The role of siderophores in potato tuber yield increase by Pseudomonas putida in a short rotation of potato

1986 ◽  
Vol 92 (6) ◽  
pp. 249-256 ◽  
Author(s):  
P. A. H. M. Bakker ◽  
J. G. Lamers ◽  
A. W. Bakker ◽  
J. D. Marugg ◽  
P. J. Weisbeek ◽  
...  
Keyword(s):  
Potato Tuber ◽  
Pseudomonas Putida ◽  
Tuber Yield ◽  
Yield Increase ◽  
Short Rotation

Timing Potato Cultivation Using The Weedcast Model

Weed Science ◽  
2009 ◽  
Vol 57 (1) ◽  
pp. 87-93 ◽  
Author(s):  
Joel Felix ◽  
Jerry Ivany ◽  
George O. Kegode ◽  
Doug Doohan
Keyword(s):  
Potato Tuber ◽  
Weed Control ◽  
Decision Aid ◽  
Tuber Yield ◽  
Yield Increase ◽  
Common Lambsquarters ◽  
Eastern Black Nightshade ◽  
Black Nightshade ◽  
Weed Emergence ◽  
Plot Design

A weed emergence prediction model, WeedCast, was used as a decision aid to schedule potato cultivation with and without herbicides at Wooster, OH, USA; Charlottetown, PE, Canada; and Fargo, ND, USA, from 2001 to 2003. Studies were laid out in a split-plot design with herbicides (±) forming the main plots and cultivation timing as subplots. Cultivation was done at 15, 30, or 60% of predicted weed emergence. Subplots were either left unsprayed or treated with metolachlor + metribuzin at 1.68 + 0.5 kg ai ha−1and only cultivated at predetermined timing. Cultivation timing was based on predicted emergence of common lambsquarters at Wooster and Charlottetown, whereas eastern black nightshade was the indicator weed at Fargo. Weed control for the different cultivation timings varied among sites and years and was consistently better in plots where herbicides were followed by cultivation. Cultivation alone resulted in poor weed control and significantly reduced potato tuber yield compared with those in plots where weed control also included herbicides. Use of herbicides followed by cultivation and hilling increased tuber yield by 4.6, 4.3, and 8.7 t ha−1, when cultivations were done at 15, 30, and 60% of predicted weed emergence, respectively, and 12.2 t ha−1for hilled-only plots. The average potato yield increase at Charlottetown was 9.7, 5.9, 6.9, and 7.4 t ha−1for hilled-only plots and for hilled after cultivations at 15, 30, and 60% of predicted weed emergence with herbicides, respectively. There was no apparent pattern for treatment effects at Fargo, and the potato tuber yields were greatly reduced mainly because of excessive precipitation during potato establishment. Use of WeedCast as a decision-aid tool could be an asset in determining when to do the first and subsequent cultivations. It may work best for growers who use cultivations in potato to remove weeds that were not controlled by herbicides.

SEM Study of Tension Wood Fiber Morphology and its Effect on Paper Properties

1977 ◽  
Vol 35 ◽  
pp. 308-309
Author(s):  
K. W. Robinson
Keyword(s):  
Tension Wood ◽  
Wood Fiber ◽  
Strength Properties ◽  
Fiber Morphology ◽  
Paper Properties ◽  
Pure Cellulose ◽  
Short Rotation ◽  
Hardwood Trees ◽  
Sem Study

Tension wood (TW) is an abnormal tissue of hardwood trees; although it has been isolated from most parts of the tree, it is frequently found on the upper side of branches and leaning stems. TW has been classically associated with geotropic alignment, but more recently it has been associated with fast growth. Paper made from TW is generally lower in strength properties. Consequently, the paper industries' growing dependence on fast growing, short- rotation trees will result in higher amounts of TW in the final product and a corresponding reduction in strength.Relatively few studies have dealt with the role of TW in the structure of paper. It was suggested that the lower strength properties of TW were due to a combination of factors, namely, its unique morphology, compression failures in the cell wall, and lower hemicellulose content. Central to the unique morphology of the TW fiber is the thick gelatinous layer (G-layer) composed almost entirely of pure cellulose.

The effects of the growth-regulating compounds methyl decanoate and 2, 3, 5-triiodobenzoic acid on potato tuber size

1976 ◽  
Vol 86 (2) ◽  
pp. 251-255
Author(s):  
D. C. E. Wurr
Keyword(s):  
Potato Tuber ◽  
Size Distribution ◽  
Tuber Yield ◽  
Potato Crop ◽  
Total Yield ◽  
Tuber Size ◽  
Tuber Initiation ◽  
Triiodobenzoic Acid ◽  
Tuber Size Distribution ◽  
Methyl Decanoate

SummaryApplication of methyl decanoate to a potato crop about the time of tuber initiation reduced the total yield and the yield of tubers in the grade 2·5–5·5 cm though neither of these reductions were significant. However, application of 2,3,5-triiodobenzoic acid increased the yield of tubers 2·5–5·5 cm by up to 20% while having no significant effect on total tuber yield. This change in the tuber size distribution was due to a more even partition of photosynthate between tubers and not to an increase in the total number of tubers.

POTATO TUBER YIELD AND QUALITY AS AFFECTED BY RATES AND SOURCES OF POTASSIUM FERTILIZER

2012 ◽  
Vol 35 (5) ◽  
pp. 664-677 ◽  
Author(s):  
M. Zameer Khan ◽  
M. Ehsan Akhtar ◽  
M. Mahmood-ul-Hassan ◽  
M. Masud Mahmood ◽  
M. Naeem Safdar
Keyword(s):  
Potato Tuber ◽  
Tuber Yield ◽  
Potassium Fertilizer ◽  
Yield And Quality

IN VIVO ROLE OF SULFITE IN PHOTOCONTROL OF UROCANASE FROM Pseudomonas putida

1985 ◽  
Vol 41 (1) ◽  
pp. 77-81 ◽  
Author(s):  
Richard C. Venema ◽  
John K. Hunter ◽  
Daniel H. Hug
Keyword(s):  
Pseudomonas Putida

Induction of Rishitin and Lubimin Synthesis in Potato Tuber Slices by Non-Specific Elicitors — Role of Gene Derepression

1979 ◽  
Vol 42 (6) ◽  
pp. 512-518 ◽  
Author(s):  
A. S. CHEEMA ◽  
N. F. HAARD
Keyword(s):  
Potato Tuber ◽  
Mrna Translation ◽  
Metabolic Inhibitors ◽  
Protein Synthesis Inhibitors ◽  
High Concentration ◽  
Low Concentrations ◽  
Translation Block ◽  
Heavy Metal Salts ◽  
Stress Metabolites

The stress metabolites rishitin and lubimin accumulate at relatively low concentrations (5–20 ppm) in potato tuber slices subjected to various cell-disruptive treatments including heavy metal salts, sulfhydryl reagents, metabolic inhibitors, detergents, ultraviolet light and lysosomal enzymes. Cold-stored (4 C) tubers are more disposed to terpene accumulation than freshly harvested, 25-C stored and conditioned potatoes. Various inhibitors of DNA transcription and mRNA translation block terpene induction by non-specific elicitors when applied at sufficiently high concentration. However. various protein synthesis inhibitors were shown to be potent elicitors of terpene accumulation when applied at lower concentration. Actinomycin D (25 μg/ml) treatment of discs for 30 min elicits higher levels of rishitin than results from Phytophthora infestans interaction with potato (> 100 ppm). A mechanism for terpene induction based on derepression of “stress metabolite DNA” is proposed to explain the experimental data.

Forecasting potato tuber yield using a soil electromagnetic induction method

2019 ◽  
Author(s):  
Aitazaz A. Farooque ◽  
Mahnaz Zare ◽  
Farhat Abbas ◽  
Melanie Bos ◽  
Travis Esau ◽  
...  
Keyword(s):  
Potato Tuber ◽  
Electromagnetic Induction ◽  
Tuber Yield ◽  
Induction Method
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