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Nitrate supply and the biophysics of leaf growth in salix viminalis

Nitrate supply and the biophysics of leaf growth in salix viminalis
Nitrate supply and the biophysics of leaf growth in salix viminalis
The influence of nitrogen on leaf area development and the biophysics of leaf growth was studied using clonal plants of the shrub willow, Salix viminalis grown with either optimal (High N) or sub-optimal (Low N) supplies of nitrate. Leaf growth rate and final leaf size were reduced in the sub-optimal treatment and the data suggest that in young rapidly growing leaves, this was primarily due to changes in cell wall properties, since cell wall extensibility (% plasticity) was reduced in the Low N plants.

The biophysical regulation of leaf cell expansion also differed with nitrogen treatment as leaves aged. In the High N leaves, leaf cell turgor pressure (P) increased with age whilst in the Low N leaves P declined with age, again suggesting that for young leaves, cell wall plasticity limited expansion in the Low N plants. Measurements of cell wall properties showed that cell wall elasticity (%E) was not influenced by nitrogen treatment and remained constant regardless of leaf age.
0022-0957
155-164
Taylor, Gail
f3851db9-d37c-4c36-8663-e5c2cb03e171
McDonald, A.J.S.
abf3fd05-603f-4f0a-8db3-fcea84a706ef
Stadenberg, I.
34b1ef18-faa4-470a-b630-b2794fcec823
Freer Smith, P. H.
9713d9e9-3561-4ebe-950c-1fbe47ca20aa
Taylor, Gail
f3851db9-d37c-4c36-8663-e5c2cb03e171
McDonald, A.J.S.
abf3fd05-603f-4f0a-8db3-fcea84a706ef
Stadenberg, I.
34b1ef18-faa4-470a-b630-b2794fcec823
Freer Smith, P. H.
9713d9e9-3561-4ebe-950c-1fbe47ca20aa

Taylor, Gail, McDonald, A.J.S., Stadenberg, I. and Freer Smith, P. H. (1993) Nitrate supply and the biophysics of leaf growth in salix viminalis. Journal of Experimental Botany, 44 (1), 155-164. (doi:10.1093/jxb/44.1.155).

Record type: Article

Abstract

The influence of nitrogen on leaf area development and the biophysics of leaf growth was studied using clonal plants of the shrub willow, Salix viminalis grown with either optimal (High N) or sub-optimal (Low N) supplies of nitrate. Leaf growth rate and final leaf size were reduced in the sub-optimal treatment and the data suggest that in young rapidly growing leaves, this was primarily due to changes in cell wall properties, since cell wall extensibility (% plasticity) was reduced in the Low N plants.

The biophysical regulation of leaf cell expansion also differed with nitrogen treatment as leaves aged. In the High N leaves, leaf cell turgor pressure (P) increased with age whilst in the Low N leaves P declined with age, again suggesting that for young leaves, cell wall plasticity limited expansion in the Low N plants. Measurements of cell wall properties showed that cell wall elasticity (%E) was not influenced by nitrogen treatment and remained constant regardless of leaf age.

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Published date: 1993

Identifiers

Local EPrints ID: 159893
URI: https://eprints.soton.ac.uk/id/eprint/159893
ISSN: 0022-0957
PURE UUID: 696ebd68-22a5-41bf-bdda-7f04fd790b82
ORCID for Gail Taylor: ORCID iD orcid.org/0000-0001-8470-6390

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Date deposited: 08 Jul 2010 09:23
Last modified: 25 May 2019 00:36

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