Physio-biochemical characterization of two acacia species (A. karroo Hayn and A. saligna Labill.) under saline conditions

Kheloufi, Abdenour; Mansouri, Lahouaria Mounia; Anas, Mami; Djelilate, Mohamed

doi:10.21750/refor.7.04.66

Cited by 4 publications

(3 citation statements)

References 62 publications

(67 reference statements)

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“…It should be noted that for each measurement or assay, a number of 4 replications were used. In addition, and to ensure the study of the effect of salinity on all parameters with the same conditions of growth and development, a considerable number of plants were used (4 plants × 4 treatments × 2 species) (Kheloufi et al, 2019).…”

Section: Materials and Methods Plant Material Growth Condition And Samentioning

confidence: 99%

Anatomical Changes Induced by Salinity Stress in Root and Stem of Two Acacia Species (A. Karroo and A. Saligna)

Kheloufi¹,

Mansouri²

2019

AgricultForest

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Soil salinity is one of the main abiotic constraints limiting plant growth. This paper focuses on the concept of internal adaptation in relation to salt tolerance during the vegetative phase. Under saline conditions, we evaluated some anatomical changes in stems (area, perimeter, cortex thickness, stele area, stele perimeter, pith area) and roots (thickness, cortex thickness and stele thickness) of two acacia species (A. karroo and A. saligna). Plants of 90 days old were cultured at various concentrations of NaCl (0, 200, 400 and 600 mM) for 21 days. The experiment was laid out in completely randomized design with four replications. For microscopic analysis, the stem tissues were cross-sectioned and the root were profile viewing. Results showed that salt caused remarkable changes in some anatomical-related parameters. Microscopic studies showed that every acacia species had made its own anatomical changes in stem and root by increasing/decreasing organ area, such as cortex thickness, stele thickness and pith area compared to control. In conclusion, under saline regimes, both species adapted specific characteristics of the roots and stems for better survival under saline environments.

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Section: Materials and Methods Plant Material Growth Condition And Samentioning

confidence: 99%

Anatomical Changes Induced by Salinity Stress in Root and Stem of Two Acacia Species (A. Karroo and A. Saligna)

Kheloufi¹,

Mansouri²

2019

AgricultForest

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“…A. cyanophylla is used almost everywhere for reforestation, ornamentation, production of soil tannins and coastal dune fixation (Marzialetti et al, 2019). Its tolerance to cold, drought, salinity and fires has enabled it to be classified among the most forest species used in the reforestation of arid and semi-arid zones (Derkaoui et al, 2016;Kheloufi et al, 2019). In addition, this hardy competitive legume species is nodulating with a vast number of Rhizobium strains, fixing atmospheric nitrogen (Amrani et al, 2010;Pathak et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of Dual Symbiotic Interactions Performed by the Exotic Tree Golden Wreath Wattle (Acacia cyanophylla Lindl.) on Soil Fertility in a Costal Sand Dune Ecosystem

Dounas

Bourhia²,

Outamamat³

et al. 2022

Front. Environ. Sci.

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The present study aims to evaluate the effects of the exotic shrub Acacia cyanophylla Lindl. on soil fertility by studying 1) its ability to modify the soil physicochemical composition, 2) its contribution to the soil mycorrhizal potential and its impact on the richness and diversity of the arbuscular mycorrhizal fungi (AMF) community in the rhizospheric soil (RS), and finally 3) its atmospheric nitrogen fixation potential. The physicochemical analysis of the RS has shown that soil invasion by A. cyanophylla has a beneficial effect on its fertility; this advantage is demonstrated by the increase of the organic matter and the nutrient contents (N, P, K, Na, Ca) in the RS. Furthermore, the roots of this shrub exhibited broad AMF colonization, which confirms its high mycotrophic aspect. Four differentiated morphotypes of mycorrhizal spores were isolated from the RS of A. cyanophylla by use of the wet sieving method. In addition, the most probable number method showed that A. cyanophylla was capable of dramatically increasing the mycorrhizal potential of the soil. Indeed, more than 1,213 infectious propagules per one hundred grams of soil were detected in the RS of A. cyanophylla. Moreover, A. cyanophylla roots showed a significant presence of nodules indicating an active atmospheric nitrogen fixation. Counting revealed the presence of at least 130 nodules in the root fragments contained in 1 kg of soil. In conclusion, the biological invasion of sand dunes by the exotic shrub A. cyanophylla exhibited beneficial effects on the soil’s chemical composition and functioning, the activity of rhizobacteria in fixing atmospheric nitrogen, and phosphate bioavailability under the action of the native AMF community.

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“…The degree of salinity response depends on the salt concentration, the species itself, its variety and the stage of the plant's development (van Zelm et al 2020). However, plant tolerance to salinity is not a fixed trait, and often varies with plant growth (Kheloufi et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Effect of temperature and salinity on germination and seedling establishment of Ailanthus altissima (Mill.) Swingle (Simaroubaceae)

Kheloufi

Mansouri

Zerrouni

et al. 2020

REFOR

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The tree of heaven Ailanthus altissima (Mill.) Swingle is a multipurpose tree in forestry. However, it is considered an invasive and dangerous plant for native species, and in particular for national parks, where many studies have recorded their involvement in the disturbance of the already developed floral diversity. Assessing the impact of certain abiotic conditions on this species may identify the expected areas to be colonized by its seed propagation. Germination of tree of heaven were tested for germination at constant temperatures of 25, 30, 40°C, and at room temperature varying from 25-30°C coupled with total darkness. Seeds were sown in Petri dishes (0.8% agar water) for 6 days of incubation. The kinetic of germination was determined according to five closely related parameters viz. final germination percentage (FGP), mean germination time (MGT), coefficient of velocity of germination (CVG), time to 50% germination (T50) and seedling length (SL). For the saline condition, the seeds underwent various NaCl concentrations from 0, 50, 100 or 200 mM. For each treatment, there were four replicates with 50 seeds incubated in a plastic container between two layers of moist sand at 15% of the appropriate treatment and then placed in a culture chamber at 27°C (± 2°C) for 30-day period. The effect of temperature was not significant on the MGT, CVG and T50. However, it was significant (p< 0.0001) on FGP and SL. The maximum germination of 94% was obtained at a temperature of 30°C and the lowest FGP of 40% was obtained at 25°C. For the salinity effect, the FGP of 75% in the control was much higher compared to the seeds treated at 50 mM NaCl with only 17.2% of FGP. Germination was completely inhibited from 100 mM NaCl. A. altissima can be classified as sensitive to salt stress during seed germination and seedling emergence. The salinity effect then joined the temperature to monitor nature's A. altissima seed propagation.

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Physio-biochemical characterization of two acacia species (A. karroo Hayn and A. saligna Labill.) under saline conditions

Cited by 4 publications

References 62 publications

Anatomical Changes Induced by Salinity Stress in Root and Stem of Two Acacia Species (A. Karroo and A. Saligna)

Anatomical Changes Induced by Salinity Stress in Root and Stem of Two Acacia Species (A. Karroo and A. Saligna)

Effects of Dual Symbiotic Interactions Performed by the Exotic Tree Golden Wreath Wattle (Acacia cyanophylla Lindl.) on Soil Fertility in a Costal Sand Dune Ecosystem

Effect of temperature and salinity on germination and seedling establishment of Ailanthus altissima (Mill.) Swingle (Simaroubaceae)

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