We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
The effect of drought on C and N stable isotopes in different fractions of leaves, stems and roots of sensitive and tolerant beech ecotypes.
- Authors
Peuke, A. D.; Gessler, A.; Rennenberg, H.
- Abstract
Beech seedlings from 11 German climatic provenances were exposed to a realistically timed drought treatment in a greenhouse experiment. The stable isotope composition of carbon (C) and nitrogen (N) was analysed in pooled bulk material of roots, stems and leaves, as well as in the aqueous extracts and starch fractions. The δ13C values increased in bulk samples (BS) of roots, stems and leaves by drought, although no leaf growth occurred during the experimental period. A clear drought effect on δ13C in aqueous extracts was detected in leaves. In aqueous extracts of stems and roots as well as in starch fractions of all organs, abundance of δ13C also tended to be increased by drought, but this effect was not statistically significant. For both δ13C and δ15N, enrichment was observed from the site of uptake/source to the site of use/sink. A gradient for δ13C in all fractions from leaves (−29.49, −28.89 and −27.85‰) to stems (−28.81, −27.48 and −26.98‰) and to roots (−27.60, −26.37 and −26.48‰) was detected in BS, aqueous extracts and starch, respectively. An opposite gradient for δ15N was found in BS: 1.59‰, 1.84‰ and 3.05‰ in roots, stems and leaves, respectively. δ15N was neither affected by drought in the BS nor in aqueous extracts, but an effect of provenance was observed. Particularly in roots and stems, drought-sensitive provenances showed the strongest shifts in δ13C induced by drought and the lowest δ15N values. In the present experiment, δ13C values were more affected by the environmental factor drought, while δ15N values were more affected by the genetic factor provenance.
- Subjects
EFFECT of drought on plants; CARBON; NITROGEN; STABLE isotopes; NUCLIDES; BEECH; FAGACEAE; DICOTYLEDONS; BOTANY
- Publication
Plant, Cell & Environment, 2006, Vol 29, Issue 5, p823
- ISSN
0140-7791
- Publication type
Article
- DOI
10.1111/j.1365-3040.2005.01452.x