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Titolo:
ORGANIC AND INORGANIC SULFUR TRANSPORT IN THE XYLEM SAP AND THE SULFUR BUDGET OF PICEA-ABIES TREES
Autore:
KOSTNER B; SCHUPP R; SCHULZE ED; RENNENBERG H;
Indirizzi:
UNIV BAYREUTH,BAYREUTHER INST TERR OKOSYSTEMFORSCHUNG,LEHRSTUHL PFLANZENOKOL 2 D-95440 BAYREUTH GERMANY UNIV BAYREUTH,LEHRSTUHL PFLANZENOKOL 1 D-95440 BAYREUTH GERMANY FRAUNHOFER INST ATMOSPHAR UMWELTFORSCH D-82467 GARMISCH PARTENKI GERMANY UNIV FREIBURG,INST FORSTBOT AND BAUMPHYSIOL D-79085 FREIBURG GERMANY
Titolo Testata:
Tree physiology
fascicolo: 1, volume: 18, anno: 1998,
pagine: 1 - 9
SICI:
0829-318X(1998)18:1<1:OAISTI>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
FAGUS-SYLVATICA L; LONG-DISTANCE TRANSPORT; WATER-VAPOR FLUX; L KARST STANDS; CANOPY CONDUCTANCE; SPRUCE NEEDLES; AMINO-ACIDS; SCOTS PINE; SO2; NUTRITION;
Keywords:
CYSTEINE; GLUTATHIONE; METHIONINE; NORWAY SPRUCE; S NUTRITION; SO2 UPTAKE; SULFATE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
54
Recensione:
Indirizzi per estratti:
Citazione:
B. Kostner et al., "ORGANIC AND INORGANIC SULFUR TRANSPORT IN THE XYLEM SAP AND THE SULFUR BUDGET OF PICEA-ABIES TREES", Tree physiology, 18(1), 1998, pp. 1-9

Abstract

Temporal changes in inorganic and organic sulfur compounds (sulfate, glutathione, cysteine, methionine) were analyzed in xylem sap of 40-year-old Norway spruce (Picea abies (L. ) Karst.) trees growing on acidicsoils at a healthy and a declining stand in the Fichtelgebirge (NorthBavaria, Germany). Studies were carried out (1) to quantify glutathione (GSH) transport in the xylem of spruce, (2) to study the significance of reduced sulfur versus sulfate (SO42-) transport in the xylem, and (3) to compare total sulfur (S) transport in the xylem with the amount of foliar uptake of SO2 in an air-polluted environment. Glutathionewas the main reduced S compound in the xylem ranging in concentrationfrom 0.5 to 5 mu mol l(-1). Concentrations of inorganic SO42- in the xylem sap were up to 50 times higher than those of GSH ranging from 60to 230 mu mol l(-1). During the growing season, concentrations of allS compounds in the xylem were highest in May (up to 246 mu mol l(-1))and decreased during summer and fall (up to 21 mu mol l(-1)). On average, SO42- concentrations in xylem sap were 30% higher at the declining site compared with the healthy site. Diurnal changes in organic S compounds were significant for GSH and cysteine with high concentrationsduring the night and low concentrations during the day. Diurnal changes in inorganic SO42- concentrations were not significant. Xylem sap concentrations of SO42- and cysteine were twice as high and GSH concentrations were tenfold higher in surface roots than in branches. At bothsites, transport of organic S was low (up to 3 % of total S) comparedto transport of SO42-. Annual transport of total S in the xylem (SO42- was the main component) ranged from 60 to 197 mmol tree(-1) year(-1)at the healthy site and from 123 to 239 mmol tree(-1) year(-1) at thedeclining site. Although gaseous uptake of SO2 was estimated to be similar at both sites (38 mmol tree(-1) year(-1); Horn et al. 1989), theratio between annual gaseous uptake of SO2 and transport of S in the xylem was 1:4 and 1:5 at the healthy and declining sites, respectively.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 13/07/20 alle ore 08:04:07