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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Elevated CO2 atmosphere promotes plant growth and inulin production in the cerrado species Vernonia herbacea

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Oliveira, Vanessa F. [1] ; Zaidan, Lilian B. P. [1] ; Braga, Marcia R. [1] ; Aidar, Marcos P. M. [1] ; Carvalho, Maria Angela M. [1]
Total Authors: 5
[1] Inst Bot, Secao Fisiol & Bioquim Plantas, BR-01061970 Sao Paulo - Brazil
Total Affiliations: 1
Document type: Journal article
Source: FUNCTIONAL PLANT BIOLOGY; v. 37, n. 3, p. 223-231, 2010.
Web of Science Citations: 26

Carbon allocation in biomass is an important response of plants to the increasing atmospheric {[}CO(2)]. The effects of elevated {[}CO(2)] are scarcely reported in fructan-accumulating plants and even less in tropical wild species storing this type of carbohydrate. In the present study, the effects of high {[}CO(2)] atmosphere was evaluated on growth, biomass allocation and fructan metabolism in Vernonia herbacea (Vell.) Rusby, an Asteraceae from the Brazilian cerrado, which accumulates inulin-type fructans in the underground organs (rhizophores). Plants were cultivated for 120 days in open-top chambers (OTCs) under ambient (similar to 380 mu mol mol(-1)), and elevated (similar to 760 mu mol mol(-1)) {[}CO(2)]. Plant growth, photosynthesis, fructan contents, and the activities of fructan metabolising enzymes were analysed in the rhizophores at Time 0 and 15, 30, 60, 90 and 120 days. Plants under elevated {[}CO(2)] presented increases in height (40%), photosynthesis (63%) and biomass of aerial (32%) and underground (47%) organs when compared with control plants. Under elevated {[}CO(2)] plants also presented higher 1-SST, 1-FFT and invertase activities and lower 1-FEH activity. Although fructan concentration remained unchanged, fructan productivity was higher in plants maintained under elevated {[}CO(2)], due to their higher rhizophore biomass. This is the first report on the effects of elevated {[}CO(2)] on a plant species bearing underground organs that accumulate fructans. Our results indicate that plants of V. herbacea can benefit from elevated atmospheric {[}CO(2)] by increasing growth and carbon allocation for the production of inulin, and may contribute to predict a future scenario for the impact of this atmospheric condition on the herbaceous vegetation of the cerrado. (AU)

FAPESP's process: 05/04139-7 - Carbohydrates of tropical species as modulators of ecophysiological processes and as environmental stress response markers
Grantee:Marcia Regina Braga
Support type: Research Projects - Thematic Grants
FAPESP's process: 07/59782-7 - Interaction between the atmosphere enriched in CO2 and the water deficit: effects on the growth and the metabolism of fructans in Vernonia herbaceae (Vell.) Rusby
Grantee:Vanessa Fátima de Oliveira
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 98/05124-8 - Conservation and sustainable use of the plant biodiversity from the cerrado and Atlantic Forest: the storage of carbohydrates and their role on the adaptation and maintainance of plants in their natural environment
Grantee:Marcos Silveira Buckeridge
Support type: BIOTA-FAPESP Program - Thematic Grants