Genetic diversity of salt tolerance in tetraploid alfalfa (Medicago sativa L.)

Benabderrahim, Mohamed Ali; Guiza, Marwa; Haddad, Mansour

doi:10.1007/s11738-019-2993-8

Cited by 24 publications

(27 citation statements)

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“…Table 2. Salt-tolerant alfalfa cultivars and their fall dormancy (FD) and growth stages (G, germination and/or F, forage production) for salt tolerance (ST) (Source: National Alfalfa & Forage Alliance, [89] A number of studies have evaluated the performance of alfalfa germplasm under salt stress [16,[92][93][94]. The genetic variability among nine alfalfa populations in response to sulfate salt revealed a high relative shoot mass of 8 dS m −1 in "Halo" alfalfa, which had a lower seed emergence than that of "Rugged" [16].…”

Section: Breeding For Salt Tolerancementioning

confidence: 99%

“…The genetic variability among nine alfalfa populations in response to sulfate salt revealed a high relative shoot mass of 8 dS m −1 in "Halo" alfalfa, which had a lower seed emergence than that of "Rugged" [16]. Benabderrahim et al [92] studied the genetic diversity of 36 alfalfa populations from Tunisia using 12 agronomic and physiological traits and identified three salt-tolerant types. Jiang et al [93] have applied random amplified polymorphic DNA (RAPD) markers and clustered 25 salt-tolerant alfalfa populations into nine clusters, suggesting that salt-tolerant alfalfa germplasm possess a certain genetic diversity which can be utilized in salt-tolerant breeding.…”

Section: Breeding For Salt Tolerancementioning

confidence: 99%

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Morphological, Physiological, and Genetic Responses to Salt Stress in Alfalfa: A Review

Bhattarai

Biswas

et al. 2020

Agronomy

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Alfalfa (Medicago sativa L.) is an important legume forage crop. However, its genetic improvement for salt tolerance is challenging, as alfalfa’s response to salt stress is genetically and physiologically complex. A review was made to update the knowledge of morphological, physiological, biochemical, and genetic responses of alfalfa plants to salt stress, and to discuss the potential of applying modern plant technologies to enhance alfalfa salt-resistant breeding, including genomic selection, RNA-Seq analysis, and cutting-edge Synchrotron beamlines. It is clear that alfalfa salt tolerance can be better characterized, genes conditioning salt tolerance be identified, and new marker-based tools be developed to accelerate alfalfa breeding for salt tolerance.

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Section: Breeding For Salt Tolerancementioning

confidence: 99%

Section: Breeding For Salt Tolerancementioning

confidence: 99%

Morphological, Physiological, and Genetic Responses to Salt Stress in Alfalfa: A Review

Bhattarai

Biswas

et al. 2020

Agronomy

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“…These data show that E. sativa could be an includer type and it might possess an active Na + tolerance mechanism. We have reported a moderate but statistically significant increase in K + concentration in the salt-treated group as compared with control ( Benabderrahim et al, 2020). E. sativa has been reported to exhibit significant genetic diversity (Slater, 2013).…”

Section: Discussionmentioning

confidence: 70%

Peer Review #2 of "Evaluation of salt tolerance in Eruca sativa accessions based on morpho-physiological traits (v0.1)"

2020

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Manuscript to be reviewed the most significant traits for resolving inter-accession variability. Based on MFV of the tested traits, accessions were categorized into five standard groups. Among 25 accessions, 1 accession was ranked as highly tolerant, 4 as tolerant while 15 accessions were ranked as moderately tolerant. Of the remaining 5 accessions, 4 were ranked as sensitive while 1 accession as highly sensitive. Conclusion. E. sativa accessions were found to exhibit significant genetic diversity in all the tested traits. A few most significant traits for dissecting the genetic variability were identified that could be used for future large-scale germplasm screening in E. sativa. Salt tolerant accessions could be a good resource for future breeding programs aiming to improve salt stress tolerance.

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“…Plants are known to exhibit diversity in salt stress tolerance (Sabir, Ashraf & Akram, 2011;Al-Ashkar et al, 2019;Wu et al, 2019;Mohamed et al, 2020;Benabderrahim, Guiza & Haddad, 2020). E. sativa has been reported to exhibit significant genetic diversity (Slater, 2013).…”

Section: Discussionmentioning

confidence: 99%

Evaluation of salt tolerance in Eruca sativa accessions based on morpho-physiological traits

Afsar

Bibi

Ahmad

et al. 2020

PeerJ

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Background Salinity is one of the most lethal abiotic stresses which affect multiple aspects of plant physiology. Natural variations in plant germplasm are a great resource that could be exploited for improvement in salt tolerance. Eruca sativa (E. sativa) exhibits tolerance to abiotic stresses. However, thorough evaluation of its salt stress tolerance and screening for traits that could be reliably applied for salt tolerance needs to be studied. The current study was designed to characterize 25 E. sativa accessions, originating from diverse geographical regions of Pakistan, for the salt stress tolerance. Methods Salt stress (150 mM NaCl) was applied for 2 weeks to the plants at four leaf stage in hydroponics. Data of the following morpho-physiological traits were collected from control and treated plants of all the accessions: root length (RL), shoot length (SL), plant height (PH), leaf number (LN), leaf area (LA), fresh weight (FW), dry weight (DW), chlorophyl content (SPAD), electrolyte leakage (EL), relative water content (RWC), gas exchange parameters and mineral ion content. Salt tolerance was determined based on membership function value (MFV) of the tested traits. Results Compared with control, the salt-stressed group had significantly reduced mean SL, RL, PH, LN, LA, FW, DW and SPAD. NaCl treatment triggered a slight increase in EL in few accessions. Mean RWC of control and treated groups were not significantly different although few accessions exhibited variation in this trait. Salt stress caused a significant reduction in photosynthesis rate (PR), transpiration rate (TR) and stomatal conductance (SC) but intercellular CO2 (Ci) was not significantly different between control and treated groups. Compared with control, the salt-stressed plants accumulated significantly higher Na+, K+ and Ca2+ while significantly lower Mg2+. K+/Na+ ratio was significantly decreased in salt-stressed plants compared with control. Importantly, significant inter-accession variations were found for all the tested traits. The principal component analysis identified SL, RL, PH, LN, LA, FW, DW and PR as the most significant traits for resolving inter-accession variability. Based on MFV of the tested traits, accessions were categorized into five standard groups. Among 25 accessions, one accession was ranked as highly tolerant, four as tolerant while 15 accessions were ranked as moderately tolerant. Of the remaining five accessions, four were ranked as sensitive while one accession as highly sensitive. Conclusion E. sativa accessions were found to exhibit significant genetic diversity in all the tested traits. A few most significant traits for dissecting the genetic variability were identified that could be used for future large-scale germplasm screening in E. sativa. Salt tolerant accessions could be a good resource for future breeding programs aiming to improve salt stress tolerance.

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Genetic diversity of salt tolerance in tetraploid alfalfa (Medicago sativa L.)

Cited by 24 publications

References 54 publications

Morphological, Physiological, and Genetic Responses to Salt Stress in Alfalfa: A Review

Morphological, Physiological, and Genetic Responses to Salt Stress in Alfalfa: A Review

Peer Review #2 of "Evaluation of salt tolerance in Eruca sativa accessions based on morpho-physiological traits (v0.1)"

Evaluation of salt tolerance in Eruca sativa accessions based on morpho-physiological traits

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