Water relations and organic solutes productions in four umbu tree (Spondias tuberosa) genotypes under intermittent drought.

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dc.contributorELIZAMAR C. SILVA; REJANE J. M. C. NOGUEIRA; FERNANDO H. A. VALE; NATONIEL FRANKLIN DE MELO, CPATSA; FRANCISCO PINHEIRO DE ARAUJO, CPATSA.
dc.creatorSILVA, E. C.
dc.creatorNOGUEIRA, R. J. M. C.
dc.creatorVALE, F. H. A.
dc.creatorMELO, N. F. de
dc.creatorARAUJO, F. P. de
dc.date2011-04-09T20:58:03Z
dc.date2011-04-09T20:58:03Z
dc.date2009-12-14
dc.date2009
dc.date2011-04-10T11:11:11Z
dc.date.accessioned2026-07-07T05:36:38Z
dc.descriptionIn order to evaluate changes in leaf water potential (?w) and solute accumulation induced by intermittent drought, a research was performed under greenhouse conditions using four umbu tree genotypes (GBU 44, GBU 48, GBU 50 and GBU 68) and two water treatments (control and stressed by withholding water), with four replicates. The ?w was measured in four-hour intervals during a 24-hour period at the first stomatal closure and at the end of the experimental period. Carbohydrates, amino acids, protein and proline contents were also evaluated in leaves and roots. Significant differences were found in most of the studied parameters. The lower ?w hour was between 800 h and 1200 h. GBU 50 reduced significantly ?w in stressed plants at 800 h, while control lants reduced at 1200 h . GBU 68 presented the higher ?w. The extending of the stress induced reductions to carbohydrates in the leaves of all genotypes, increases in amino acids to GBU 44 and 48, and reductions of 40% and 43% to GBU 50 and 68, respectively; results also showed alterations in proline content. In the roots, increases in carbohydrates were observed only in GBU 48. Alterations in amino acids, protein, and proline were verified. Umbu trees presented isohydric behavior maintaining high eaf water potential and a great variability in organic solutes accumulation in response to drought with marked differences among the genotypes.
dc.identifierBrazilian Journal of Plant Physiology, v. 21, n. 1, p. 43-53, 2009.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/577914
dc.identifier.urihttp://hdl.handle.net/123456789/496375
dc.languageeng
dc.rightsopenAccess
dc.subjectBioma Caatinga
dc.subjectUmbuzeiro
dc.subjectUmbu
dc.subjectGenótipo
dc.subjectSpondias Tuberosa
dc.subjectCarboidrato
dc.subjectPotencial Hídrico
dc.subjectProlina
dc.subjectWater potential
dc.subjectSpondias
dc.subjectCarbohydrates
dc.subjectProline
dc.titleWater relations and organic solutes productions in four umbu tree (Spondias tuberosa) genotypes under intermittent drought.
dc.typeArtigo de periódico

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