scholarly journals Ester- and ether-linked phenolic acids in orchardgrass (Dactylis glomerata L.) and their digestion from cell walls when fed to sheep

1991 ◽  
Vol 71 (4) ◽  
pp. 1179-1182 ◽  
Author(s):  
Tsuneo Kondo ◽  
Tomoko Ohshita ◽  
Tadashi Kyuma
Keyword(s):  
Cell Walls ◽  
Enzymatic Degradation ◽  
Dactylis Glomerata ◽  
Coumaric Acid ◽  
Wall Materials ◽  
Dactylis Glomerata L ◽  
Ferulic Acids ◽  
Acid Esters ◽  
Heading Stage ◽  
Cell Wall Materials

Ester- and ether-linked p-coumaric (PCA) and ferulic acids (FA) in cell wall materials from orchardgrass (Dactylis glomerata L.), hays harvested at the heading stage and feces samples from sheep fed the orchardgrass hays were analyzed. Results showed that ether-linked PCA and FA were more resistant to ruminant digestion and enzymatic degradation than ester-linked PCA and FA. Key words: p-coumaric acid, esters, ethers, ferulic acid, orchardgrass, sheep digestion

scholarly journals Study on Improving the Fixation Rate of Impregnated Poplar Wood with Maltodextrin and 1,3-Dimethylol-4,5-Dihydroxyethyleneurea

2019 ◽  
Vol 9 (16) ◽  
pp. 3237
Author(s):  
Mingzhen Cai ◽  
Zongying Fu ◽  
Yingchun Cai ◽  
Yue Zhang
Keyword(s):  
Compressive Strength ◽  
Cell Wall ◽  
Fourier Transform ◽  
Cell Walls ◽  
Poplar Wood ◽  
Fixation Rate ◽  
Practical Applications ◽  
Wall Materials ◽  
Impregnated Wood ◽  
Cell Wall Materials

The impregnation of poplar wood (Populus adenopoda Maxim) with 1,3-dimethylol-4,5-dihydroxyethyleneurea and maltodextrin and the effects of ZnCl2 and curing at 103 °C and 120 °C on the fixation rate and the leaching resistance of modified samples were investigated (103 °C curing, ZnCl2 + 103 °C curing, 120 °C curing, and ZnCl2 + 120 °C curing are denoted as 103, ZC-103, 120, and ZC-120, respectively), with the aim of improving the modification effect. The results showed that ZC-103 had the highest fixation rate, and its weight leaching ratio was higher than that of 120. Fourier-transform infrared spectroscopy showed that ZnCl2 did not affect the functional groups of the modified chemicals. The flexural strength and modulus and the compressive strength perpendicular to the grain were highest for ZC-103. In summary, ZC-103 exhibited the highest fixation rate, indicating that the hardener ZnCl2 bridged and increased the interfacial properties between the chemicals and cell walls and therefore increased the potential for macromolecule polycondensation between the chemicals and cell wall materials. This research paves the way for improving the fixation rate of impregnated wood and provides new insights into practical applications.

Une régie de trois coupes chez le dactyle (Dactylis glomerata L.) en régions agricoles du Moyen-Nord de l'Est du Canada

1999 ◽  
Vol 79 (2) ◽  
pp. 231-238
Author(s):  
R. Drapeau
Keyword(s):  
Dry Matter ◽  
Dactylis Glomerata ◽  
Climatic Conditions ◽  
Dry Matter Yield ◽  
Eastern Canada ◽  
The Third ◽  
Negative Effect ◽  
Cutting Management ◽  
Dactylis Glomerata L ◽  
Heading Stage

Orchardgrass (Dactylis glomerata L.) has good winter survival in the mid-north agricultural areas of eastern Canada. There is no information on the cutting management to use after the first harvest of orchardgrass under these climatic conditions. The objective of this study was to determine the required interval between harvests following a first harvest at heading stage to optimise the productivity and maintain the persistence of orchardgrass. An interval of 35 d between harvests was sufficient to obtain annual yields of 4 to 6 tonnes of dry matter per hectare. An interval of 28 d between harvests had no negative effects on orchardgrass persistence under our climatic conditions. A second harvest taken 42 d after the first one often had a negative effect on the dry matter yield of the third harvest. Each time this occurred, we observed that the second harvest had been taken after 20 July. Heading dates varied among years. In addition to the growth stage at the first harvest, the date of occurrence of the heading stage should be considered so that the second harvest will be taken before 20 July. Consequently, if heading is delayed in spring, the interval between the first and second harvest must be reduced to take the second harvest before 20 July. Delaying the third harvest had a negative effect on the dry matter yield of the first harvest of the following production year. These results indicate that it is possible to take three harvests before September under the climatic conditions of the mid-north of eastern Canada without affecting the persistence of orchardgrass. Key words: Dactylis glomerata L., orchardgrass, cutting stage, cutting intervals, cutting management, yield

scholarly journals Retention of Water by Plant Cell Walls and Implications for Drought Resistance

1967 ◽  
Vol 20 (1) ◽  
pp. 41 ◽  
Author(s):  
TS Teoh ◽  
LAG Aylmore ◽  
JP Quirk
Keyword(s):  
Cell Wall ◽  
Vicia Faba ◽  
Plant Cell ◽  
Drought Resistance ◽  
Cell Walls ◽  
Plant Cell Walls ◽  
Triticum Vulgare ◽  
Vicia Faba L ◽  
Wall Materials ◽  
Cell Wall Materials

The water�retaining properties of cell wall materials from the roots of two monocotyledons (Ehrharta calycina Sm. and Triticum vulgare Vill. cv. Gabo) and two dicotyledons (Salicornia australis Banks & Soland and Vicia faba L.) have been studied.

CELL WALL-BOUND p-COUMARIC AND FERULIC ACIDS IN ITALIAN RYEGRASS

1990 ◽  
Vol 70 (2) ◽  
pp. 495-499 ◽  
Author(s):  
TSUNEO KONDO ◽  
KAZUHIKO MIZUNO ◽  
TADASHI KATO
Keyword(s):  
Cell Wall ◽  
Ferulic Acid ◽  
Lolium Multiflorum ◽  
Italian Ryegrass ◽  
Coumaric Acid ◽  
Stages Of Growth ◽  
Cell Wall Polymers ◽  
Cross Links ◽  
Ferulic Acids ◽  
Acid Esters

Cell wall-bound p-coumaric and ferulic acids were determined for stems of Italian ryegrass (Lolium multiflorum Lam.) sampled at different stages of growth. The greater part of the detected p-coumaric acid was linked to cell wall polymers through ester linkages. No definite relationship was found between the accumulation of p-coumaric acid esters and plant maturation. Some part of the detected ferulic acid was simultaneously esterified and etherified to cell wall polymers. Such ester- and ether-linked ferulic acid augmented with increasing maturity, suggesting that the number of ferulic acid cross-links in the cell wall matrices of ryegrass increases with plant maturation.Key words: p-coumaric acid, ferulic acid, Italian ryegrass, cell wall, phenolic acids

scholarly journals Callose: a multifunctional (1, 3)-β–d-glucan involved in morphogenesis and function of angiosperm stomata

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
Panagiotis Apostolakos ◽  
Eleni Giannoutsou ◽  
Basil Galatis
Keyword(s):  
Cell Walls ◽  
Pore Formation ◽  
Cellulose Microfibril ◽  
Vigna Sinensis ◽  
Matrix Cell ◽  
Wall Materials ◽  
Asplenium Nidus ◽  
And Function ◽  
Cell Wall Materials

Abstract Background Although the cellulose microfibril organization in guard cell (GC) walls play a crucial role in the mechanism of the stomatal function, recent work showed that matrix cell wall materials are also involved. Especially in the kidney-shaped stomata of the fern Asplenium nidus, callose actively participates in the mechanism of opening and closure of the stomatal pore. Scope The present review briefly presents and discusses recent findings concerning the distribution and role of callose in the kidney-shaped stomata of the dicotyledon Vigna sinensis as well as in the dumbbell-shaped stomata of the monocotyledon Zea mays. Conclusion The discussed data support that, in both categories of angiosperm stomata, callose is implicated in the mechanism of stomatal pore formation and stomata function by locally affecting the mechanical properties of the GC cell walls.

Time of Harvest and Method of Storage Affect Granulation in Grapefruit

HortScience ◽  
1998 ◽  
Vol 33 (4) ◽  
pp. 728-730 ◽  
Author(s):  
Jacqueline K. Burns ◽  
L. Gene Albrigo
Keyword(s):  
Cell Wall ◽  
Fruit Size ◽  
Tree Age ◽  
Citrus Paradisi ◽  
Marked Accumulation ◽  
Wall Materials ◽  
Time Of Harvest ◽  
Cell Wall Materials

Temporal studies were conducted from mid- to late-harvest season of `Ruby Red' grapefruit (Citrus paradisi Macf.) to evaluate the effect of on- and off-tree storage, fruit size, and juice vesicle position on the development of granulation. Juice vesicle fresh and dry masses were highest at the stem and stylar positions of the fruit section and were not affected significantly by time of harvest or by storage. Juice vesicles isolated from each position were subjectively evaluated for the presence of granulation. Granulation was highest in stylar juice vesicles obtained from large fruit (≈600 g) that were harvested late in the season (March and May) and stored in air at 21 °C for 60 days. Large fruit harvested in March and May and examined immediately, and fruit harvested in January and stored for 60 days had low granulation scores. Thus, fruit remaining on the tree until May are less susceptible to the disorder than those harvested in March and held in storage until May. Levels of alcohol-insoluble solids (AIS), largely composed of pectins and other cell wall materials, were significantly higher in juice vesicles that were granulated. The results suggest that storage itself was not responsible for the marked accumulation of AIS in granulated juice vesicles. Rather, some interaction of fruit size with maturation, as well as other factors such as tree age and rootstock, likely contributed to the development of granulation.

Influence of N Fertilization and N Carryover on Yield and N Concentration of Dactylis glomerata L. 1

1973 ◽  
Vol 65 (4) ◽  
pp. 671-674 ◽  
Author(s):  
S. J. Donohue ◽  
C. L. Rhykerd ◽  
D. A. Holt ◽  
C. H. Noller
Keyword(s):  
Dactylis Glomerata ◽  
N Fertilization ◽  
N Concentration ◽  
Dactylis Glomerata L
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