Osmoregulators in Hymenaea courbaril and Hymenaea stigonocarpa under water stress and rehydration
- 150 Downloads
The objective of this work was to evaluate the effect of different water deficiency and rehydration levels on the concentrations of osmoregulators in two plant species (Hymenaea courbaril and H. Stigonocarpa) in the Amazon. We adopted a 2 × 5 × 5 factorial system, referring to 2 species (H. courbaril and H. stigonocarpa) and 5 stages of hydration and rehydration. The five hydration and rehydration stages were established in: (1) Control treatment E0; (2) Plants with 13 days of stress after incubation—E13; (3) Plants with 26 days of stress E26; (4) The plants that were established after 26 days after incubation and rehydrated for two days (RD2); (5) rehydrated for two days (RD4). The plants that were established after 26 days after incubation and rehydrated for four days. The experiment totaled fifty young plants with five replicates. Biochemical measurements were performed at the beginning of the experiment (E0) at 13 (E13) and 26 (E26) days after the water stress, in which the plants were rehydrated, repeating the analyses after two (RD2) and four (RD4) days. Both species increased the sucrose concentration by 18%, with a decrease of 52% in starch content. The RD4 time presented the highest mean starch concentration (0.19 mmol g−1 of the residue for H. courbaril and 0.27 mmol g−1 of residue for H. stigonocarpa). Increased proline concentrations were recorded for controls until RD2 for both species. For glycine betaine, the highest increases in treatments E26 and RD2 were observed for the H. courbaril species. Our rehydration period was not sufficient for total recovery of pre-stress concentrations of all studied solutes.
KeywordsAmazonia Water stress Osmotic adjustment Proline Sucrose
The authors are grateful to the Universidade Federal Rural da Amazônia for the financial support of this work and the collaborations of researchers.
- Barbosa LM, Martins SE (2003) Diversificando o reflorestamento no estado de São Paulo: espécies disponíveis por região e ecossistema. Instituto de Botânica, São Paulo, p 63Google Scholar
- Brito AEA, Palheta JG, Costa AS, Sousa JCM, Nascimento VR, Machado LC, Martins JTS, Costa TC, Nogueira GA, Andrade Júnior WV, Filho BGS, Costa TC (2016) Growth and ecophysiological aspects in young plants of (Hymenaea courbaril L.) submitted to water stress and flooding. Int J Curr Res 8(7):34647–34654Google Scholar
- Kavi kishor PB, Sangam S, Amrutha RN, Sri laxmi P, Naidu KR, Rao KRSS, Rao S, Reddy KJ, Theriappan P, Sreeniv N (2005) Regulation of proline biosynthesis, degradation, uptake and transport in higher plants: its implications in plant growth and abiotic stress tolerance. Curr Sci 88(3):424–438Google Scholar
- Larcher W (2006) Ecofisiologia Vegetal. Tradução: Prado CHBA. São Carlos: RimaGoogle Scholar
- Nascimento HHC (2009) Caracterização ecofisiologica de mudas de Jatobá (Hymenaea courbaril L.) submetidas a déficit hídrico. Dissertação (Mestrado)—Universidade Federal Rural de PernambucoGoogle Scholar
- Paiva HN, Vital BR (2003) Escolha da espécie florestal. Universidade Federal de Viçosa, Viçosa. (Cadernos Didáticos, 93)Google Scholar
- Pimentel C (2004) A Relação da Planta com a Água. Seropédica, Rio de Janeiro, p 191Google Scholar
- Santos Filho BG, Neto CFO, Alves GAR, Lobato AKS, Costa RCL. 2010. Potencial hídrico e ajustamento osmótico em plantas jovens de jatobá (Hymenaea courbaril L.) oriundas de sementes da base petrolífera geólogo ‘Pedro de Moura’ em Urucu, município de Coari, AM submetidas à deficiência hídrica e alagamento. III Reunião Científica da Rede CTPetro Amazônia—Manaus. http://projetos.inpa.gov.br/ctpetro/IIIReuniao/ArtigosReuniao/PT1/Resumos/PT1%2002.pdf. Accessed 10 Jan 2017
- SAS Institute (1987) SAS—statistical analysis system: system for elementary statistical analysis. SAS Institute, Cary, p 416Google Scholar