The trace and major element composition of the leaves of some deciduous trees

Guha, M. M.; Mitchell, R. L.

doi:10.1007/bf01373076

Cited by 146 publications

(45 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The major portion of the leaf N is in Rubisco and other photo-and biochemical machinery involved in photosynthesis (Dietz and Harris 1997). The decline in N mass is not the result of its loss or resorption from leaves, but primarily of dilution due to the large increase in dry mass at that period of time (Guha and Mitchell 1966). The plateau of N mass observed from the beginning of June until the end of August (Fig.…”

Section: Nutrientsmentioning

confidence: 99%

Ontogenetic patterns of leaf CO2 exchange, morphology and chemistry in Betula pendula trees

Oleksyn¹,

Żytkowiak

Tjoelker

et al. 2000

Trees

View full text Add to dashboard Cite

In order to explore ontogenetic variation in leaf-level physiological traits of Betula pendula trees, we measured changes in mass-(A mass ) and area-based (A area ) net photosynthesis under light-saturated conditions, mass-(RS mass ) and area-based (RS area ) leaf respiration, relative growth rate, leaf mass per area (LMA), total nonstructural carbohydrates (TNC), and macro-and micronutrient concentrations. Expanding leaves maintained high rates of A area , but due to high growth respiration rates, net CO 2 fixation occurred only at irradiances >200 µmol photons m -2 s -1 . We found that full structural leaf development is not a necessary prerequisite for maintaining positive CO 2 balance in young birch leaves. Maximum rates of A area were realized in late June and early July, whereas the highest values of A mass occurred in May and steadily declined thereafter. The maintenance respiration rate averaged ≈8 nmol CO 2 g -1 s -1 , whereas growth respiration varied between 0 and 65 nmol CO 2 g -1 s -1 . After reaching its lowest point in mid-June, leaf respiration increased gradually until the end of the growing season. Mass and area-based dark respiration were significantly positively correlated with LMA at stages of leaf maturity, and senescence. Concentrations of P and K decreased during leaf development and stabilized or increased during maturity, and concentrations of immobile elements such as Ca, Mn and B increased throughout the growing season. Identification of interrelations between leaf development, CO 2 exchange, TNC and leaf nutrients allowed us to define factors related to ontogenetic variation in leaf-level physiological traits and can be helpful in establishing periods appropriate for sampling birch leaves for diagnostic purposes such as assessment of plant and site productivity or effects of biotic or abiotic factors.

show abstract

Section: Nutrientsmentioning

confidence: 99%

Ontogenetic patterns of leaf CO2 exchange, morphology and chemistry in Betula pendula trees

Oleksyn¹,

Żytkowiak

Tjoelker

et al. 2000

Trees

View full text Add to dashboard Cite

show abstract

“…The stems of ash tree leaves (Fraxinus americana and F. nigra), for example, show much smaller mercury levels compared to their leaf blades ). This also applies to a number of, but not all, metals in leaves of beech, horse-chestnut, maple and poplar (Reijonen and Nuorteva, 1993;Guha and Mitchell, 1966). In leaves which have a considerable proportion of stem-mass, including stems into the sample can change the concentration of leaf substances, thereby causing systematic errors.…”

Section: ×mentioning

confidence: 95%

“…Because the assessments were conducted separately for the age classes, there were many indications of a dependency of substance concentrations on age, or on the exposure time of the sample material. This factor was also systematically studied in some older publications (Guha and Mitchell, 1966;Schleppi et al, 2000;Wyttenbach et al, 1991Wyttenbach et al, , 1995. Chemical elements like manganese and zinc, for example, behave in a very different manner.…”

Section: ×mentioning

confidence: 96%

“…Furthermore, studies concerning the pollutant burden of leaves of varying age, indicate the importance of the sampling period (Guha and Mitchell, 1966;Schleppi et al, 2000;Wyttenbach et al, 1991Wyttenbach et al, , 1995. In one study, researching the spatio-temporal variation of PAHs in black pine needles in the greater Cologne area (Germany), clear differences could be observed at most sampling sites between summer and winter samples ).…”

Section: ×mentioning

confidence: 96%

See 1 more Smart Citation

Toward standardization of sample collection and preservation for the quality of results in biomonitoring with trees – A critical review

Tarricone

Wagner

Klein

2015

Ecological Indicators

View full text Add to dashboard Cite

“…Over agricultural terrain Landsat Thematic Mapper data from the early part of the growing season provided the best discrimination results (Drury 1986a). In this area the cycling of heavy metals in plants is also at its greatest in the month of May (Guha and Mitchell 1966). In this regard, therefore, the fact that the ATM data we have used were acquired in May is ideal.…”

Section: Introductionmentioning

confidence: 98%

Geobotanical application of Airborne Thematic Mapper data in Sutherland, north-west Scotland

Saraf

Cracknell

McManus

1989

International Journal of Remote Sensing

View full text Add to dashboard Cite

Geobotanical remote sensing techniques have been applied in studies of the geological characteristics of the Assynt area of Sutherland, Scotland. Airborne Thematic Mapper (ATM) data were used to evaluate the geobotanical utility of the multispectral information recorded in the visible and reflected infrared bands with respect to mineral exploration. The main aims of this study were, first, to evaluate remote-sensing techniques for the detection of stressed vegetation due to underlying mineral deposits and, secondly, to study the possibilities of using ATM data for lithology and structural mapping under existing natural conditions. Of the eleven multi-spectral bands, differences in canopy physiognomy characteristics may partially control the spectral response in bands 5,7 and 9. Band 7 in the near-infrared wavelength region, however, has the contrasting effect of apparently enhancing topography and reducing the spectral effect of vegetation. This perniits the recognition of a number of linear features on the band 7 image which may be interpreted in terms of structural geology. Several small-scale previously unrecognized lineaments which run in the NWW-SEE direction parallel to other known basic dykes in Lewisian Gneiss have been recognized. Stressed vegetation near Ledmore, north-west of Loch Borrolan, has been identified.

show abstract

The trace and major element composition of the leaves of some deciduous trees

Cited by 146 publications

References 15 publications

Ontogenetic patterns of leaf CO2 exchange, morphology and chemistry in Betula pendula trees

Ontogenetic patterns of leaf CO2 exchange, morphology and chemistry in Betula pendula trees

Toward standardization of sample collection and preservation for the quality of results in biomonitoring with trees – A critical review

Geobotanical application of Airborne Thematic Mapper data in Sutherland, north-west Scotland

Contact Info

Product

Resources

About