Agro-physiological responses of Moroccan alfalfa (Medicago sativa L.) populations to salt stress during germination and early seedling stages

Farissi, Mohamed; Bouizgaren, Abdelaziz; Faghire, Mustapha; Bargaz, Adnane; Ghoulam, Cherki

doi:10.15258/sst.2011.39.2.11

Cited by 53 publications

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“…The pH was adjusted to the values of 5.6-5.8 prior to autoclaving. Many researchers have argued that NaCl affects alfalfa plants at early stages of the life-cycle, and the obtained different responses have been used to screen for salt tolerance [52][53][54][55][56][57][58][59]. Similarly in this study the sterile seedlings were maintained on a selective medium for 10 weeks.…”

Section: Salt Treatmentsmentioning

confidence: 99%

“…icon as the most salt tolerant among the alfalfa varieties tested (Table 6). The reduction of alfalfa growth following NaCl addition has been widely argued in the literature [55,59,69,71,72]. Studies performed on other species, under saline conditions, show that the growth inhibition is due to a nutrient uptake alteration [33,73,74] or to a toxic Na and Cl intracellular concentration occurring in the stressed plants [75].…”

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confidence: 98%

“…This allows us to infer information about saline tolerance of M. sativa varieties after only ten weeks of saline treatments on the seedlings. In this way, it is possible to select at early stages of the life-cycle those individuals which will remain tolerant even in later stages [59,69,70].…”

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confidence: 99%

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Alfalfa (Medicago sativa L.) clones tolerant to salt stress: in vitro selection

et al. 2013

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In order to quickly and efficiently evaluate the salt tolerance of alfalfa, salinity tests were conducted on Medicago sativa L. var. australis, var. icon, var. loi, and var. gea, under in vitro conditions. Pregerminated seeds of four varieties were subjected to five different NaCl concentrations (0, 50, 100, 150, 200 mM). The influence of saline stress was estimated on the basis of survival percentage, growth parameters, and electrolyte leakage. The seedlings surviving on the medium enriched with salt at the highest concentration were presumed to be tolerant and represented the mother plants for the production of in vitro clones. In the following step, the clones were evaluated in vitro to confirm the salt tolerance. The influence of mild salt stress (75 mM NaCl) on the growth parameters of selected clones was examined. At the end of this trial, the proline accumulation and sodium content in alfalfa shoots were also quantified. The results suggest an increased level of proline promotes salt tolerance. Medicago sativa L. var. icon is highly tolerant in comparison with the other varieties tested. In vitro selection of M. sativa L. varieties on salt-containing media allowed us to obtain clones with increased salinity tolerance.

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Section: Salt Treatmentsmentioning

confidence: 99%

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confidence: 98%

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Alfalfa (Medicago sativa L.) clones tolerant to salt stress: in vitro selection

et al. 2013

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“…Thus, in Ref. [34], salt stress resulted in signiicant K + reductions and Na + accumulations in young seedlings of M. sativa L. The direct and indirect efects of water deicit on the assimilation of nutrients by roots [21].…”

Section: Efect On Growth and Nutrient Uptakementioning

confidence: 96%

Alfalfa and Its Symbiosis Responses to Osmotic Stress

Mouradi¹,

Farissi²,

Bouizgaren³

et al. 2018

New Perspectives in Forage Crops

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Alfalfa (Medicago sativa L.) is one of the most cultivated forage legumes in Morocco thanks to its great adaptation to the climatic conditions of this country, its high protein content and its ability to ix atmospheric nitrogen in symbiosis with rhizobia. Environmental stresses such as drought and salinity constitute a major factor limiting the symbiotic nitrogen ixation and legume productivity. In the last decades, this process has interested scholars in understanding the implication of these strains in legume stress tolerance in order to make these symbioses more eicient under diicult conditions. Seed osmopriming is a great technique in the amelioration of seed germination and seedlings growth in responses to several abiotic stress conditions. In this chapter, the efects of water deicit on the Moroccan alfalfa populations and their symbiotic association with rhizobia were discussed. Besides, osmopriming could make these symbioses more eicient especially under stress conditions.

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“…To resist the drought, the plant recourse to changes has morphologic, physiologic and biochemical properties (Xiong et al 2006). These changes include water efficiency, osmotic adjustment, photosynthetic activity and accumulation of proline (Dhanda et al 2004;Kalefetoglu and Ekmekçi 2009;Farissi et al 2011). The drought conditions, reduces yield and produced biomass of the chickpea (Leport et al 2006) and decreased the relative water content (Chandrasekar et al 2000).…”

Section: Introductionmentioning

confidence: 99%

Effect of drought on growth, physiological and biochemicalprocesses of chickpea-rhizobia symbiosis

Khadraji¹,

Ghoulam²

2016

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The effects of drought on growth, several physiological and biochemical processes in six winter varieties (Zhour, Rizki, Douyet, V46, V34 and P37) of chickpea (Cicer arietinum L.) and two rhizobial strains (MC07 and MC10) were studied. The experiment was conducted under greenhouse conditions. Seedlings were grown under three regimes moistening and inoculated separately: 100 % of field capacity (control), 80% of field capacity (optimal irrigation) and 40% of field capacity (water deficit). The results showed that the hydric deficit had significantly perturbed the dry biomass, proline activity, total chlorophyll and nitrogen contents. Moreover, this constraint negatively affected the water deficit saturation (WDS), the membrane permeability and the stomatal conductance of leaves. Under drought, the varieties Zhour and Rizki showed a better water efficiency that was translated by high level in proline accumulation, membrane stability, total chlorophyll and nitrogen contents. These parameters were maintained at the adequate levels with the rhizobial strain MC07 which showed a tolerance in the drought condition. On the contrary, the symbiotic combination least powerful according to the studied parameters is formed by the variety P37-MC10.

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Agro-physiological responses of Moroccan alfalfa (Medicago sativa L.) populations to salt stress during germination and early seedling stages

Cited by 53 publications

References 0 publications

Alfalfa (Medicago sativa L.) clones tolerant to salt stress: in vitro selection

Alfalfa (Medicago sativa L.) clones tolerant to salt stress: in vitro selection

Alfalfa and Its Symbiosis Responses to Osmotic Stress

Effect of drought on growth, physiological and biochemicalprocesses of chickpea-rhizobia symbiosis

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