Differences in efficient metabolite management and nutrient metabolic regulation between wild and cultivated barley grown at high salinity

Yousfi, Sabah; Rabhi, Mokded; Hessini, Kamel; Abdelly, Chédly; Gharsalli, Mohamed

doi:10.1111/j.1438-8677.2009.00265.x

Cited by 17 publications

(20 citation statements)

References 40 publications

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“…These results are in agreement with those of Yousfi et al (2010) who reported better salt tolerance of this species as compared to H. vulgare. More importantly, our results point out that, contrarily to our expectations, mild salinity may be beneficial for the plant ability to cope with P deficiency stress.…”

Section: Discussionsupporting

confidence: 93%

“…4, the calculated values (dashed lines) are in reasonable agreement with the observed ones, suggesting that the considered solutes were the main determinants of the leaf osmotic potential. Neverthless, Yousfi et al (2010) found that at 100 mM NaCl, Hordeum maritimum used inorganic solutes (such as Na ? ) for osmotic adjustment and kept organic solutes and a large part of K ?…”

Section: Discussionmentioning

confidence: 99%

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Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

et al. 2011

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Hordeum maritimum (Poacea) is a facultative halophyte potentially useful for forage production in saline zones. Here, we assessed whether moderate NaCl-salinity can modify the plant response to phosphorus (P) shortage. Plants were cultivated for 55 days under low or sufficient P supply (5 or 60 lmol plant -1 week -1 KH 2 PO 4 , respectively), with or without 100 mM NaCl. When individually applied, salinity and P deficiency significantly restricted whole-plant growth, with a more marked effect of the latter stress. Plants subjected to P deficiency showed a significant increase in root growth (as length and dry weight) and root/ shoot DW ratio. Enhanced root growth and elongation presumably correspond to the well-known root adaptive response to mineral deficiency. However, leaf relative water content, leaf P concentration, and leaf gas exchange parameters were significantly restricted. The interactive effects of salinity and P deficiency were not added one to another neither on whole plant biomass nor on plant nutrient uptake. Indeed, 100 mM NaCl-addition to P-deficient plants significantly restored the plant growth and improved CO 2 assimilation rate, root growth, K ? /Na ? ratio and leaf proline and soluble sugar concentrations. It also significantly enhanced leaf total antioxidant capacity and leaf anthocyanin concentration. This was associated with significantly lower leaf osmotic potential, leaf Na ? and malondialdehyde (MDA) concentration. Taken together, these results suggest that mild salinity may mitigate the adverse effects of phosphorus deficiency on H. maritimum by notably improving the plant photosynthetic activity, the osmotic adjustment capacity, the selective absorption of K ? over Na ? and antioxidant defence.

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Section: Discussionsupporting

confidence: 93%

Section: Discussionmentioning

confidence: 99%

Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

et al. 2011

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“…In the present study, drought reduced growth on a whole-plant FW and DW basis of both species, especially after withholding water for at least 14 d. Wild barley was less affected by drought than cultivated barley. Yousfi et al (2010) reported a similar response to salinity stress and related this behavior to the halophytic character of wild barley (Fig. 2).…”

Section: Discussionmentioning

confidence: 60%

“…Lamsi; Hessini et al, 2015), provided by the National Agronomy Institutes of Tunisia (INAT), and seeds of wild barley (Hordeum maritimum L.; Yousfi et al, 2010), collected from Soliman Sebkha (saline depression located 30 km south of Tunis, semi-arid area), were germinated on two layers of Whatman filter paper moistened with 10 mL sterile deionized water in the dark at 25°C. After 7 d, when the second leaves appeared, seedlings were transferred to 5-L plastic pots (100 pots with two plants per pot) filled with 5 kg of soil taken from the agricultural parcel at the Center of Biotechnology of Borj Cedria.…”

Section: Plant Materials and Growth Conditionsmentioning

confidence: 99%

Comparative effect of drought duration on growth, photosynthesis, water relations, and solute accumulation in wild and cultivated barley species

Mejri

Siddique

Saif

et al. 2016

J. Plant Nutr. Soil Sci.

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Drought is a major factor limiting crop production worldwide. Barley is a well-adapted cereal that is largely grown on dry marginal land where water and salinity are the most prevalent environmental stresses. This study was carried out to investigate the effects of drought stress and subsequent recovery on growth, photosynthetic activity, water relations, osmotic adjustment (OA), and solute accumulation of wild (Hordeum maritimum) and cultivated barley (H. vulgare L.). In a pot experiment, 60 d old seedlings were subjected to drought stress for 0, 7, 14, 21, or 28 d, and then re-watered to recover for up to 21 d. Plants were harvested at the end of each of these drought/recovery treatments. Drought significantly reduced fresh and dry weights at the wholeplant level, photosynthetic activities, and solute and water potentials, while increasing leaf Na + and K + concentrations. The adverse effects of drought on growth were more marked in cultivated barley than in wild barley and the reverse was true for photosynthetic activities. During recovery, all wild barley seedlings completely recovered. For cultivated barley seedlings, rehydration had a beneficial effect on growth and photosynthesis, independent of treatment duration, but complete recovery did not occur. The reduction in leaf solute potential at full turgor in drought-stressed barley, relative to the control, suggests active OA which was more significant in wild barley than in cultivated barley. OA was mainly due to the accumulation of inorganic (K + in cultivated barley and Na + in wild barley) and organic (soluble sugars and proline) solutes. The results suggest that OA is an important component of the drought-stress adaptation mechanism in wild barley, but is not sufficient to contribute to drought tolerance in cultivated barley. In the latter species, the results show that even short periods (as little as 7 d) of water deficit stress had considerable long-term effects on plant growth.

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“…In contrast, soluble carbohydrate concentrations increased with salt stress, indicating their contribution to osmotic adjustment (Yousfi et al . ). Assuming that 40.75 nmol·kg −1 of symplastic water corresponds to 0.1 MPa (Fricke & Peters ), the contribution of soluble sugar was lower and did not exceed 2.2% of osmotic adjustment, even with 200 m m NaCl.…”

Section: Discussionmentioning

confidence: 97%

Salt tolerance of Beta macrocarpa is associated with efficient osmotic adjustment and increased apoplastic water content

et al. 2015

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The chenopod Beta macrocarpa Guss (wild Swiss chard) is known for its salt tolerance, but the mechanisms involved are still debated. In order to elucidate the processes involved, we grew wild Swiss chard exposed to three salinity levels (0, 100 and 200 mm NaCl) for 45 days, and determined several physiological parameters at the end of this time. All plants survived despite reductions in growth, photosynthesis and stomatal conductance in plants exposed to salinity (100 and 200 mm NaCl). As expected, the negative effects of salinity were more pronounced at 200 mm than at 100 mm NaCl: (i) leaf apoplastic water content was maintained or increased despite a significant reduction in leaf water potential, revealing the halophytic character of B. macrocarpa; (ii) osmotic adjustment occurred, which presumably enhanced the driving force for water extraction from soil, and avoided toxic build up of Na(+) and Cl(-) in the mesophyll apoplast of leaves. Osmotic adjustment mainly occurred through accumulation of inorganic ions and to a lesser extent soluble sugars; proline was not implicated in osmotic adjustment. Overall, two important mechanisms of salt tolerance in B. macrocarpa were identified: osmotic and apoplastic water adjustment.

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Differences in efficient metabolite management and nutrient metabolic regulation between wild and cultivated barley grown at high salinity

Cited by 17 publications

References 40 publications

Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

Alleviation of phosphorus deficiency stress by moderate salinity in the halophyte Hordeum maritimum L.

Comparative effect of drought duration on growth, photosynthesis, water relations, and solute accumulation in wild and cultivated barley species

Salt tolerance of Beta macrocarpa is associated with efficient osmotic adjustment and increased apoplastic water content

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