Infuence of soil characteristics on physiological and growth responses of Cytharexyllum myrianthum Cham. (Verbenaceae) to fooding
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| Autores: | , , , , , , , , |
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| Formato: | artículo |
| Fecha de Publicación: | 2020 |
| Descripción: | The success of watershed riparian forest restoration programs can be afected by the selection of plant species tolerant to fooding and soil types that occur along water courses. We evaluated physiological and growth responses of Cytharexyllum myrianthum seedlings to fooding in three diferent soil types representative of the Almada River Watershed (ARW), southern Bahia, Brazil. The soils selected, based on the relative abundance and importance in the ARW, were: Luvisol, Argisol, and Spodosol. After 35 days of fooding, the Argisol had the lowest and the Spodosol had the highest reduction–oxidation (redox) potential (Eh). After 35 days of fooding, the Luvisol had higher pH and electrical conductivity (Ec) than the other soils. Stomatal conductance (gs) and net photosynthesis (A) signifcantly declined in all soil types after 7 days of fooding. After that period, morphological changes characteristic of food-tolerant plants, such as lenticel hypertrophy and adventitious root formation, were observed in all fooded plants. Following the morphological changes, gs and A in fooded plants increased to values close to those of the non-fooded plants. The highest relative growth rates based on mass (RGRm) and net assimilation rates (NAR) for the non-fooded plants were observed in the Argisol. After 35 days of fooding, no signifcant diferences in RGRm or NAR were observed between non-fooded and fooded plants in the Luvisol, but large signifcant decreases in RGRm and NAR were observed for the fooded plants in the Spodosol. Our results demonstrated that the ability of seedlings of the same species to acclimate to fooded soil conditions difers among soil types. Therefore, the characteristics of soils present in a watershed should be considered when selecting tree species for the reforestation of riparian forests. |
| País: | Repositorio UNA |
| Institución: | Universidad Nacional de Costa Rica |
| Repositorio: | Repositorio UNA |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:null:11056/21152 |
| Acceso en línea: | http://hdl.handle.net/11056/21152 |
| Palabra clave: | BRAZILIAN ATLANTIC RAINFOREST NET PHOTOSYNTHESIS RIPARIAN FOREST RESTORATION SOIL REDOX POTENTIAL STOMATAL CONDUCTANCE ALMADA RIVER WATERSHED BOSQUES RESTAURACIÓN CUENCAS HIDROGRÁFICAS |