The Application of leaf ultrasonic resonance to vitis vinifera L. suggests the existence of a diurnal osmotic adjustment subjected to photosynthesis
Sancho-Knapik, Domingo (Centro de Investigación y Tecnología Agroalimentaria de Aragón. Unidad de Recursos Forestales)
Medrano, Hipólito (Universitat de les Illes Balears. Departament de Biologia)
Peguero Pina, José J. (Centro de Investigación y Tecnología Agroalimentaria de Aragón. Unidad de Recursos Forestales)
Mencuccini, Maurizio (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Fariñas, M. D. (Instituto de Tecnologías Físicas y de la Información. Departamento de Sensores y Sistemas Ultrasónicos)
Álvarez-Arenas, Tomás G. (Instituto de Tecnologías Físicas y de la Información. Departamento de Sensores y Sistemas Ultrasónicos)
Gil-Pelegrín, Eustaquio (Centro de Investigación y Tecnología Agroalimentaria de Aragón. Unidad de Recursos Forestales)

Date:	2016
Abstract:	The main objective of this study was to apply the air-coupled broad-band ultrasonic spectroscopy in attached transpiring leaves of Vitis vinifera L. to monitor changes in leaf water potential (9) through the measurements of the standardized value of the resonant frequency associated with the maximum transmitance (f/fo). With this purpose, the response of grapevine to a drought stress period was investigated in terms of leaf water status, ultrasounds, gas exchange and sugar accumulation. Two strong correlations were obtained between f/fo and 9 measured at predawn (pd) and at midday (md) with different slopes. This fact implied the existence of two values of 9 for a given value of f/fo, which was taken as a sign that the ultrasonic technique was not directly related to the overall 9, but only to one of its components: the turgor pressure (P). The difference in 9 at constant f/fo (d) was found to be dependent on net CO2 assimilation (A) and might be used as a rough estimator of photosynthetic activity. It was then, the other main component of 9, osmotic potential (p), the one that may have lowered the values of md 9 with respect to pd 9 by the accumulation of sugars associated to net CO2 assimilation. This phenomenon suggests the existence of a diurnal osmotic adjustment in this species associated to sugars production in well-watered plants.
Grants:	Ministerio de Economía y Competitividad IPT-2012-1022-310000
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Diurnal osmotic adjustment ; Drought ; Gas exchange ; Leaf ultrasonic frequency ; Vitis vinifera ; Water potential
Published in:	Frontiers in plant science, Vol. 7 (Oct. 2016) , art. 1601, ISSN 1664-462X

PMID: 27833626

11 p, 2.6 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
Articles > Published articles