Relation of water supply to xylem discoloration of potato tubers caused by vine killing

1952 ◽  
Vol 29 (5) ◽  
pp. 113-122 ◽  
Author(s):  
Wm. G. Hoyman
Keyword(s):  
Water Supply ◽  
Potato Tubers ◽  
Vine Killing ◽  
Xylem Discoloration

scholarly journals Influence of Drought and Wounding Stress on Soluble Phenols and Proteins in Potato Tubers

2014 ◽  
Vol 3 (3) ◽  
pp. 1 ◽  
Author(s):  
Christina B. Wegener ◽  
Gisela Jansen ◽  
Hans-Ulrich Jurgens
Keyword(s):  
Amino Acids ◽  
Drought Stress ◽  
Water Supply ◽  
Free Amino Acids ◽  
Free Amino ◽  
Potato Tubers ◽  
Fresh Tissue ◽  
Plant Phenols ◽  
Wounding Stress ◽  
Soluble Phenols

<p>Potato is a valuable source for phytochemicals like vitamins, minerals, plant phenols, amino acids and proteins. However, environmental stress may affect the level of all these components. In this study, two purple breeding clones and one yellow fleshed cultivar (cv.) were assessed in their response to drought and wounding stress in two consecutive years. The plants were grown in the greenhouse under control (sufficient water supply) and with drought stress conditions. After harvest the tubers were analyzed for the content of soluble phenols and proteins in fresh tissue and after wounding. In addition, free amino acids (AAS) and activity of lipid acyl hydrolases (LAH) were assayed in control and drought stressed tubers. The results revealed significant differences in soluble phenols and proteins between genotypes, and that drought stress significantly increased the level of soluble proteins (P &lt; 0.0001) and LAH activity (P &lt; 0.001), but had no significant effect on the concentration of phenols. Moreover, total amounts of free AAS were higher in the drought stress variant. Wounding stress caused a significant increase of soluble phenols in cv. Agave. But, this was less prominent in purple clones which in general had higher contents of phenols. Proteins were also enhanced as a result of wounding, although, the effect of wounding stress on their level was smaller than that of drought stress.<strong></strong></p>

Control of sprout growth in the potato. Effect of humidity and water supply

1984 ◽  
Vol 62 (10) ◽  
pp. 2140-2145 ◽  
Author(s):  
Gordon I. McIntyre ◽  
William A. Quick
Keyword(s):  
Water Supply ◽  
Water Content ◽  
Significant Interaction ◽  
Growth Response ◽  
Dry Weight ◽  
Weight Basis ◽  
Potato Tubers ◽  
Factors Affecting ◽  
External Water ◽  
Sprout Growth

The growth of apical sprouts of potato tubers, var. Norland, kept in darkness at 15 °C, was significantly increased either by increasing the relative humidity (RH) from approximately 40 to 100% or by supplying water to the basal cut end of the tubers. These two treatments showed a significant interaction, the response to the external water supply being considerably greater at the higher RH. The growth response was closely correlated with increases in the dry weight and the water content of the sprouts, expressed on either a sprout or dry weight basis. The high RH plus water treatment also eliminated the inhibition of sprout growth by light, the length of the sprouts in this treatment being almost 160% greater than in the light at low RH and 60% greater than in the dark. These results are consistent with the hypothesis that when the tuber has no external supply of water, the growth of the sprouts is determined primarily by their water content, and thus by the effect and interaction of factors affecting the supply of water from the tuber and its rate of loss from the sprouts by transpiration.

Enumeration and Identification of Asbestos Fibres in Water

1974 ◽  
Vol 32 ◽  
pp. 526-527 ◽  
Author(s):  
O. Mudroch ◽  
J. R. Kramer
Keyword(s):  
Water Supply ◽  
Water Samples ◽  
Drainage Basin ◽  
Lake Superior ◽  
Research Work ◽  
List Type ◽  
The West ◽  
Asbestos Fibre ◽  
Amphibole Asbestos

Approximately 60,000 tons per day of waste from taconite mining, tailing, are added to the west arm of Lake Superior at Silver Bay. Tailings contain nearly the same amount of quartz and amphibole asbestos, cummingtonite and actinolite in fibrous form. Cummingtonite fibres from 0.01μm in length have been found in the water supply for Minnesota municipalities.The purpose of the research work was to develop a method for asbestos fibre counts and identification in water and apply it for the enumeration of fibres in water samples collected(a) at various stations in Lake Superior at two depth: lm and at the bottom.(b) from various rivers in Lake Superior Drainage Basin.

Bacterial biofilm behavior in water-supply lines of dental units

1992 ◽  
Vol 50 (1) ◽  
pp. 882-883
Author(s):  
B.D. Tall ◽  
K.S. George ◽  
R. T. Gray ◽  
H.N. Williams
Keyword(s):  
Water Supply ◽  
Medical Devices ◽  
Biofilm Formation ◽  
Bacterial Biofilm

Studies of bacterial behavior in many environments have shown that most organisms attach to surfaces, forming communities of microcolonies called biofilms. In contaminated medical devices, biofilms may serve both as reservoirs and as inocula for the initiation of infections. Recently, there has been much concern about the potential of dental units to transmit infections. Because the mechanisms of biofilm formation are ill-defined, we investigated the behavior and formation of a biofilm associated with tubing leading to the water syringe of a dental unit over a period of 1 month.

Postharvest changes in endogenous ABA levels and ABA metabolism in relation to dormancy in potato tubers

1995 ◽  
Vol 95 (2) ◽  
pp. 233-240 ◽  
Author(s):  
Jeffrey C. Suttle
Keyword(s):  
Potato Tubers ◽  
Aba Metabolism ◽  
Endogenous Aba

The Water Supply of Lake Nicaragua

1901 ◽  
Vol 51 (1306supp) ◽  
pp. 20932-20932
Author(s):  
Angelo Heilprin
Keyword(s):  
Water Supply

A Water Supply for Jerusalem

1903 ◽  
Vol 55 (1422supp) ◽  
pp. 22784-22784
Keyword(s):  
Water Supply

Future Water Supply of Greater New York

1896 ◽  
Vol 41 (1061supp) ◽  
pp. 16959-16960
Keyword(s):  
New York ◽  
Water Supply

Future Data Collection Needs on Water Supply Reservoirs

WRPMD'99 ◽  
1999 ◽  
Author(s):  
Saša Tomi
Keyword(s):  
Data Collection ◽  
Water Supply ◽  
Future Data ◽  
Water Supply Reservoirs
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