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Thursday, July 30, 2020 | History

1 edition of Composition of root pressure exudate from conifers found in the catalog.

Composition of root pressure exudate from conifers

D. O. Ketchie

Composition of root pressure exudate from conifers

by D. O. Ketchie

  • 179 Want to read
  • 34 Currently reading

Published by U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in Portland, Or .
Written in English

    Subjects:
  • Exudates and transudates,
  • Conifers,
  • Root pressure

  • Edition Notes

    StatementD.O. Ketchie and W. Lopushinsky
    SeriesResearch note PNW -- 395, Research note PNW -- 395.
    ContributionsLopushinsky, W., Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    The Physical Object
    Pagination6 p. ;
    ID Numbers
    Open LibraryOL25591796M
    OCLC/WorldCa9167934

      Although the quantities of organic compounds exuding from roots is not large, seldom exceeding % of the carbon photosynthesized, they do exert a very strong influence on the soil microorganisms and may be significant in affecting plant nutrient availability. There is evidence that exudates from the roots of some plants are toxic to roots of neighboring plants and to the germination Cited by: The paper will discuss the character of carbon loss from trees in comparison to annual plants and discuss the increasing evidence of the importance of non-nutrient components of root exudates as host specific recognition signals. The factors affecting exudate release and the impact of these compounds on nutrient availability will be by:

    The xylem also contributes to exudate volume if plants are kept in dim light long enough for the stomata to close, reducing transpiration and allowing the buildup of root pressure. Even if the xylem is under tension, cutting the petiole or stem eliminates transpirational pull and presumably allows root pressure to force water back onto the by:   Similarly, the CK content in root bleeding exudate may not be the same as that in the transpiration stream at the top of the shoot serving the developing fruits. The concentration of solutes in exudate due to root pressure is usually much higher than that of tracheal sap collected by vacuum or pressure displacement from by:

      Plant exudates greatly affect the physical behaviour of soil, but measurements of the impact of exudates on compression characteristics are missing. Our aim is to provide these data and explore how plant exudates may enhance the restructuring of compacted soils following cycles of wetting and drying. Two soils were amended with Chia (Salvia hispanica) seed exudate at 5 concentrations Cited by: 6. Xylem sap was obtained as root pressure exudate at the time of harvest (Jeschke and Pate ; Alexou and Peuke ). The shoot was removed at 2 cm above the soil surface and then around 1 .


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Composition of root pressure exudate from conifers by D. O. Ketchie Download PDF EPUB FB2

Root pressure exudates collected from detopped seedlings of Douglas-fir, grand fir, noble fir, Pacific silver fir, ponderosa pine, lodgepole pine, and Engelmann spruce were analyzed for sugars, amino acids, organic acids, nitrogen, potassium, calcium, and magnesium. Composition of Root Pressure Exudate from Conifers D.O.

Ketchie and W. Lopushinsky Abstract Root pressure exudates collected from detopped seedlings of Douglas-fir, grand fir, noble fir, Pacific silver fir, ponderosa pine, lodgepole pine, and Engelmann spruce were analyzed for sugars, amino acids, organic acids, nitrogen, potassium, calcium and magnesium.

Get this from a library. Composition of root pressure exudate from conifers. [D O Ketchie; W Lopushinsky; Pacific Northwest Forest and Range Experiment Station (Portland, Or.)] -- Verslag van een proef waarbij de chemische samenstelling van het bloedingsap (dat door worteldruk uit onttopte planten wordt geperst) wordt nagegaan van zaailingen van zeven soorten naaldbomen, die.

Title. Composition of root pressure exudate from conifers / Related Titles. Series: Research note PNW ; By. Ketchie, D. Lopushinsky, W. Pacific Northwest.

Composition of root pressure exudate from conifers Author: D O Ketchie ; W Lopushinsky ; Pacific Northwest Forest and Range Experiment Station (Portland, Or.). Composition of root pressure exudate from conifers / By D.

Ketchie, W. Lopushinsky and Or.) Pacific Northwest Forest and Range Experiment Station (Portland Abstract. no Topics: Conifers, Exudates and transudates, Root pressure.

Composition of root pressure exudate from conifers / By D. Ketchie, W. Lopushinsky and Or.) Pacific Northwest Forest and Range Experiment Station (Portland. Topics: Conifers, Exudates Cited by: 3. Root exudates are the product of photosynthesis and act as secondary metabolites.

Root exudates have both positive and negative effect on plants depends on which type of microbes attracted toward the root. Bacteria colonize the root surface and influence the plant growth and by: 4.

Root exudates from some plant species can inhibit potential soil-borne pathogens by releasing allelochemicals, while other promote the growth of pathogens [].

The composition of root exudates from the wilt-susceptible and wilt-resistant plants was different, and had the different impact on the spore germination of F. oxysporum. Root exudates may serve as a selective agent through which a plant is able to regulate the fungal community in the surrounding rhizosphere.

To test the role of root exudates in structuring the soil fungal community, in vitro-grown root exudates from A. thaliana and M. truncatula were applied toCited by:   Exudation of sap was never observed to occur from stumps of detopped seedlings of loblolly pine or white spruce, but measurable exudation occurred from apical root segments, 4 to 8 centimeters long, which were removed from the root systems and observed individually.

Fully suberized root segments of loblolly pine exuded as much or more sap than unsuberized by: 8. The xylem also contributes to exudate volume if plants are kept in dim light long enough for the stomata to close, reducing transpiration and allowing the buildup of root pressure.

Even if the xylem is under tension, cutting the petiole or stem eliminates transpirational pull and presumably allows root pressure to force water back onto the surface.

Plant root exudates consist of a complex mixture of organic acid anions, phytosiderophores, sugars, vitamins, amino acids, purines, nucleosides, inorganic ions (e.g. HCO3 –, OH–, H+), gaseous. Composition of root pressure exudate from conifers / (Portland, Or.: U.S.

Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, []), by D. Ketchie, W. Lopushinsky, and Or.). Qualitative composition of water-soluble root exudates and exudation rate are commonly measured with the aim of consequent synthetic preparation of plant root exudates to be supplied to soil to create artifi cial rhizosphere for diff erent experimental purposes.

Composition of root pressure exudate from conifers / View Metadata By: Ketchie, D. - Lopushinsky, W. - Pacific Northwest Forest and Range Experiment Station (Portland, Or.). On most conifers, make a thin slice or wound on one side of the cutting. The wound should be about 3/4 inch long, and extend from the basal end upward.

This wound will encourage stronger root development on conifers. The finished cutting should be 3. 'Root Pressure'. It is the transverse osmotic pressure within the cells of a root system that causes sap to rise through a plant stem to the leaves. Root pressure occurs in the xylem of some vascular plants when the soil moisture level is high either at night or when transpiration is low during the day.

Root pressure exudate, collected from Spirea arguta Zab. in the spring, was found to contain tryptophan and adenine. Tryptophan was identified by co-chromatography, amino acid analysis, UV-spectroscopy and mass by: 3. Composition Of Root Pressure Exudate From Conifers 1 United States Department of Agriculture Forest Service Pacific Northwest Forest and Range Experiment Station Research Note PNW October Composition of Root Pressure Exudate from Conifers D.O.

Ketchie and W. Lopushinsky Abstract Root pressure exudates collected from detopped seedlings. Root pressure is studied by removing the shoot of a plant near the soil level.

Xylem sap will exude from the cut stem for hours or days due to root pressure. If a pressure .Vol no Composition of root pressure exudate from conifers by Ketchie, D.

O; Lopushinsky, W; Pacific Northwest Forest and Range Experiment Station (Portland, Or.).A nice winter work is to make or alleged to remove the "dwarf" copies that beset the rest of the border trees. The problem is that the root from the soil, in order for the appropriate place in the bed can be planted again.

So here is a guide, especially for conifers, as one finds out the root in one go.