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Growth and Water Relations in Mycorrhizal and Nonmycorrhizal Pinus Halepensis Plants in Response to Drought

AuthorsMorte, Asunción; Díaz, Gisela; Rodríguez, Pedro; Alarcón Cabañero, Juan José ; Sánchez-Blanco, María Jesús
Dry mass
Ectomycorrhizal fungi
Fresh mass
Osmotic potential
Pressure potential
Stomatal conductance
Water potential
Issue DateJun-2001
CitationBiología Plantarum 44(2): 263-267(2001)
AbstractMycorrhizal and nonmycorrhizal Pinus halepensis plants were subjected to water stress by withholding irrigation for four months and then rehydrated for 30 d. Water stress affected plants growth and mycorrhizal association was unable to avoid the effects of drought on plant growth. However, when irrigation was re-established the increase in height, number of shoots, total dry mass, and chlorophyll content in the mycorrhizal plants were greater than in non-mycorrhizal plants. The decrease in soil water content decreased the leaf water potential, leaf pressure potential and stomatal conductance. These decreases were higher for nonmycorrhizal than for mycorrhizal plants, indicating that the mycorrhizal fungi permit a higher water uptake from the dry soils. The total content of inorganic solutes was not changed by presence of mycorrhizae.
Publisher version (URL)http://dx.doi.org/10.1023/A:1010207610974
Appears in Collections:(CEBAS) Artículos
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