Le Sodium et le Potassium chez <i>Suaeda vulgaris</i>

Binet, P

doi:10.1111/j.1399-3054.1963.tb08339.x

Cited by 9 publications

(3 citation statements)

References 2 publications

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“…The pattern of increases and decreases for K, Ca, and Mg in aging leaves is consistent at each of the NaCl treatments and is similar to those of other investigators (Albert, 1975;Greenway et al, 1965). The decline in K has been shown to occur as a result of retranslocation to younger leaves (Binet, 1963;Greenway et al, 1965) and may be responsible for the decreases with aging observed in this study (Fig. 2B, C, D).…”

Section: Regulanon Of Salt Concentrations In Plantsupporting

confidence: 52%

Salt Regulation and Leaf Senescence in Aging Leaves of Jaumea carnosa (Less.) Gray (Asteraceae), a Salt Marsh Species Exposed to NaCl Stress

Omer

Horvath

Setaro

1983

American Journal of Botany

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The effects of increasing salt stress on leaf senescence and salt regulation were investigated in the halophyte Jaumea carnosa in hydroponic culture experiments. The plants were grown in Hoagland's nutrient solution plus additional NaCl salt (0, 300,400, 500 mMNaCl). Decreases in nucleic acids, protein, and chlorophyll were used as indicators of leaf senescence. The results indicated no definitive pattern of acceleration in leaf senescence with increasing salt stress. Salt regulation was also unaffected as leaves aged under increasing NaCI concentrations. The results are consistent with those of previous studies of the halophyte which indicated that the species was very tolerant of high NaCI concentrations.

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Section: Regulanon Of Salt Concentrations In Plantsupporting

confidence: 52%

Salt Regulation and Leaf Senescence in Aging Leaves of Jaumea carnosa (Less.) Gray (Asteraceae), a Salt Marsh Species Exposed to NaCl Stress

Omer

Horvath

Setaro

1983

American Journal of Botany

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“…Like many other halophytes (Collander 1941;Takeda 1954;Black 1960;Scholander et al 1962Scholander et al , 1966Binet 1963;Greenway and Rogers 1963;Biebl and Kinzel 1965;Rickard 1965;Elzam 1966), shoot tissue of A. marina does not exclude salt but absorbs it in substantial amounts. On a dry basis, leaf tissue of seedlings used in this work contained 1· 0% potassium, 4·1 % sodium, and 7·5% chloride.…”

Section: (D) Adaptive Significancementioning

confidence: 99%

Preferential Absorption of Potassium by Leaf Tissue of the Mangrove, Avicennia Marina: An Aspect of Halophytic Competence in Coping with Salt

Rains¹,

Epstein²

1967

Aust. Jnl. Of Bio. Sci.

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SummaryOne aspect of the salt tolerance of the mangrove, Avicennia marina, was investigated: the preferential absorption of potassium by leaf tissue in the presence of high concentrations of salt (sodium chloride). The rate of absorption of potassium, over the concentration range 0·02 to 1·5 mM, follows the Michaelis-Menten relation, approaching the theoretical maximum, V max, at 1· 5 mM. The apparent Michaelis constant is 0·20 mM. At higher concentrations, up to 50 mM potassium, the rate of potassium absorption reaches values several times higher than the theoretical maximum calculated on the basis of the relation applying over the low range of concentrations, indicating the operation of a second mechanism of absorption. At both low (1 mM) and high (10 mM) concentrations of potassium, its absorption was little affected by sodium chloride concentrations up to 200 mM. At 10 mM potassium, sodium chloride at concentrations up to and including 500 mM (more than its concentration in sea.water) failed to interfere with the absorption of potassium.~,,~,

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“…Recently, Cooper (1982) and Rozema et al (1985) have made multi-species studies in relation 299 to both salinity and waterlogging aspects of seawater inundation and both conclude that next to salinity effects waterlogging plays an important part in salt-marsh vegetation zonation and succession. Evidence for the importance of other factors than salinity also comes from the fact that highly salttolerant species such as Suaeda maritima (Binet 1963;Flowers et al, 1976) and Halirnioneportulacoides (Kappen & Maier, 1973), show a preference for well-drained sandy sites on salt marshes (e.g. creek edges).…”

Section: Discussionmentioning

confidence: 99%

Differential response of salt-marsh species to variation of iron and manganese

1985

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Salt-marsh plants of the lower, middle and upper marsh were compared in their response to iron and manganese. The species studied showed differential sensitivity to high concentrations of Fe (1 000/zM) and Mn (10 000 #M) in hydroculture experiments, species of the lower marsh being more resistant than species of the upper marsh. Fe and Mn concentrations in the root were higher than in the shoot, which was also found in plants inundated with seawater. High Fe and Mn concentrations in the root are probably the result of the oxidizing power of plant roots with a subsequent low translocation of Fe (II) and Mn (II) to the shoot. At high (toxic) Fe and Mn levels in the nutrient solution, Fe and Mn concentrations were much higher in the shoots of sensitive species than in resistant species. The P content of roots and shoots was not influenced by increased Fe and Mn concentrations. Fe and Mn resistance in Spartina anglica and Juncusgerardii, may be in part due to a high root porosity. Other species, however, that are similarly resistant to Fe and Mn lack a well-developed aerenchym. Root porosity, radial oxygen loss and Fe (II) and Mn (II) exclusion by oxidation to Fe (III) (hydr)oxides deposited on the roots form part of the resistance mechanism of hygrohalophytes to Fe and Mn; the differences in this respect between the species may also be due to other metabolic aspects.

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Le Sodium et le Potassium chez Suaeda vulgaris

Cited by 9 publications

References 2 publications

Salt Regulation and Leaf Senescence in Aging Leaves of Jaumea carnosa (Less.) Gray (Asteraceae), a Salt Marsh Species Exposed to NaCl Stress

Salt Regulation and Leaf Senescence in Aging Leaves of Jaumea carnosa (Less.) Gray (Asteraceae), a Salt Marsh Species Exposed to NaCl Stress

Preferential Absorption of Potassium by Leaf Tissue of the Mangrove, Avicennia Marina: An Aspect of Halophytic Competence in Coping with Salt

Differential response of salt-marsh species to variation of iron and manganese

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