Salt tolerance of native trees relevant to the restoration of degraded landscapes in the Monte region, Argentina

IF 2.8 3区环境科学与生态学 Q2 ECOLOGY

Restoration Ecology Pub Date : 2024-09-17 DOI:10.1111/rec.14246

Pablo A. Meglioli, Juan A. Alvarez, Nerina B. Lana, Mariano A. Cony, Pablo E. Villagra

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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.

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与恢复阿根廷蒙特地区退化景观相关的本地树木的耐盐性

利用本地树种植树造林可促进将退化的盐碱地转化为具有可观经济和环境效益的生产性景观。为了确定用于恢复的本地抗盐树种，我们研究了盐度如何影响蒙特地区两种 Neltuma 树种树苗的生长和水分状况。我们使用从多个产地（Fiambalá、Chilecito、Mogna、Pipanaco、Talampaya 和 Andalgalá）的原生林中采集的种子培育了 Neltuma flexuosa 和 Neltuma chilensis 树苗。我们在温室中进行了一项试验，810 株不同品种/产地组合的树苗接受了三种盐水灌溉中的一种，即 0.01 毫升（无压力）、0.10 毫升（中等压力）和 0.25 毫升（严重压力）的氯化钠溶液。我们发现，随着盐胁迫程度的增加，Neltuma 树苗的生长（株高和地上生物量）和水分状况（如气孔导度和叶片水势）性状都有不同程度的下降。N.flexuosa-Fiambalá和N.flexuosa-Chilecito对盐分的耐受性和敏感性分别最强，而N.chilensis的所有产地对盐分的耐受性处于中等水平。这些结果表明，与 N. chilensis 相比，N. flexuosa 对盐胁迫的可塑性差异很大，这强调了在盐碱退化地区植树造林时选择适当产地的必要性。

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来源期刊

Restoration Ecology 环境科学-生态学

CiteScore

6.50

自引率

15.60%

发文量

226

审稿时长

12-24 weeks

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.