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Titolo:
DOES NITROGEN-FERTILIZATION HAVE AN IMPACT ON THE TRADE-OFF BETWEEN WILLOW GROWTH AND DEFENSIVE SECONDARY METABOLISM
Autore:
HAKULINEN J; JULKUNENTIITTO R; TAHVANAINEN J;
Indirizzi:
UNIV JOENSUU,DEPT BIOL,POB 111 SF-80101 JOENSUU FINLAND
Titolo Testata:
Trees
fascicolo: 4, volume: 9, anno: 1995,
pagine: 235 - 240
SICI:
0931-1890(1995)9:4<235:DNHAIO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Keywords:
CLONAL VARIATION; CNB-HYPOTHESIS; SALIX MYRSINIFOLIA; SECONDARY PHENOLICS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
NO
Recensione:
Indirizzi per estratti:
Citazione:
J. Hakulinen et al., "DOES NITROGEN-FERTILIZATION HAVE AN IMPACT ON THE TRADE-OFF BETWEEN WILLOW GROWTH AND DEFENSIVE SECONDARY METABOLISM", Trees, 9(4), 1995, pp. 235-240

Abstract

The effect of nitrogen fertilization on the phytomass production, shoot length and leaf secondary phenolics in nine Salix myrsinifolia clones was investigated. Cuttings taken from 1-year-old and 2-year-old shoot parts of field cultivated clones were grown at three concentrationsof nitrogen (7, 150 and 300 ppm) in a greenhouse for one growing season. The willow clones differed significantly in phytomass yield and secondary phenolics content. Nitrogen fertilization affected significantly the growth and secondary metabolism of willow clones. In most clones, the addition of nitrogen from a sub-optimum concentration (7 ppm) to an optimum concentration (150 ppm) appeared to reduce the amounts ofsalicortin, chlorogenic acid and unknown salicylate and increased shoot phytomass, but a supra-optimum nitrogen concentration (300 ppm) resulted in highly variable growth and secondary phenolic responses. A significantly negative correlation between leaf phytomass and amount of total phenolics at sub-optimum and optimum N-treatments indicates trade-off between growth and secondary metabolism in willow clones at these treatments. However, the leaf phytomass:total amount of phenolics ratio varied significantly among clones, and in all clones it was not significantly lower at sub-optimum N-treatment than at optimum N-treatment.

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Documento generato il 27/11/20 alle ore 13:12:58