Revista Chapingo Serie Ciencias Forestales y del Ambiente
Universidad Autónoma Chapingo
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Revista Chapingo Serie Ciencias Forestales y del Ambiente
Volume XXV, issue 1, January - April 2019
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Régimen hídrico e intercambio de gases de Prosopis laevigata (Humb. &Bonpl. ex Willd.) M. C. Johnst. en dos ecosistemas semiáridos del sur de Sonora
Water regime and gas exchange of Prosopis laevigata (Humb. & Bonpl. exWilld.) M. C. Johnst. in two semi-arid ecosystems in southern Sonora

Elvia N. Rodríguez-Sauceda; Leandris Argentel-Martínez; Denisse Morales-Coronado

http://dx.doi.org/10.5154/r.rchscfa.2018.09.068

Received: 2018-09-02

Accepted: 2018-11-13

Available online: 2018-11-16 / pages.107-121

 

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  • descriptionAbstract

    Introduction:  Among   the   adverse   conditions   of   forest   ecosystems,   salinity   anddrought   are   the   abiotic   factors   that   largely   modify   the   genetic   and   productiveexpression of species.
    Objective: To evaluate the effect of salinity and drought on the water regime and gasexchange of mesquite (Prosopis laevigata [Humb. & Bonpl. ex Willd.] M. C. Johnst.)in two  semi-arid   sites,   Eco   Camping  and  Bahía   de   Lobos,  in  southern   Sonora,Mexico.
    Materials and methods: The water and osmotic potentials were determined in theroot, stem and leaves of plants taken at random with similar morphological traits(height of 1.5 m  and stem diameter of 0.15 m measured at 1.3 m). In addition,photosynthesis, transpiration and water-use efficiency were evaluated.
    Results and discussion: Water and osmotic potentials decreased significantly (P =0.0043); the osmotic potential was the lowest in the three organs measured, forminga potential gradient, an aspect that explains the maintenance of transpiration in bothconditions   (salinity   and   drought).   Photosynthesis   did   not   vary   significantly,   buttranspiration   did.   In   both   sites,   water-use   efficiency   exceeded   6  μmol   CO2/H2O;however, there was greater efficiency in the saline ecosystem due to the transpirationdecrease.
    Conclusion:  Mesquite has the ability to tolerate the stressful conditions of salinityand drought in southern Sonora, showing less impact in water relations and gasexchange in the salinity condition.

    Keyworks: water potential; osmotic potential; water-use efficiency; salinity; drought
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  • starCite article

    Rodríguez-Sauceda, E. N.,  Argentel-Martínez, L., &  Morales-Coronado, D. (2019).  Water regime and gas exchange of Prosopis laevigata (Humb. & Bonpl. exWilld.) M. C. Johnst. in two semi-arid ecosystems in southern Sonora. Revista Chapingo Serie Ciencias Forestales y del Ambiente, XXV(1), 107-121. http://dx.doi.org/10.5154/r.rchscfa.2018.09.068