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| Oliveira,Adilson Serafim de; Ferreira,Cristiane Silva; Graciano-Ribeiro,Dalva; Franco,Augusto César. |
| Wetlands are common in the Cerrado (Brazilian savannas) biome, however flooding of these wetlands impairs growth and development of most plants. We evaluated flood tolerance of typical Cerrado trees. Seedlings of Aspidosperma macrocarpon (Apocynaceae), Tabebuia rosea (Bignoniaceae), Handroanthus chrysotrichus (Bignoniaceae), Myracrodruon urundeuva (Anacardiaceae), Kielmeyera coriacea (Calophyllaceae) and Copaifera langsdorffii (Fabaceae) were flooded up to the stem base for 30 days. Stems with cortical cracks, secondary aerenchyma and hypertrophic lenticels were observed in flooded plants of M. urundeuva,H. chrysotrichus and T. rosea while adventitious roots were formed in flooded plants of T. rosea and H. chrysotrichus. However, only T. rosea developed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aerenchyma; Biomass partitioning; Flood tolerance; Hypoxia; Water stress. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400478 |
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| ROGGE,G.D.; PIMENTA,J.A.; BIANCHINI,E.; MEDRI,M.E.; COLLI,S.; ALVES,L.M.T.. |
| Visando elucidar alguns aspectos do metabolismo respiratório de raízes inundadas de espécies arbóreas tropicais tolerantes (L. muehlbergianus, S.commersoniana e S. virgata) e intolerantes (P. dubium e S. terebinthifolius), plantas foram submetidas a 2, 10 e 60 dias de alagamento. Após estes períodos, determinou-se a absorção de O2 e liberação de CO2 pelas raízes. O metabolismo respiratório das raízes de espécies tolerantes apresentou uma queda com o alagamento. Somente S. commersoniana apresentou uma recuperação da respiração após 60 dias de inundação. A espécie intolerante S. terebinthifolius não teve seu metabolismo aeróbico afetado pelo alagamento, enquanto que P. dubium, também intolerante, apresentou queda na absorção de O2 com dois dias de hipoxia e... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Respiration; Flood tolerance; Tropical trees. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84041998000200007 |
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| Mielke,Marcelo S.; Matos,Elyabe M.; Couto,Virginia B.; Almeida,Alex-Alan F. de; Gomes,Fábio P.; Mangabeira,Pedro Antonio Oliveira. |
| An experiment was conducted with the aim to analyze the effects of soil flooding and leaf position on net primary productivity and whole plant carbon balance of Annona glabra L. (Annonaceae) seedlings, a highly flood-tolerant tree, native to the tropical Americas. All seedlings survived a period of 56 days of flooding without symptoms of stress. Flooding induced significant increments in root, stem and whole-plant biomass (P <0.01), and in the root:shoot mass ratio (P <0.05). Measurements of leaf gas exchange were conducted at days four, 11, 18 and 56 after flooding, on the first (L1), fourth (L4) and seventh (L7) fully expanded leaves from the apex of each seedling. The mean values of stomatal conductance to water vapour (g s) and net photosynthetic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annonaceae; Stomatal conductance; Brazilian Atlantic rainforest; Net photosynthetic rate; Flood tolerance. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062005000400025 |
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