Metabolite accumulation during ice encasement of timothy grass (Phleum pratense L.)

1994 ◽  
Vol 102 ◽  
pp. 373-380 ◽  
Author(s):  
Bjarni E. Gudleifsson
Keyword(s):  
Pseudomonas Fluorescens ◽  
Phleum Pratense ◽  
Anoxic Conditions ◽  
Timothy Grass ◽  
Subzero Temperatures ◽  
Long Duration ◽  
Ice Encasement ◽  
Metabolite Accumulation ◽  
Phleum Pratense L ◽  
Thaw Water

SynopsisPlants are killed by prolonged ice encasement at slightly subzero temperatures and under these anoxic conditions a number of metabolites are accumulated. Timothy grass plants encased in ice at −2°C can survive these conditions for many weeks and accumulate mainly CO2 and ethanol and lower levels of malate, oxalate, citrate, fumarate and pyruvate. While the accumulation of most of the metabolites increases towards the end of the encasement period the amount of malate decreases, indicating utilisation. Late in the encasement period lactate, butyrate, and traces of malonate, formate and tartarate were detected which might be of bacterial origin. The bacteria most commonly isolated from ice-encased plants is Pseudomonas fluorescens (Trevisan) which in most cases is saprophytic. All of the above-mentioned metabolites were also detected from thaw water in the field after long duration of ice encasement, butyrate attaining the highest concentration.

5S rDNA of timothy- grass Phleum pratense L.

2018 ◽  
Vol 10 (2) ◽  
pp. 107-112
Author(s):  
O Ishchenko ◽  
◽  
T Derevenko ◽  
I Panchuk ◽  
◽  
...  
Keyword(s):  
5S Rdna ◽  
Phleum Pratense ◽  
Timothy Grass ◽  
Phleum Pratense L

CHEMICAL COMPOSITION OF WILD SAMPLES OFTIMOTHY-GRASS (PHLEUM PRATENSE L.)

2020 ◽  
Author(s):  
Valentina Korovina ◽  
Nikolay Kozlov ◽  
Tamara Komkova
Keyword(s):  
Chemical Composition ◽  
Statistical Processing ◽  
Phleum Pratense ◽  
Research Center ◽  
Timothy Grass ◽  
Low Level ◽  
Experimental Base ◽  
Standard Collection ◽  
Phosphorus And Potassium ◽  
Phleum Pratense L

The research was carried out in the field at the Central experimental base of the Federal Williams Research Center. The object of research was 13 samples of timothy-grass. Samples were sown according to the scheme of a standard collection nursery. All studies and observations were carried out on the herbage of the 2nd and 3rd year of life. Statistical processing of the research results indicates a low level of variation. The sample № 414 stood out high content of raw protein and raw fat. Two significant correlations were found (between the content of phosphorus and potassium, as well as between crude fiber and crude ash). Analysis of remoteness and kinship between samples showed the presence of 5 clusters (genetically different quality groups), which can be used for breeding for combinational ability and fixing of breeding-valuable features and properties.

A COMPARISON OF COLD HARDINESS AND ICE ENCASEMENT TOLERANCE OF TIMOTHY GRASS AND WINTER WHEAT

1983 ◽  
Vol 63 (2) ◽  
pp. 429-435 ◽  
Author(s):  
C. J. ANDREWS ◽  
B. E. GUDLEIFSSON
Keyword(s):  
Low Temperature ◽  
Winter Wheat ◽  
Cold Hardiness ◽  
Triticum Aestivum L ◽  
Similar Rate ◽  
Phleum Pratense ◽  
Temperature Growth ◽  
Low Temperature Growth ◽  
Timothy Grass ◽  
Ice Encasement

In the falls of 1979 and 1980 Salvo timothy grass (Phleum pratense L.) showed cold hardiness similar to Norstar winter wheat (Triticum aestivum L.) but significantly greater hardiness than Fredrick winter wheat. Ice tolerance of Salvo, with LI50 values of 29 and 45 days in the 2 yr, was more than twice that of the wheats. In controlled environments, seedlings of three timothy cultivars showed relatively low cold hardiness, but about threefold greater ice tolerance than the wheats. An Icelandic timothy cultivar, Korpa, showed greater ice tolerance than the Norwegian Engmo, and the Canadian cultivar Salvo. Fredrick wheat, and Korpa timothy cold hardened at a similar rate for 4 wk, but Korpa continued to harden to − 18 °C up to 6 wk of low temperature growth. Korpa rapidly attained a high tolerance to ice encasement in 2 wk of low temperature growth while Fredrick attained relatively low ice tolerance reaching a maximum at 3 wk of growth. There is little association between cold and ice tolerance in timothy, and there is a major difference in the ice tolerances of timothy and winter wheat. This high ice tolerance is likely to be a major cause of the superior survival of timothy in conditions of high winter stress. Key. words: Triticum, Phleum, acclimation, resistance, low temperature, frost

scholarly journals Effect of seed aging on the seed quality and seedling growth of timothy grass (Phleum pratense L.)

2019 ◽  
Vol 23 (2) ◽  
pp. 10-13
Author(s):  
Rade Stanisavljević ◽  
Dobrivoj Poštić ◽  
Jasmina Milenković ◽  
Dragoslav Đokić ◽  
Dragoljub Beković ◽  
...  
Keyword(s):  
Seedling Growth ◽  
Seed Quality ◽  
Phleum Pratense ◽  
Timothy Grass ◽  
Seed Aging ◽  
Phleum Pratense L

Structural and immunological properties of arabinogalactan polysaccharides from pollen of timothy grass (Phleum pratense L.)

2005 ◽  
Vol 340 (4) ◽  
pp. 657-663 ◽  
Author(s):  
Lothar Brecker ◽  
Daniel Wicklein ◽  
Hermann Moll ◽  
Elmar C. Fuchs ◽  
Wolf-Meinhard Becker ◽  
...  
Keyword(s):  
Phleum Pratense ◽  
Immunological Properties ◽  
Timothy Grass ◽  
Phleum Pratense L
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