Leaf water relations in Diospyros kaki under mild water deficit

I. Griñán, P. Rodríguez, Hamideh Nouri, Eros Borsato, A. Molina, D. Morales, Z.N. Cruz, M. Corell, A. Centeno, A. Moriana, D. Pérez-López, A. Torrecillas, F. Hernández, Alejandro Galindo Egea

Research output: Contribution to conferenceAbstractAcademic

Abstract

The resistance mechanisms developed by persimmon (Diospyros kaki L. f.) plants in response to mild water stress and the sensitivity of continuously (on a whole-day basis) and discretely (at predawn and midday) measured indicators of the plant water status were investigated in 3-year old ‘Rojo Brillante’ persimmon plants. Control (T0) plants were drip irrigated in order to maintain soil water content at levels slightly above soil field capacity and T1 plants were drip irrigated for 33 days in order to maintain the soil water content at around 80 % of soil field capacity. The results indicated persimmon plants confront a mild water stress situation by gradually developing stomata control (stress avoidance mechanism) and exhibiting some xeromorphic characteristic such as high leaf relative apoplastic water content, which could contribute to the retention of water at low leaf water potentials. In addition, sap flow measurements made by the heat-pulse technique were seen to be the most suitable method for estimating persimmon water status, because it provided the highest signal intensity (actual value/reference value):noise (coefficient of variation) ratio in almost all intervals of time considered and provides continuous and automated registers of the persimmon water status in real time.

Original languageEnglish
Publication statusPublished - 2018
EventXIV Simposio Internacional Hispano-Portugués de Relaciones Hídricas en Las Plantas 2018 - Madrid, Spain
Duration: 3 Oct 20185 Oct 2018
Conference number: 14
http://blogs.upm.es/xivsimposiorhmadrid2018/

Conference

ConferenceXIV Simposio Internacional Hispano-Portugués de Relaciones Hídricas en Las Plantas 2018
CountrySpain
CityMadrid
Period3/10/185/10/18
Internet address

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