Water status and gas exchange of umbu plants (Spondias tuberosa Arr. Cam.) propagated by seeds and stem cuttings.

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dc.contributorJOSE MOACIR PINHEIRO LIMA FILHO, CPATSA.
dc.creatorLIMA FILHO, J. M. P.
dc.date2015-12-22T03:02:15Z
dc.date2015-12-22T03:02:15Z
dc.date2008-01-30
dc.date2007
dc.date2015-12-22T03:02:15Z
dc.date.accessioned2026-07-07T05:45:18Z
dc.descriptionThe experiment was carried out at the Embrapa Semi-Árido, Petrolina-PE, Brazil, in order to study the physiological responses of umbu plants propagated by seeds and by stem cuttings under water stress conditions, based on leaf water potential and gas exchange measurements. Data were collected in one-year plants established in pots containing 30 kg of a sandy soil and submitted to twenty-day progressive soil water deficit. The evaluations were based on leaf water potential and gas exchange data collection using psychrometric chambers and a portable infra-red gas analyzer, respectively. Plants propagated by seeds maintained a significantly higher water potential, stomatal conductance, transpiration and photosynthesis under decreasing soil water availability. However, plants propagated by stem cuttings were unable to maintain a favorable internal water balance, reflecting negatively on stomatal conductance and leaf gas exchange. This fact is probably because umbu plants propagated by stem cuttings are not prone to formation of root tubers which are reservoirs for water and solutes. Thus, the establishing of umbu plants propagated by stem cuttings must be avoided in areas subjected to soil water deficit.
dc.identifierRevista Brasileira de Fruticultura, v. 29, n. 2, p. 355-358, ago. 2007.
dc.identifierhttp://www.alice.cnptia.embrapa.br/alice/handle/doc/160533
dc.identifier.urihttp://hdl.handle.net/123456789/499258
dc.languagepor
dc.rightsopenAccess
dc.subjectTranspiração
dc.subjectTúbera
dc.subjectCondutância estomática
dc.subjectFotossíntese
dc.subjectPotencial Hídrico
dc.subjectUmbu
dc.subjectSpondias
dc.titleWater status and gas exchange of umbu plants (Spondias tuberosa Arr. Cam.) propagated by seeds and stem cuttings.
dc.typeArtigo de periódico

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