The effect of salinity on the growth, water status, and ion content of a leaf succulent perennial halophyte, Suaeda fruticosa (L.) Forssk

Khan, M. Ajmal; Ungar, Irwin A.; Showalter, Allan M.

doi:10.1006/jare.1999.0617

Cited by 223 publications

(39 citation statements)

References 25 publications

(24 reference statements)

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“…Moreover, Munns (1993) proposed that the reduction in leaf cellular turgor is not the main cause for the reduction in stomatal conductance, net assimilation rate and limited leaf expansion in saline environments. Similar results have been reported for Atriplex stocksii (Khan et al 2000a) and Suaeda fruticosa (Khan et al 2000b). Debez et al (2004) demonstrated that succulence is one of the mechanisms that halophytes utilize to deal with the high internal ion concentrations.…”

Section: Discussionsupporting

confidence: 92%

Photosystem II photochemistry and physiological parameters of three fodder shrubs, Nitraria retusa, Atriplex halimus and Medicago arborea under salt stress

2008

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Nitraria retusa and Atriplex halimus (xerohalophytes) plants were grown in the range 0-800 mM NaCl while Medicago arborea (glycophyte) in 0-300 mM NaCl. Salt stress caused a marked decrease in osmotic potential and a significant accumulation of Na ? and Cl -in leaves of both species. Moderate salinity had a stimulating effect on growth rate, net CO 2 assimilation, transpiration and stomatal conductance for the xero-halophytic species. At higher salinities, these physiological parameters decreased significantly, and their percentages of reduction were higher in A. halimus than in N. retusa whereas, in M. arborea they decreased linearly with salinity. Nitraria retusa PSII photochemistry and carotenoid content were unaffected by salinity, but a reduction in chlorophyll content was observed at 800 mM NaCl. Similar results were found in A. halimus, but with a decrease in the efficiency of PSII (F 0 v/F 0 m) occurred at 800 mM. Conversely, in M. arborea plants we observed a significant reduction in pigment concentrations and chlorophyll fluorescence parameters. The marked toxic effect of Na ? and/or Clobserved in M. arborea indicates that salt damage effect could be attributed to ions' toxicity, and that the reduction in photosynthesis is most probably due to damages in the photosynthetic apparatus rather than factors affecting stomatal closure. For the two halophyte species, it appears that there is occurrence of co-limitation of photosynthesis by stomatal and non-stomatal factors. Our results suggest that both N. retusa and A. halimus show high tolerance to both high salinity and photoinhibition while M. arborea was considered as a slightly salt tolerant species.

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Section: Discussionsupporting

confidence: 92%

Photosystem II photochemistry and physiological parameters of three fodder shrubs, Nitraria retusa, Atriplex halimus and Medicago arborea under salt stress

2008

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“…The NaCl‐induced reduction in K + content has been observed in a study of Na + ‐tolerant cells (Stavarek and Rains 1984). Similar changes in leaf [K] are also reported in a halophyte Suaeda fruticosa (Ajmal Khan et al. 2000).…”

Section: Resultssupporting

confidence: 81%

Root Nitrogen Remobilization and Ion Status of Two Alfalfa (Medicago sativa L.) Cultivars in Response to Salinity Stress

Mohammadi

Poustini

Ahmadi

2008

J Agronomy Crop Science

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In a pot experiment the responses of two alfalfa cultivars differing in salt tolerance were evaluated in terms of root nitrogen remobilization rates (RNRR) and their relationship with the ionic status of the plants. A split‐plot design with factorial treatments in three replications was used. Three levels of salinity stress with electrical conductivities (ECs) of 1.2, 7 and 12 ds m−1 were established in irrigation water by using tap water with and without NaCl. The average data taken from plant materials at three defoliations were used for statistical analysis. Each time, plant materials were harvested at the 10 % flowering stage and then 10 days later. From the results observed, it was found that alfalfa shoot growth is highly dependent on RNRR under salinity stress. However, the total N reserves within the roots do not appear to be a limiting factor. The high positive correlation coefficient between shoot K+/Na+ and RNRR (r = 0.77; P = 0.01) indicates that lower demands for N because of diminished metabolic activities within the shoot sink may have reduced the rates of root N utilization. Unlike in some other species, the shoot K+ concentration and contents of alfalfa plants were significantly reduced by increasing salt stress. However, a relatively suitable K+/Na+ ratio of 7.1 is maintained in the shoots at the second level of salinity, as lowering the rates of salt induced an increase in Na+ uptake (Na exclusion). The salt tolerance recognized in the Bami cultivar may be attributed to the 339 % increase in its selectivity rates of K+ over Na+ in ion transport from the soil to the shoots, as the shoot Na+ content did not increase with increasing salt levels.

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“…In order to better understand the plant growth response to NaCl treatment, a two-way analysis of variance was performed and indicated that genotype (V) X treatment (T) interaction factor was highly significant, especially in root (F = 3.69; P < 0.001, Table 2). The decrease of shoot growth paralleled with root growth stimulation and increased shoot/root ratio has been also considered as physiological adaptations to salt stress in several halophytes such as Suaeda maritima (Dajié et al 1997), Plantago coronopus (Koyro 2006) Crithmum maritimum (Ben Amor et al 2005) and Suaeda fruticosa (Khan et al 2000).…”

Section: Discussionmentioning

confidence: 99%

Physiological and biochemical markers for screening salt tolerant quinoa genotypes at early seedling stage

Derbali

Goussi

Koyro

et al. 2020

Journal of Plant Interactions

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The present study was conducted to determine the predictive screening parameters of quinoa salt tolerance that can be applied at early development stages, based on physiological and biochemical approaches. Four quinoa varieties (Tumeko, Red Faro, Kcoito and UDEC-5) were cultivated using hydroponic system, and treated for 2 weeks with different NaCl concentrations (0, 100, 300 and 500 mM). Salt treatment induced a decrease of plant growth depending on NaCl concentrations, plant organs and varieties. Red Faro and UDEC-5 exhibited low level of Na + accumulation and high K/Na selectivity. UDEC-5 showed high stomatal conductance leading to high net photosynthesis, even at 500 mM NaCl. Red Faro and UDEC-5 exhibited low level of lipid peroxidation, high antioxidant activities and high proline accumulation, as an indicator of ROS defense and osmotic adjustment. This study suggested that these physiological and biochemical traits could be used as screening criteria for selecting salt tolerant genotype. ARTICLE HISTORY

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The effect of salinity on the growth, water status, and ion content of a leaf succulent perennial halophyte, Suaeda fruticosa (L.) Forssk

Cited by 223 publications

References 25 publications

Photosystem II photochemistry and physiological parameters of three fodder shrubs, Nitraria retusa, Atriplex halimus and Medicago arborea under salt stress

Photosystem II photochemistry and physiological parameters of three fodder shrubs, Nitraria retusa, Atriplex halimus and Medicago arborea under salt stress

Root Nitrogen Remobilization and Ion Status of Two Alfalfa (Medicago sativa L.) Cultivars in Response to Salinity Stress

Physiological and biochemical markers for screening salt tolerant quinoa genotypes at early seedling stage

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