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    Author(s): D.H. DeHayes; P.G. Schaberg; G.J. Hawley; C.H. Borer; J.R. Cumming; J.R. Strimbeck
    Date: 1997
    Source: Tree Physiology. 17: 687-695.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: View PDF  (225.7 KB)

    Description

    We examined the pattern of seasonal variation in total foliar calcium (Ca) pools and plasma membrane-associated Ca (mCa) in mesophyll cells of current-year and 1-year-old needles of red spruce (Picea rubens Sarg.) and the relationship between mCa and total foliar Ca on an individual plant and seasonal basis. Foliar samples were collected from seedlings and analyzed on 16 dates at 2- to 3-week intervals between June 1994 and March 1995. Concentrations of mCa in current-year needles were more seasonally dynamic and responsive to temporal environmental changes than either mCa concentrations of 1-year-old needles, which were largely stable, or total foliar Ca concentrations in both tissues.

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    Citation

    DeHayes, D.H.; Schaberg, P.G.; Hawley, G.J.; Borer, C.H.; Cumming, J.R.; Strimbeck, J.R. 1997. Physiological implications of seasonal variation in membrane-associated calcium in red spruce mesophyll cells. Tree Physiology. 17: 687-695.

    Keywords

    cold acclimation, compartmentation, extracellular calcium, frost, Picea rubens, plasma membrane, total foliar calcium, winter thaw

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