Size-mediated ageing reduces vigour in trees

M. Mencuccini, J. Martínez-Vilalta, Dirk Vanderklein, H. A. Hamid, E. Korakaki, S. Lee, B. Michiels

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221 Citations (Scopus)

Abstract

There is increasing interest in understanding the costs and benefits of increased size and prolonged lifespan for plants. Some species of trees can grow more than 100 m in height and can live for several millennia, however whether these achievements are obtained at the cost of some other physiological functions is currently unclear. As increases in size are usually associated with ageing, it is also unclear whether observed reductions in growth rates and increased mortality rates are a function of size or of age per se. One theory proposes that reduced growth after the start of the reproductive phase is caused by cellular senescence. A second set of theories has focussed instead on plant size and the increased respiratory burdens or excessive height. We report on experimental manipulations to separate the effects of extrinsic factors such as size from those of intrinsic factors such as age for four tree species of contrasting phylogeny and life history. For each species, we measured growth, gas exchange and leaf biochemical properties for trees of different ages and sizes in the field and on propagated material obtained from the same genetic individuals but now all of small similar size in our common gardens. For all species, evidence indicated that size, not cellular senescence, accounted for the observed age-related declines in relative growth rates and net assimilation rates. Two species exhibited evidence of genetic control on leaf characters such as specific leaf area, although size also exerted an independent, and stronger, effect. We found partial support for the theory of hydraulic limitations to tree growth. The lack of a marked separation of soma and germline, an unlimited proliferation potential of meristem cells and the exponential increase in reproductive effort with size all help explain the lack of a senescence-induced decline in trees. It is possible that trees much older than the ones we sampled exhibit senescence symptoms.

Original languageEnglish
Pages (from-to)1183-1190
Number of pages8
JournalEcology Letters
Volume8
Issue number11
DOIs
StatePublished - 1 Nov 2005

Fingerprint

vigor
senescence
net assimilation rate
tree age
meristems
tree growth
growth retardation
signs and symptoms (plants)
gardens
gas exchange
leaves
germ cells
fluid mechanics
leaf area
life history
phylogeny
reproductive effort
garden
cells
cell senescence

Keywords

  • Age-related decline in productivity
  • Ageing
  • Ash
  • Hydraulic limitation
  • Poplar
  • Scots pine
  • Senescence
  • Sycamore

Cite this

Mencuccini, M., Martínez-Vilalta, J., Vanderklein, D., Hamid, H. A., Korakaki, E., Lee, S., & Michiels, B. (2005). Size-mediated ageing reduces vigour in trees. Ecology Letters, 8(11), 1183-1190. https://doi.org/10.1111/j.1461-0248.2005.00819.x
Mencuccini, M. ; Martínez-Vilalta, J. ; Vanderklein, Dirk ; Hamid, H. A. ; Korakaki, E. ; Lee, S. ; Michiels, B. / Size-mediated ageing reduces vigour in trees. In: Ecology Letters. 2005 ; Vol. 8, No. 11. pp. 1183-1190.
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Mencuccini, M, Martínez-Vilalta, J, Vanderklein, D, Hamid, HA, Korakaki, E, Lee, S & Michiels, B 2005, 'Size-mediated ageing reduces vigour in trees', Ecology Letters, vol. 8, no. 11, pp. 1183-1190. https://doi.org/10.1111/j.1461-0248.2005.00819.x

Size-mediated ageing reduces vigour in trees. / Mencuccini, M.; Martínez-Vilalta, J.; Vanderklein, Dirk; Hamid, H. A.; Korakaki, E.; Lee, S.; Michiels, B.

In: Ecology Letters, Vol. 8, No. 11, 01.11.2005, p. 1183-1190.

Research output: Contribution to journalArticleResearchpeer-review

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AU - Lee, S.

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Mencuccini M, Martínez-Vilalta J, Vanderklein D, Hamid HA, Korakaki E, Lee S et al. Size-mediated ageing reduces vigour in trees. Ecology Letters. 2005 Nov 1;8(11):1183-1190. https://doi.org/10.1111/j.1461-0248.2005.00819.x