Abstract
The aim of the project was to study the formation and accumulation of the phytohormone abscisic acid and soluble phenolic compounds and terpenes in spruce and fir needles with a view to various parameters (season, needle age, degree of damage, distribution within the tree crown, and site altitude), in the Wank forest under field conditions. For the extraction and clean-up of abscisic acid (ABA) a method by Doerffling was modified, and for its quantitative analysis ELISA, HPLC, GC with flame ionization and GC with electron capturing detector were tested and the latter chosen. In individual trees needles from the crown top had increased ABA content; needle age and degree of damage had no significant effect; the year curve showed a maximum in May/June and a minimum in August/September. As regards some soluble phenolic compounds, young needles, unlike older ones, have a year curve; the concentrations of some SPCs increase with altitude above mean sea level (ultraviolet radiation protection function, ozone effect possible but not confirmed), while the concentrations of some monoterpenes go down. Young needles (of cloned spruces) have no day curve for monoterpenes, but their concentration increases where water is scarce. The degree of damage (chlorotic needles, loss of
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Citation Formats
Ziegler, H, Kraus, M, and Deigele, C.
Forest decline: Verification of phytohormones and secondary plant constituents (especially flavonoids and sesquiterpenes) in healthy and damaged needles from a natural site (Wank) with a defined pollutant load and defined infectious diseases (continuation). Final report. Waldschaeden: Nachweis von Phytohormonen und sekundaeren Pflanzenstoffen (vor allem Flavonoiden und Sesquiterpenen) in gesunden und geschaedigten Nadeln vom natuerlichen Standort (Wank), bei definierter Schadstoffbelastung und definierten Infektionskrankheiten (Fortsetzung). Abschlussbericht.
Germany: N. p.,
1992.
Web.
Ziegler, H, Kraus, M, & Deigele, C.
Forest decline: Verification of phytohormones and secondary plant constituents (especially flavonoids and sesquiterpenes) in healthy and damaged needles from a natural site (Wank) with a defined pollutant load and defined infectious diseases (continuation). Final report. Waldschaeden: Nachweis von Phytohormonen und sekundaeren Pflanzenstoffen (vor allem Flavonoiden und Sesquiterpenen) in gesunden und geschaedigten Nadeln vom natuerlichen Standort (Wank), bei definierter Schadstoffbelastung und definierten Infektionskrankheiten (Fortsetzung). Abschlussbericht.
Germany.
Ziegler, H, Kraus, M, and Deigele, C.
1992.
"Forest decline: Verification of phytohormones and secondary plant constituents (especially flavonoids and sesquiterpenes) in healthy and damaged needles from a natural site (Wank) with a defined pollutant load and defined infectious diseases (continuation). Final report. Waldschaeden: Nachweis von Phytohormonen und sekundaeren Pflanzenstoffen (vor allem Flavonoiden und Sesquiterpenen) in gesunden und geschaedigten Nadeln vom natuerlichen Standort (Wank), bei definierter Schadstoffbelastung und definierten Infektionskrankheiten (Fortsetzung). Abschlussbericht."
Germany.
@misc{etde_6700623,
title = {Forest decline: Verification of phytohormones and secondary plant constituents (especially flavonoids and sesquiterpenes) in healthy and damaged needles from a natural site (Wank) with a defined pollutant load and defined infectious diseases (continuation). Final report. Waldschaeden: Nachweis von Phytohormonen und sekundaeren Pflanzenstoffen (vor allem Flavonoiden und Sesquiterpenen) in gesunden und geschaedigten Nadeln vom natuerlichen Standort (Wank), bei definierter Schadstoffbelastung und definierten Infektionskrankheiten (Fortsetzung). Abschlussbericht}
author = {Ziegler, H, Kraus, M, and Deigele, C}
abstractNote = {The aim of the project was to study the formation and accumulation of the phytohormone abscisic acid and soluble phenolic compounds and terpenes in spruce and fir needles with a view to various parameters (season, needle age, degree of damage, distribution within the tree crown, and site altitude), in the Wank forest under field conditions. For the extraction and clean-up of abscisic acid (ABA) a method by Doerffling was modified, and for its quantitative analysis ELISA, HPLC, GC with flame ionization and GC with electron capturing detector were tested and the latter chosen. In individual trees needles from the crown top had increased ABA content; needle age and degree of damage had no significant effect; the year curve showed a maximum in May/June and a minimum in August/September. As regards some soluble phenolic compounds, young needles, unlike older ones, have a year curve; the concentrations of some SPCs increase with altitude above mean sea level (ultraviolet radiation protection function, ozone effect possible but not confirmed), while the concentrations of some monoterpenes go down. Young needles (of cloned spruces) have no day curve for monoterpenes, but their concentration increases where water is scarce. The degree of damage (chlorotic needles, loss of needles) and SPC, monoterpene and sesquiterpene levels are not associated. (orig.)}
place = {Germany}
year = {1992}
month = {Mar}
}
title = {Forest decline: Verification of phytohormones and secondary plant constituents (especially flavonoids and sesquiterpenes) in healthy and damaged needles from a natural site (Wank) with a defined pollutant load and defined infectious diseases (continuation). Final report. Waldschaeden: Nachweis von Phytohormonen und sekundaeren Pflanzenstoffen (vor allem Flavonoiden und Sesquiterpenen) in gesunden und geschaedigten Nadeln vom natuerlichen Standort (Wank), bei definierter Schadstoffbelastung und definierten Infektionskrankheiten (Fortsetzung). Abschlussbericht}
author = {Ziegler, H, Kraus, M, and Deigele, C}
abstractNote = {The aim of the project was to study the formation and accumulation of the phytohormone abscisic acid and soluble phenolic compounds and terpenes in spruce and fir needles with a view to various parameters (season, needle age, degree of damage, distribution within the tree crown, and site altitude), in the Wank forest under field conditions. For the extraction and clean-up of abscisic acid (ABA) a method by Doerffling was modified, and for its quantitative analysis ELISA, HPLC, GC with flame ionization and GC with electron capturing detector were tested and the latter chosen. In individual trees needles from the crown top had increased ABA content; needle age and degree of damage had no significant effect; the year curve showed a maximum in May/June and a minimum in August/September. As regards some soluble phenolic compounds, young needles, unlike older ones, have a year curve; the concentrations of some SPCs increase with altitude above mean sea level (ultraviolet radiation protection function, ozone effect possible but not confirmed), while the concentrations of some monoterpenes go down. Young needles (of cloned spruces) have no day curve for monoterpenes, but their concentration increases where water is scarce. The degree of damage (chlorotic needles, loss of needles) and SPC, monoterpene and sesquiterpene levels are not associated. (orig.)}
place = {Germany}
year = {1992}
month = {Mar}
}