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Plant water status indicators for detecting water stress in pomegranate trees

AuthorsGalindo Egea, A. CSIC ORCID; Rodríguez Hernández, Pedro; Ondoño, Sara CSIC; Collado González, Jacinta CSIC ORCID CVN; Moriana, Alfonso; Cruz, Z. N.; Moreno Lucas, Félix CSIC ORCID; Torrecillas Melendreras, Arturo CSIC ORCID
Issue Date12-May-2014
PublisherUniversidad Politécnica de Cartagena
CitationActas III Workshop en Investigación Agroalimentaria: -WiA3.14-. Cartagena: Universidad Politécnica de Cartagena, Servicio de Documentación, pag. 163-166 (2014)
AbstractMeasurements obtained by the continuous monitoring of trunk diameter fluctuations were compared with discrete measurements of midday stem water potential (PSIstem) and midday leaf conductance (gl) in adult pomegranate trees (Punica granatum (L.) cv. Mollar de Elche). Control plants (T0) were irrigated daily above their crop water requirements in order to attain non-limiting soil water conditions, while T1 plants were subjected to water stress by depriving them of irrigation water for 34 days, after which time irrigation was restored and plant recovery was studied for 7 days. T1 plants showed a substantial degree of water stress, which developed slowly. Maximum daily trunk shrinkage (MDS) was identified to be the most suitable plant-based indicator for irrigation scheduling in adult pomegranate trees, because its signal:noise ((T1/T0):coefficient of variation) ratio was higher than that for PSIstem ((T1/T0):coefficient of variation) and gl ((T0/T1):coefficient of variation). MDS increased in response to water stress, but when the PSIstem fell below ¿1.67 MPa, the MDS values decreased.
Description4 páginas.-- 2 figuras.-- 1 tabla.-- 12 referencias.-- Las Actas se encuentran en el Repositorio Institucional de la la Universidad Politénica de Cartagena con el hanled http://hdl.handle.net/10317/4152
Publisher version (URL)http://hdl.handle.net/10317/4152
Identifiersisbn: 978-84-697-1358-7
Appears in Collections:(CEBAS) Comunicaciones congresos
(IRNAS) Comunicaciones congresos
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