Effects of water deficit on growth, nodulation and physiological and biochemical processes in<i>Medicago sativa</i>-rhizobia symbiotic association

Mouradi, Mohammed; Farissi, Mohamed; Bouizgaren, Abdelaziz; Makoudi, Bouchra; Kabbadj, Ablaa; Véry, Anne‐Aliénor; Sentenac, Hervé; Qaddourya, Ahmed; Ghoulam, Cherki

doi:10.1080/15324982.2015.1073194

Cited by 45 publications

(37 citation statements)

References 39 publications

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“…The results of our study showed a signiicant increase of this parameter under water deicit in all the studied symbiotic combinations. However, this increase was not signiicant for the more tolerant combination Ad-RcRh09 which proves the importance of this parameter in the osmotic stress tolerance [24]. The same results have been reported in Refs.…”

Section: Efect On Alfalfa Plant In Symbiosissupporting

confidence: 76%

“…[24], it has been reported that no signiicant correlation was observed between leaf area and relative water content (RWC) and between g s and RWC, while leaf area was found to be highly correlated (r 2 = 0.674) at g s . Thus, we suggest that this could have positive indirect efects on RWC by controlling stomata behaviour, maintaining the leaf area and facilitating water uptake in the event of water deicit [60].…”

Section: Efect On Alfalfa Plant In Symbiosismentioning

confidence: 99%

“…The reduction of stomatal conductance (g s ) and stomatal density is among the remarkable responses to water deicit in alfalfa plants [23,24]. As a consequence of the stomata closure, the difusion of CO 2 from the atmosphere to the carboxylation site is reduced, which inluences the activity of RuBisCO as well as other enzymes such as sucrose phosphate synthase (SPS) and nitrate reductase (NRA), whose inhibition is often considered to be the main cause of the decrease of water-deicient photosynthesis [25].…”

Section: Efect On Photosynthesismentioning

confidence: 99%

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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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Section: Efect On Alfalfa Plant In Symbiosissupporting

confidence: 76%

Section: Efect On Alfalfa Plant In Symbiosismentioning

confidence: 99%

Section: Efect On Photosynthesismentioning

confidence: 99%

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Alfalfa and Its Symbiosis Responses to Osmotic Stress

Mouradi¹,

Farissi²,

Bouizgaren³

et al. 2018

New Perspectives in Forage Crops

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“…Efficient seed germination, rapid and uniform seedlings emergence lead to successful culture establishment (Chen and Arora, 2011). The Moroccan alfalfa populations are considered as moderately tolerant to drought and salinity but there is a variant behavior within a lot of them (Bouizgaren, 2007;Latrach et al, 2014;Mouradi et al, 2016). In addition, many species and sub-species of Medicago also exhibit traits of agronomic interest, such as tolerance to grazing (rooting ability and regrowth) and disease (Bouizgaren, 2007).…”

Section: Introductionmentioning

confidence: 99%

Osmopriming improves seeds germination, growth, antioxidant responses and membrane stability during early stage of Moroccan alfalfa populations under water deficit

Mouradi

Bouizgaren

Farissi

et al. 2016

Chilean J. Agric. Res.

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Osmopriming has a positive effect on the enhancement of seeds germination and seedlings growth, especially under stress conditions. This study investigated the effects of osmopriming with polyethylene glycol on alfalfa (Medicago sativa L.) seeds germination and seedlings antioxidant responses under drought stress. Seeds of five Moroccan alfalfa populations and an American Moapa variety were used to investigate the effect of osmopriming on seeds germination, seedlings growth, activities of antioxidant enzymes and membrane stability under two water deficit levels (-0.45 and -0.75 MPa). Seeds were primed with polyethylene glycol (PEG6000) (-0.6 MPa) for 24 h at 25 °C. The results showed that treated seeds presented higher germination rate and growth of 8 d-old seedlings than untreated ones. Particularly, osmoprimed seeds of 'Adis-Tata' (Ad) and 'Riche' (Rc) populations presented the highest final germination percentages of 90.8% and 64%, respectively, and seedlings shoot and root lengths under both levels of water deficit. The priming treatment enhanced the activity of peroxidase (PO) and catalase (CAT) and reduced the malonyldialdehyde (MDA) content and the electrolyte leakage under water deficit. Generally, the success of germination was positively correlated to PO and CAT activities and the degree of membrane stability in drought tolerant populations. However, the positive effect of the osmopriming technique on alfalfa drought tolerance remains limited in some tested populations, and severe water stress could inhibit germination and cause damages of alfalfa seedlings.

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“…Some researchers have not found any changes in the first days of salt stress [11], while other reported significant decreases in the F v /F m under severe salinity and drought [24]. Mouradi et al, [14] and Fghire et al, [15] proved the efficiency of this tool for determining more drought tolerant genotypes of alfalfa and quinoa respectively. As well as drought, PSII performance decreased under salinity reflected by the decrease in the F v /F m ratio [12].…”

Section: Discussionmentioning

confidence: 99%

Study of effects of seawater salt spray on growth, chlorophyll fluorescence and chlorophyll content in three coastal species of Morocco

Kouali¹

2017

JMES

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Effects of water deficit on growth, nodulation and physiological and biochemical processes inMedicago sativa-rhizobia symbiotic association

Cited by 45 publications

References 39 publications

Alfalfa and Its Symbiosis Responses to Osmotic Stress

Alfalfa and Its Symbiosis Responses to Osmotic Stress

Osmopriming improves seeds germination, growth, antioxidant responses and membrane stability during early stage of Moroccan alfalfa populations under water deficit

Study of effects of seawater salt spray on growth, chlorophyll fluorescence and chlorophyll content in three coastal species of Morocco

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