; 30μ objective aperature; magnification 7000- 12000X, exposure time 1 second, anti-contamination device operating.

Factors affecting microstructural scale in liquid crystalline polymers

1990 ◽  
Vol 48 (4) ◽  
pp. 220-221
Author(s):  
Christine M. Dannels ◽  
Christopher Viney
Keyword(s):  
Liquid Crystalline ◽  
Liquid Crystalline Polymers ◽  
Factors Affecting ◽  
Crystalline Polymers ◽  
Thermal Expansion Coefficients ◽  
Low Thermal Expansion ◽  
Lower Viscosity ◽  
Fine Microstructure ◽  
Planar Orientation ◽  
Strength And Stiffness

Processing polymers from the liquid crystalline state offers several advantages compared to processing from conventional fluids. These include: better axial strength and stiffness in fibers, better planar orientation in films, lower viscosity during processing, low solidification shrinkage of injection moldings (thermotropic processing), and low thermal expansion coefficients. However, the compressive strength of the solid is disappointing. Previous efforts to improve this property have focussed on synthesizing stiffer molecules. The effect of microstructural scale has been overlooked, even though its relevance to the mechanical and physical properties of more traditional materials is well established. By analogy with the behavior of metals and ceramics, one would expect a fine microstructure (i..e. a high density of orientational defects) to be desirable.Also, because much microstructural detail in liquid crystalline polymers occurs on a scale close to the wavelength of light, light is scattered on passing through these materials.

Factors affecting dentist participation in a state Medicaid program

1990 ◽  
Vol 54 (11) ◽  
pp. 638-643 ◽  
Author(s):  
PC Damiano ◽  
ER Brown ◽  
JD Johnson ◽  
JP Scheetz
Keyword(s):  
Medicaid Program ◽  
Factors Affecting
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