Pablo A. Meglioli, Juan A. Alvarez, Nerina B. Lana, Mariano A. Cony, Pablo E. Villagra
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引用次数: 0
Abstract
Afforestation with native trees can enhance the conversion of degraded saline lands into productive landscapes with considerable economic and environmental benefits. To identify the native salt‐resistant species for restoration, we investigated how salinity affects the growth and water status of sapling from two Neltuma species from the Monte region. We produced Neltuma flexuosa and Neltuma chilensis saplings using seeds harvested from native forests with multiple provenances (Fiambalá, Chilecito, Mogna, Pipanaco, Talampaya, and Andalgalá). We conducted a greenhouse trial in which 810 saplings of different species/provenance combination received one of three saline irrigations, that is, sodium chloride solutions of 0.01 (no stress), 0.10 (moderate stress), and 0.25 M (severe stress). We found that Neltuma saplings exhibited varying degrees of reduction in their growth (plant height and aboveground biomass) and water status (e.g., stomatal conductance and leaf water potential) traits with increasing salt stress. N. flexuosa‐Fiambalá and N. flexuosa‐Chilecito were the most tolerant and sensitive, respectively, while all provenances of N. chilensis showed intermediate tolerance to salinity. These results suggest that N. flexuosa displays highly variable plasticity to salt stress compared to N. chilensis, emphasizing the need to select appropriate provenances for afforestation in saline‐degraded areas.
期刊介绍:
Restoration Ecology fosters the exchange of ideas among the many disciplines involved with ecological restoration. Addressing global concerns and communicating them to the international research community and restoration practitioners, the journal is at the forefront of a vital new direction in science, ecology, and policy. Original papers describe experimental, observational, and theoretical studies on terrestrial, marine, and freshwater systems, and are considered without taxonomic bias. Contributions span the natural sciences, including ecological and biological aspects, as well as the restoration of soil, air and water when set in an ecological context; and the social sciences, including cultural, philosophical, political, educational, economic and historical aspects. Edited by a distinguished panel, the journal continues to be a major conduit for researchers to publish their findings in the fight to not only halt ecological damage, but also to ultimately reverse it.