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Sex-related differences in growth and carbon allocation to defence in Populus tremula as explained by current plant defence theories.

Publication ,  Journal Article
Randriamanana, TR; Nybakken, L; Lavola, A; Aphalo, PJ; Nissinen, K; Julkunen-Tiitto, R
Published in: Tree physiology
May 2014

Plant defence theories have recently evolved in such a way that not only the quantity but also the quality of mineral nutrients is expected to influence plant constitutive defence. Recently, an extended prediction derived from the protein competition model (PCM) suggested that nitrogen (N) limitation is more important for the production of phenolic compounds than phosphorus (P). We aimed at studying sexual differences in the patterns of carbon allocation to growth and constitutive defence in relation to N and P availability in Populus tremula L. seedlings. We compared the gender responses in photosynthesis, growth and whole-plant allocation to phenolic compounds at different combination levels of N and P, and studied how they are explained by the main plant defence theories. We found no sexual differences in phenolic concentrations, but interestingly, slow-growing females had higher leaf N concentration than did males, and genders differed in their allocation priority. There was a trade-off between growth and the production of flavonoid-derived phenylpropanoids on one hand, and between the production of salicylates and flavonoid-derived phenylpropanoids on the other. Under limited nutrient conditions, females prioritized mineral nutrient acquisition, flavonoid and condensed tannin (CT) production, while males invested more in above-ground biomass. Salicylate accumulation followed the growth differentiation balance hypothesis as low N mainly decreased the production of leaf and stem salicylate content while the combination of both low N and low P increased the amount of flavonoids and CTs allocated to leaves and to a lesser extent stems, which agrees with the PCM. We suggest that such a discrepancy in the responses of salicylates and flavonoid-derived CTs is linked to their clearly distinct biosynthetic origins and/or their metabolic costs.

Published In

Tree physiology

DOI

EISSN

1758-4469

ISSN

0829-318X

Publication Date

May 2014

Volume

34

Issue

5

Start / End Page

471 / 487

Related Subject Headings

  • Seedlings
  • Populus
  • Plant Shoots
  • Plant Leaves
  • Plant Biology & Botany
  • Photosynthesis
  • Phosphorus
  • Phenols
  • Nitrogen
  • Minerals
 

Citation

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ICMJE
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Randriamanana, T. R., Nybakken, L., Lavola, A., Aphalo, P. J., Nissinen, K., & Julkunen-Tiitto, R. (2014). Sex-related differences in growth and carbon allocation to defence in Populus tremula as explained by current plant defence theories. Tree Physiology, 34(5), 471–487. https://doi.org/10.1093/treephys/tpu034
Randriamanana, Tendry R., Line Nybakken, Anu Lavola, Pedro J. Aphalo, Katri Nissinen, and Riitta Julkunen-Tiitto. “Sex-related differences in growth and carbon allocation to defence in Populus tremula as explained by current plant defence theories.Tree Physiology 34, no. 5 (May 2014): 471–87. https://doi.org/10.1093/treephys/tpu034.
Randriamanana TR, Nybakken L, Lavola A, Aphalo PJ, Nissinen K, Julkunen-Tiitto R. Sex-related differences in growth and carbon allocation to defence in Populus tremula as explained by current plant defence theories. Tree physiology. 2014 May;34(5):471–87.
Randriamanana, Tendry R., et al. “Sex-related differences in growth and carbon allocation to defence in Populus tremula as explained by current plant defence theories.Tree Physiology, vol. 34, no. 5, May 2014, pp. 471–87. Epmc, doi:10.1093/treephys/tpu034.
Randriamanana TR, Nybakken L, Lavola A, Aphalo PJ, Nissinen K, Julkunen-Tiitto R. Sex-related differences in growth and carbon allocation to defence in Populus tremula as explained by current plant defence theories. Tree physiology. 2014 May;34(5):471–487.
Journal cover image

Published In

Tree physiology

DOI

EISSN

1758-4469

ISSN

0829-318X

Publication Date

May 2014

Volume

34

Issue

5

Start / End Page

471 / 487

Related Subject Headings

  • Seedlings
  • Populus
  • Plant Shoots
  • Plant Leaves
  • Plant Biology & Botany
  • Photosynthesis
  • Phosphorus
  • Phenols
  • Nitrogen
  • Minerals