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Revista Chapingo serie ciencias forestales y del ambiente

versión On-line ISSN 2007-4018versión impresa ISSN 2007-3828

Resumen

ESCOTO-HERNANDEZ, María G. et al. Acclimation responses of two tree species of the Tamaulipan Thornscrub under heterogeneous light environments. Rev. Chapingo ser. cienc. for. ambient [online]. 2024, vol.30, n.1, rrchscfa202301004.  Epub 03-Dic-2024. ISSN 2007-4018.  https://doi.org/10.5154/r.rchscfa.2023.01.004.

Introduction:

Ecophysiology and plant responses to environmental factors, such as acclimation to heterogeneous light environments, are important in ecosystems facing degradation and fragmentation processes such as the Tamaulipan Thornscrub (TT).

Objective:

The aim of this study is to evaluate the changes of some morphological and physiological attributes in plants of two representative species of the TT (Prosopis laevigata Humb. et Bonpl. ex Willd and Cordia boissieri A. DC.) grown under different light environments under nursery conditions.

Materials and methods:

Growth, biomass production and chlorophyll concentration were evaluated as responses to three environments: 1) outdoors (OD), 2) 40 % shade (N40) and 3) 60 % shade (N60). Plants were grown in a traditional polyethylene bag system for 17 weeks.

Results and discussion:

Based on diameter growth and biomass production, both species grew better in the outdoor light conditions. The effect of limited light availability was also observed in leaf area and chlorophyll a and b concentrations; these variables increased significantly (P < 0.05) for C. boissieri as shading increased, in contrast to P. laevigata.

Conclusion:

Although the growth of both species is higher in high light levels, C. boissieri shows acclimation strategies suggesting an intermediate tolerance to shade, compared to P. laevigata, which confirms to be light demanding. This information is important for the management of the species according to light conditions in reforestation programs.

Palabras llave : Prosopis laevigata; Cordia boissieri; shade tolerance; forest nursery; reforestation.

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