Drought tolerance traits in <i>Medicago</i> species: A review

Slama, Inès; Talbi, Ons; Yousfi, Nasreddine; Rouached, Aïda; Gharred, Jihed; Jdey, Asma; Hanana, Mohsen; Abdelly, Chédly

doi:10.1080/15324982.2021.1936289

Cited by 15 publications

(5 citation statements)

References 83 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, it was obvious that alfalfa reduced biomass production by 45% in cases of water deficit (Figure 1). This result matches with results from [70], showing that the reduction of plant biomass production of medic plants ranged between 12 and 73%. However, it could be shown that the addition of Bc (biochar) to the soil substrate led to a significant increase in the biomass production of M. ciliaris in both water regimes (see also Sensitivity index in Table 1).…”

Section: Adjustment Of Growth and Water Relationssupporting

confidence: 91%

“…Independent of the presence of Bc in the culture medium and in line with our findings, drought-stressed plants exhibit a higher root/shoot DW ratio than plants growing under adequate water supply (Figure 2). This may be related to the preferential allocation of dry matter to roots [70] and may facilitate adaptation to drought by limiting the transpiring leaf area and extracting water residuals [74].…”

Section: Adjustment Of Growth and Water Relationsmentioning

confidence: 99%

See 1 more Smart Citation

Impact of Biochar Application at Water Shortage on Biochemical and Physiological Processes in Medicago ciliaris

Gharred

Derbali

et al. 2022

Plants

Self Cite

View full text Add to dashboard Cite

The application of biochar is mostly used to improve soil fertility, water retention capacity and nutrient uptake. The present study was conducted in order to study the impact of biochar at water deficiency conditions on the physiological and biochemical processes of Medicago ciliaris seedlings. Seedlings were cultivated under greenhouse conditions in pots filled with a mixture of soil and sand mixed in the presence or absence of 2% biochar. Plants of uniform size were subjected after a pretreatment phase (72 days) either to low (36% water holding capacity, water potential low) or high soil water potential (60% water holding capacity, water potential high). Pots were weighed every day to control and maintain a stable water holding capacity. In Medicago ciliaris, drought led to a significant reduction in plant growth and an increase in the root/shoot ratio. The growth response was accompanied by a decreased stomatal conductance and a reduction of the net CO2 assimilation rate and water use efficiency. The associated higher risk of ROS production was indicated by a high level of lipid peroxidation, high antioxidant activities and high proline accumulation. Soil amendment with biochar enhanced the growth significantly and supported the photosynthetic apparatus of Medicago ciliaris species by boosting chlorophyll content and Anet both under well and insufficient watered plants and water use efficiency in case of water shortage. This increase of water use efficiency was correlated with the biochar-mediated decrease of the MDA and proline contents in the leaves buffering the impact of drought on photosynthetic apparatus by increasing the activity of enzymatic antioxidants SOD, APX, GPOX and GR and non-enzymatic antioxidants, such as AsA and DHAsA, giving the overall picture of a moderate stress response. These results confirmed the hypothesis that biochar application significantly reduces both the degree of stress and the negative impact of oxidative stress on Medicago ciliaris plants. These results implied that this species could be suitable as a cash pasture plant in the development of agriculture on dry wasteland in a future world of water shortages.

show abstract

Section: Adjustment Of Growth and Water Relationssupporting

confidence: 91%

Section: Adjustment Of Growth and Water Relationsmentioning

confidence: 99%

Impact of Biochar Application at Water Shortage on Biochemical and Physiological Processes in Medicago ciliaris

Gharred

Derbali

et al. 2022

Plants

Self Cite

View full text Add to dashboard Cite

show abstract

“…For example, after a physiological analysis of twelve accessions of Lotus tenuis , the authors were able to pinpoint the two most contrasting populations in terms of water-stress tolerance [ 6 ]. The same intraspecific variability was also observed for cultivars of different Medicago species [ 7 ]. Upon drought, photosynthesis is one of the first physiological processes to be affected [ 8 ].…”

Section: Introductionsupporting

confidence: 64%

Cowpea Physiological Responses to Terminal Drought—Comparison between Four Landraces and a Commercial Variety

Nunes

Moreira

Pais

et al. 2022

Plants

View full text Add to dashboard Cite

Cowpea (Vigna unguiculata) is a robust legume; nevertheless, yield is always affected by drought, especially when it occurs during reproductive growth and seed filling. Considered a key crop in the effort to attain food security, and a suitable crop for a scenario of climate change, modern disregard for cowpea landraces is particularly detrimental as it causes genetic variability loss, compromising breeding efforts. To contribute to the evaluation of the cowpea germplasm, four Portuguese landraces (L1, L2, L3, L4) were compared with a commercial variety (CV) to evaluate their physiological responses to terminal drought and their inter-variation on productivity, under semi-controlled conditions. Despite no differences in relative water content (RWC) between the CV and the landraces under water deficit (WD), differences in leaf water potential (Ψ) defined the CV as having an isohydric control of stomata in contrast with anisohydric control for landraces. There was an identical decrease in the photosynthetic rate for all plants under stress, caused by both stomatal and non-stomatal limitations, namely, damages at the level of photosystem II as indicated by fluorescence measurements. Instantaneous water use efficiency (iWUE) was improved with stress in L1 and L3. Maintenance of higher relative chlorophyll content for longer periods in the CV revealed a stay-green phenotype. The slim differences observed in terms of stomatal control, iWUE and progression of senescence between the CV and the landraces under WD led to quite important differences in terms of productivity, as inferred from improved yield (number of pods and number of grains per plant). This is a clear result of pragmatic on-farm selection. On one hand it shows that small differences in stomatal responses or water saving strategies under WD may lead to desirable outcomes and should therefore be considered during breeding. On the other hand, it suggests that other traits could be explored in view of drought adaptation. These results highlight the need to preserve and characterize as many genetic pools as possible within a species.

show abstract

“…Phenolic compounds such as ferulic acid, syringic acid, tannic acid, and p-coumaric acid are abundantly present. These compounds have a high capacity to inhibit the formation of free radicals with a bene cial effect on health and as a result dietary supplements and antioxidant market is currently showing an increasing trend, the phenolic and avonoid compounds being the major contributors (Inès et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

WITHDRAWN: An eco-extraction procedure for solvent free extraction of plant phenolics using microwave hydro diffusion and gravity (MHG) model

Sinha,

Mukherjee,

Chouhan

et al. 2024

Preprint

View full text Add to dashboard Cite

The current work exemplifies a strategic implementation of blended mode microwaving in the MHG model for the solvent-free extraction of phenolics from the leaves of the plant Medicago polymorpha. Blended mode comprises of a mix of 510W microwave power level for 5 min, followed by 340W exposure for 5 min and then finally prolonged exposure of 170W in cycles of 5 min each till the end point is reached. The extraction performance was assessed by the total phenolic and flavonoid contents which was found to be 65.1 and 66.7 mg GAE/QE per g of dried extract respectively, for the extract obtained from MHG (blended mode). Soxhlet extract on the other hand could produce 45.4 and 52.4 mg GAE/QE per g of dried extract. In total 18 phenolic principles were detected out of which 09 compounds showed more than 50% depletion in the extract obtained from Soxhlet. In addition to this extract obtained from MHG showed better stability as only 18.9% degradation was reported in a span of 60 days when compared to 64.1% for the Soxhlet extract for the same length of time. Improved thermal stability and antioxidant activity were the other add on features for the extract obtained through MHG (blended mode). Such technologies embraces environment and progresses sustainably.

show abstract

Drought tolerance traits in Medicago species: A review

Cited by 15 publications

References 83 publications

Impact of Biochar Application at Water Shortage on Biochemical and Physiological Processes in Medicago ciliaris

Impact of Biochar Application at Water Shortage on Biochemical and Physiological Processes in Medicago ciliaris

Cowpea Physiological Responses to Terminal Drought—Comparison between Four Landraces and a Commercial Variety

WITHDRAWN: An eco-extraction procedure for solvent free extraction of plant phenolics using microwave hydro diffusion and gravity (MHG) model

Contact Info

Product

Resources

About