Articles
ROLE OF LIGNOTUBER VERSUS ROOTS IN THE WATER SUPPLY OF RAINFED OLIVES
Article number
991_22
Pages
181 – 188
Language
English
Abstract
Sap flow (SF) records for 2.5 years, in shallow and deep oriented roots as well as in lignotuber of rainfed olive trees, in a traditional Portuguese orchard, can demonstrate their relative role during dry and wet seasons.
Deep water reserves were found to be mobilized within the soil profile during the dry periods, namely at the end of very dry summer.
The role of the lignotuber, a storage organ for starch and nutrients supporting the demands for regrowth, was also evident as a water storage organ.
More relevant is the role of lignotubers in coping with dry periods due to their likely connection to sources of water in deeper layers in soil and/or subsoil, partially buffering the lack of soil water, at a time shallow roots had no access to it.
Deep water reserves were found to be mobilized within the soil profile during the dry periods, namely at the end of very dry summer.
The role of the lignotuber, a storage organ for starch and nutrients supporting the demands for regrowth, was also evident as a water storage organ.
More relevant is the role of lignotubers in coping with dry periods due to their likely connection to sources of water in deeper layers in soil and/or subsoil, partially buffering the lack of soil water, at a time shallow roots had no access to it.
Publication
Authors
M.-I. Ferreira, N. Conceição, T.S. David, N. Nadezhdina
Keywords
deep roots, shallow roots, heat field deformation method (HFD), water scarcity, sap flow
Online Articles (53)