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Labarrere B., Prinzing A., Chesneau E. & Hennion F. |
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Polyamine variation across natural gradients and influence on plant development in subantarctic plant species.
2015 Society for Experimental Biology Annual Meeting, Prague, Czech Republic, 30th June- 03rd July. |
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Conference - International - Communication |
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2015 |
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Metabolites are involved in plant development and hence play an important role in adjustment to climate change. Polyamines are a class of metabolites at the interface between environment and growth control in plants. However, there is still much uncertainty to what extent polyamines influence plant development in nature. Also, there is evidence that polyamines help plants to sustain stressful environmental conditions. However, the roles of polyamines for plants to sustain stress have been studied in model species or under single stresses and we don’t know whether results are extensible to other species and combined stresses found in the field.
Plants in Iles Kerguelen are adapted to conditions including low temperatures and abundant rainfall. However, Iles Kerguelen are subject to rapid and intense climate change such as enhanced temperature and decreased rainfall. These changes are expected to increase stress in plants, especially in wetlands.
We study three Ranunculus species from Kerguelen wetlands across natural environmental gradients and ask: (i) is polyamine composition determined by environment in the field? (ii) is polyamine response to a given environmental gradient consistent across species? (iii) how is polyamine composition related to plant development ? (iv) do these field observations match with known polyamine roles in response to stress and growth control?
Results show that polyamine composition varies across environmental gradients. However, relationship between polyamine composition and environment depends on both species and type of gradient. We show a relationship between polyamines and plant development. However, polyamines are related with different morphological characteristics depending on species.
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1116 |
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yes |
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6115 |
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