Towards an integration of plant ecophysiological traits for the conservation of endangered species in ecosystems under water stress

Carevic, Felipe S.

doi:10.4067/s0718-34292016000300005

Cited by 4 publications

(4 citation statements)

References 22 publications

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“…In this regard, ecological and genetical aspects of the conservation of rare and endangered plant species have mostly been considered [ 1 ]. However, there is a growing awareness that knowledge of the ecophysiology of these species is critically important for their conservation, especially in the context of global climate change [ 2 , 3 ]. This has been reflected in part by an increasing number of publications in the field as well as appeals for the need for mutualistic interactions between ecophysiology and different ‘omics’ technologies [ 4 ].…”

Section: Introductionmentioning

confidence: 99%

Ecophysiology of Endangered Plant Species Saussurea esthonica: Effect of Mineral Nutrient Availability and Soil Moisture

Gailīte

Andersone-Ozola

Samsone

et al. 2023

Plants

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Saussurea esthonica is an endangered plant species typical for wet inland habitats such as calcareous fens. Due to its limited population size and distribution, non-invasive sampling of is important in the research of S. esthonica. The aim of the present study was to assess the effect of mineral nutrient availability and substrate moisture on the growth, physiological status, and mineral nutrition of S. esthonica. The non-destructive measurement of physiological parameters was performed in native habitats during three vegetative seasons, followed by two experiments in controlled conditions. Soil at the two Estonian sites had a relatively larger similarity in the composition of plant-available mineral nutrients in comparison to the two Latvian sites. The chlorophyll a fluorescence parameter Performance Index correlated with the total precipitation in the respective month before measurement, but no significant relationship with other environmental variables was found. For mineral nutrient experiments, plants were grown in four substrates with different mineral nutrient composition, resembling that of soil at different S. esthonica sites. Plant growth and physiological indices were significantly affected by the mineral composition of the substrate. Differences in leaf and root mineral nutrient concentrations of S. esthonica plants in part reflected differences in substrate mineral concentration. To evaluate the effect of soil moisture on growth and photosynthesis-associated parameters of S. esthonica, plants were cultivated in “Pope+” substrate at four different moisture treatments (dry, normal, wet, and waterlodged). The most intense growth of S. esthonica plants was evident in waterlodged conditions, which decreased with a decrease in soil moisture. The biomass of leaves increased by 106% and that of the roots increased by 72% as soil moisture increased from dry to normal. For waterlodged plants, leaf biomass increased by 263% and root biomass increased by 566%, in comparison to that for plants cultivated in dry substrate. Substrate drying had a more negative effect on the growth of S. esthonica plants in comparison to that of waterlodging, and this can be directly linked to prevalent hydrological conditions of an alkaline fen habitat native to the species. Therefore, the preservation of the natural water regime in natural habitats is critical to the conservation of the species.

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Section: Introductionmentioning

confidence: 99%

Ecophysiology of Endangered Plant Species Saussurea esthonica: Effect of Mineral Nutrient Availability and Soil Moisture

Gailīte

Andersone-Ozola

Samsone

et al. 2023

Plants

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“…The Atacama Desert Andean Region stands out for the significant occurrence of exotic endemic species at risk of extinction, which are potential sources of nutraceuticals and functional ingredients [ 21 , 22 , 23 ]. In this sense, to conserve these rare and endangered plants, micropropagation or in vitro cultivation offers a biotechnological approach to control growth independent of seasonal and climatic variations.…”

Section: Resultsmentioning

confidence: 99%

Effect of In Vitro Micropropagation on the Chemical, Antioxidant, and Biological Characteristics of Senecio nutans Sch. Bip., an Endemic Plant of the Atacama Desert Andean Region

Parra,

Muñoz-Torres,

Escobar

et al. 2024

Plants

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The species Senecio nutans Sch. Bip., commonly called “chachacoma”, is widely used as a medicinal plant by the Andean communities of Northern Chile. Ethanolic extracts of S. nutans and the main compound, 4-hydroxy-3-(3-methyl-2-butenyl) acetophenone, have shown interesting biological activity. However, due to the high-altitude areas where this species is found, access to S. nutans is very limited. Due to the latter, in this work, we carried out micropropagation in vitro and ex vitro adaptation techniques as an alternative for the massive multiplication, conservation, and in vitro production of high-value metabolites from this plant. The micropropagation and ex vitro adaptation techniques were successfully employed, and UHPLC-DAD analysis revealed no significant changes in the phenolic profile, with acetophenone 4 being the most abundant metabolite, whose antioxidant and antibacterial activity was studied. Independently of the applied culture condition, the ethanolic extracts of S. nutans presented high activity against both Gram-positive and Gram-negative bacteria, demonstrating their antimicrobial capacity. This successful initiation of in vitro and ex vitro cultures provides a biotechnological approach for the conservation of S. nutans and ensures a reliable and consistent source of acetophenone 4 as a potential raw material for pharmacological applications.

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“…In CH site, only Ψ pd and Ψ md of A. chilensis showed more negative values compared to their p tlp in March 2016, whereas P. menziesii did not exceed its p tlp point (Figs 4 and 5). In the OTCs in MA, A. chilensis showed more negative values of Ψ pd for a longer time (January 2015, 2016and March 2016 than CP (Fig. 4).…”

Section: Midday Water Potential (ψ MD )mentioning

confidence: 92%

“…Nevertheless, few studies have focused on how climate change would act as a selection factor either favouring or limiting biological invasions during the recruitment stage. In this sense, considering that if the water supply is limited, higher temperature increases plant water stress, one way to analyse the response to warming is to measure the plant water potential of alien vs native species (Carevic 2016) in the early stages of development.…”

Section: Introductionmentioning

confidence: 99%

The vulnerability of native and invasive conifer seedlings to simulated warming in north‐western Patagonia

2021

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On the context that climate change could increase opportunities of colonisation and spreading for invasive species, we examined whether or not exotic species will respond better than native species to warming effect. We analysed its effect on the water potential (Ψ) of Austrocedrus chilensis and Pseudotsuga menziesii seedlings, native and exotic conifers, respectively. We hypothesise that the native species will show more negative Ψ values than the exotic seedlings in warming conditions. A field experiment was set up in two sites in A. chilensis forests in north‐western Patagonia. In each site, 14 blocks were installed, each consisting of an Open Top Chamber (OTC), which increases temperature by 2°C, and a control plot at current environmental temperature. In 7 blocks, 23 seedlings of P. menziesii were planted in each OTC and 23 in each control plot. In the remaining 7 blocks, A. chilensis seedlings were planted in the same way. Micro‐environmental variables and Ψpd and Ψmd were measured over two growing seasons (2014–2015 and 2015–2016); the turgor threshold of each species was also estimated. The data were analysed by MLGM with repeated measures. Our study showed that warming caused a decrease in air and soil humidity, resulting in a reduction in the water potential of both species at predawn and midday. The most negative water potential values were always recorded in the OTC conditions, and the significant differences between sites could be explained by different tree densities and water consumption. In all plots, A. chilensis Ψ values were found to be more negative than those of P. menziesii, but in the warming scenario, this difference was stronger. Moreover, although neither of the species was favoured by the OTC conditions, A. chilensis could be at higher risk than P. menziesii in the mesic site (MA) in a climate warming scenario.

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Towards an integration of plant ecophysiological traits for the conservation of endangered species in ecosystems under water stress

Cited by 4 publications

References 22 publications

Ecophysiology of Endangered Plant Species Saussurea esthonica: Effect of Mineral Nutrient Availability and Soil Moisture

Ecophysiology of Endangered Plant Species Saussurea esthonica: Effect of Mineral Nutrient Availability and Soil Moisture

Effect of In Vitro Micropropagation on the Chemical, Antioxidant, and Biological Characteristics of Senecio nutans Sch. Bip., an Endemic Plant of the Atacama Desert Andean Region

The vulnerability of native and invasive conifer seedlings to simulated warming in north‐western Patagonia

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