Salicylic acid seed priming improves tolerance to salinity, iron deficiency and their combined effect in two ecotypes of Alfalfa

Boukari, Nadia; Jelali, Nahida; Renaud, Justin B.; Youssef, Rim Ben; Abdelly, Chédly; Hannoufa, Abdelali

doi:10.1016/j.envexpbot.2019.103820

Cited by 31 publications

(16 citation statements)

References 49 publications

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“…Salinity effect on chlorophyll content is often ambiguous. For instance, it has been recently demonstrated that salt stress increased photosynthetic pigments in both tolerant and sensitive alfalfa ecotypes [ 29 ]. This could also be the case for olive, which has not been previously reported and suggests that chlorophyll content alone do not to provide an indication of the extent of salt stress.…”

Section: Discussionmentioning

confidence: 99%

Response of Olive Shoots to Salinity Stress Suggests the Involvement of Sulfur Metabolism

Bashir

Silvestri

Coppa

et al. 2021

Plants

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Global warming has two dangerous global consequences for agriculture: drought, due to water scarcity, and salinization, due to the prolonged use of water containing high concentrations of salts. Since the global climate is projected to continue to change over this century and beyond, choosing salt-tolerant plants could represent a potential paramount last resort for exploiting the secondary saline soils. Olive is considered moderately resistant to soil salinity as compared to other fruit trees, and in the present study, we investigated the influence of NaCl solutions (ranging from 0 to 200 mM) in a salt-tolerant (cv Canino) and two of its transgenic lines (Canino AT17-1 and Canino AT17-2), overexpressing tobacco osmotin gene, and in a salt-sensitive (Sirole) olive cultivar. After four weeks, most of the shoots of both Canino and Sirole plants showed stunted growth and ultimate leaf drop by exposure to salt-enriched media, contrary to transgenic lines, that did not show injuries and exhibited a normal growth rate. Malondialdehyde (MDA) content was also measured as an indicator of the lipid peroxidation level. To evaluate the role of the S assimilatory pathway in alleviating the adverse effects of salt stress, thiols levels as well as extractable activities of ATP sulfurylase (ATPS) and O-acetyl serine(thiol)lyase (OASTL), the first and the last enzyme of the S assimilation pathway, respectively, have been estimated. The results have clearly depicted that both transgenic lines overexpressing osmotin gene coped with increasing levels of NaCl by the induction of S metabolism, and particularly increase in OASTL activity closely paralleled changes of NaCl concentration. Linear correlation between salt stress and OASTL activity provides evidence that the S assimilation pathway plays a key role in adaptive response of olive plants under salt stress conditions.

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Section: Discussionmentioning

confidence: 99%

Response of Olive Shoots to Salinity Stress Suggests the Involvement of Sulfur Metabolism

Bashir

Silvestri

Coppa

et al. 2021

Plants

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“…T. repens plants subjected to gibberellic acid and polyethylene glycol application based on this technique have shown lesser zinc accumulation after they were exposed to this metal (Galhaut et al 2014). Salicylic acid (SA) use in seed priming has mitigated salinity effects on alfalfa, which is an important forage legume (Boukari et al 2019). However, SA benefits to forage legumes should be investigated in the presence of Al, which is an abundant element highly capable of affecting the performance of these species (Moir et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Seed Priming with Salicylic Acid Minimizes Oxidative Effects of Aluminum on Trifolium Seedlings

Bortolin

Teixeira

Pinheiro

et al. 2020

J Soil Sci Plant Nutr

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Aluminum (Al) toxicity is one of the main aspects restricting the development of fabaceous plants grown in soils with spontaneous vegetation prevalence in temperate climate zones. Salicylic acid (SA) minimizes the effects of stress on plants. Therefore, the aim of the current study was to evaluate the ability of SA seed priming to mitigate the effects of Al on seed germination and seedling performance in two Trifolium species. Trifolium vesiculosum (annual) and Trifolium repens (perennial) seeds were primed in solution added, or not, with SA (25 μM) and placed on germination paper moistened with aluminum sulfate (Al 2 (SO 4) 3) solutions at three different doses: 0 mM (control), 0.25 mM (moderate dose), and 1.25 mM (high dose). Seed priming with SA has mitigated the global toxicity effects of Al on T. vesiculosum and T. repens seedlings. Inferior damages were observed in T. vesiculosum root length and dry mass and in T. repens shoot dry mass, after SA pretreatment. T. vesiculosum seed priming with SA in the presence of Al has significantly reduced the osmotic potential of seedling sap. Salicylic acid (SA) has also enabled increased antioxidant activity of enzymes such as superoxide dismutase (SOD) in the two investigated plant species and ascorbate peroxidase (APX) in T. repens. In addition to the increased antioxidant activity, SA-primed seeds reduced the malondialdehyde content in T. vesiculosum seedlings exposed to Al. Overall, seed priming with SA mitigates oxidative effects of Al and improves T. vesiculosum and T. repens seedling performance in the presence of this element.

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“…Salinity is considered one of the most serious stresses for alfalfa (Table 1). The main effects of salinity are ion toxicity (mainly sodium ions), hyperosmotic pressure (which results in low water availability) (Luo et al 2019), oxidative stress and nutrient deficiency (Boukari et al 2019). plants cultivated under salinity stress have certain defense mechanismstowards this stress in the form of a series of severe biochemical and physiological changes.Salinity stress may also disturb the regulation of plant hormones and photosynthesis processes causing an imbalance in plant nutritional status, reducing plant yield and quality (Farooq et al 2017).The main effects of soil salinity on alfalfa reproduction include negative impacts on germination and growth, competition for the uptake of mineral nutrients, the photosynthetic process, the efficiency of biological nitrogen fixation and yield quality (Farooq et al 2017).…”

Section: Germination Under Salinity Stressmentioning

confidence: 99%

“…(5) Balancing the uptake of nutrients like Na + and K + (Alsaeedi et al and reinstating the cellular ionic equilibrium, then reducing the ionic or osmotic damage that was caused by salinity stress (Luo et al 2019), (6) Maintaining the performance of photosynthetic CO 2 assimilation and sinks (penella et al 2016). preventing reduction in the photosynthetic attributes as well as alleviating stomatal parameters and chlorophyll fluorescence by adding H 2 S under salinity stress (Jiang et al 2019), (7) priming of alfala seeds in salicylic acid may improve the plant's tolerance to salinity stress and iron deficiency (Boukari et al 2019), (8) Due to water uptake inhibition and/or the specific toxic impact of ions in the embryo of legume seeds, seed germination may be reduced up to 50% or more under salt stress (Table 5) (Farooq et al 2017;Gao et al 2019b),…”

Section: Germination Under Salinity Stressmentioning

confidence: 99%

Alfalfa Growth under Changing Environments: An Overview

El-Ramady

Abdalla

Kovács

et al. 2020

EBSS

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C ROp production is one of the most important agro-global issues, in particular questions of production under changing environmental conditions. This production needs to be increased to meet global needs for food, feed, fiber and fuel. Alfalfa is classified as "the queen of the forage crops" due to its high protein content and nutritional valueas well as its unique availability during the summer compared with other forage crops. The production of alfalfa under different stressful environments is a great challenge due toseveral problems with alfalfa crop production, which represent a serious threat to global food security.These stresses may cause a decline in the global feed production from alfalfa due to harmful effects resulting from stressesat the physiological, biochemical and histological levels. To improve the production of alfalfa under these stresses, there is a crucial need to understand the response of alfalfa plants to stresses, the mechanisms of tolerance and the management options. The bio-organic fertilizers derived from alfalfa plants are a crucial and sustainable solution in particular under stressful environments. This review represents an attempt to highlight the positive sides of alfalfa production, particularly the sustainable use of this crop in bio-organic fertilizer production. The chemical and anatomical properties of this plant will also bereviewed. The histology of alfalfa plants under changing environments still needsfurther investigation.

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Salicylic acid seed priming improves tolerance to salinity, iron deficiency and their combined effect in two ecotypes of Alfalfa

Cited by 31 publications

References 49 publications

Response of Olive Shoots to Salinity Stress Suggests the Involvement of Sulfur Metabolism

Response of Olive Shoots to Salinity Stress Suggests the Involvement of Sulfur Metabolism

Seed Priming with Salicylic Acid Minimizes Oxidative Effects of Aluminum on Trifolium Seedlings

Alfalfa Growth under Changing Environments: An Overview

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