Salinity‐calcium interactions on root growth and osmotic adjustment of two corn cultivars differing in Salt Tolerance

Cramer, Grant R.; Abdel-Basset, Refat; Seemann, Jeffrey R.

doi:10.1080/01904169009364165

Cited by 25 publications

(10 citation statements)

References 11 publications

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“…This could be responsable of the major growth reduction observed in this cultivar. Similar results have been previously reported by Cramer et al (6) for corn hybrids.…”

Section: Discussionsupporting

confidence: 93%

Genotipic responses of olive plants to sodium chloride

Tattini¹,

Bertoni²,

Caselli³

1992

Journal of Plant Nutrition

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The effect of NaCl-salinity on growth responses and tissue mineral content was investigated for two olive (Olea europaea L.) genotypes of different vigor, Leccino and Frantoio. Forty-day-old self-rooted plants were grown for a 60-day period in a sand culture system supplied with a 1/2 strength Hoagland solution with the addition of 0,12.5,25,50, and 100 mM NaCl. Plants were harvested at 12-day intervals, and the dry weights of shoot, and principal and lateral roots were evaluated. Relative growth rate (RGR) was also estimated. At the same time, plant tissues were analysed for N,

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“…This could be responsable of the major growth reduction observed in this cultivar. Similar results have been previously reported by Cramer et al (6) for corn hybrids.…”

Section: Discussionsupporting

confidence: 93%

Genotipic responses of olive plants to sodium chloride

Tattini¹,

Bertoni²,

Caselli³

1992

Journal of Plant Nutrition

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“…6A, B) agree with these findings. High Ca significantly increased the K + concentration in the apical 2 cm region of corn roots at high NaC1 concentration (Cramer et al 1990), but did not significantly influence K uptake in cotton roots (Cramer et al 1987). Analysis of our data with the perspective of spatial distribution, however, indicates that high Ca concentration did influence K deposition, but differentially depending on the spatial locations.…”

Section: Relationships Between Contents Deposition Rates and Flux Stmentioning

confidence: 59%

Spatial distribution of solutes, K, Na, Ca and their deposition rates in the growth zone of primary cotton roots: Effects of NaCl and CaCl2

Zhong

Läuchli

1994

Planta

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Abstract.Cotton (Gossypium hirsutum L. cv. Acala S J-2) seedlings were grown in modified Hoagland nutrient solution with or without 150 mM NaC1 and supplemental 10 mM CaC12. The spatial distribution of bulk-tissue osmotic potential (U?s) and total osmotica, K, Na and Ca contents were determined in the growth zone of the primary root. This information was combined with the growth-velocity data from an earlier study (Zhong and L/iuchli 1993) to estimate net deposition rates of osmoticum, water, K, Na and Ca by using the continuity equation. The u?~ was essentially uniform along the growth region for all treatments and considerably lowered by 150 mM NaC1 in the medium. Total osmotica deposition was well synchronized with growth and deposition rates were enhanced by 150 mM NaC1. Osmoregulation in the treatments with 150 mM NaC1 was indicated by an apparent solute accumulation which appeared to be due to the enhancement of osmoticum deposition rates. The presence of 150 mM NaC1 greatly reduced the deposition rates of K and Ca throughout the growth zone; 10 mM Ca mitigated this effect only on K deposition in the apical 2.5-mm region. The deposition rate of Na was increased greatly by 150 mM NaC1; the increase was reduced by 10 mM Ca. At 150 mM NaC1, selectivity of K versus Na of the root was enhanced greatly in the apical 2 mm region by the presence of 10 mM Ca; this mitigating effect by Ca declined rapidly with distance from the root tip. We conclude that one possible mechanism by which supplemental Ca alleviates the inhibitory effects of NaC1 on cotton root growth is by maintaining plasma-membrane selectivity of K over Na. *Present address:Department of Integrative Biology, University of California, Berkeley, CA 94720, USA Abbreviations and symbol: HCa, LCa = high (10 mM) and low (1 mM) CaCI2; HNa, LNa = high (150 mM) and low (1 mM) NaC1; T~ = osmotic potential Correspondence to: H. Zhong; FAX: I (510) 643 6264;

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“…Calcium enhanced the uptake of K + in pigeon pea (Cajanus cajan L. Huth) resulting in a higher concentration of K + in plants grown under saline conditions (Subbarao et al 1990). Cramer et al (1990) reported higher concentrations of K + in the root tips of two corn cultivars in the presence of calcium. Similarly, higher external Ca 2+ may cause a higher Ca 2+ concentration under saline conditions.…”

Section: Discussionmentioning

confidence: 94%

Spatial distributions and net deposition rates of mineral elements in the elongating wheat ( Triticum aestivum L.) leaf under saline soil conditions

Schmidhalter

1998

Planta

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Wheat leaf growth is known to be spatially aected by salinity. The altered spatial distribution of leaf growth under saline conditions may be associated with spatial changes in tissue mineral elements. The objective of this study was to evaluate the spatial distributions of mineral elements and their net deposition rates in the elongating and mature zones of leaf 4 of the main stem of spring wheat (Triticum aestivum L. cv. Lona) during its linear growth phase under saline soil conditions. Plants were grown in an illitic-chloritic silty loam with 0 and 120 mM NaCl. Three days after emergence of leaf 4, sampling was begun at 3 and 13 h into the 16-h light period. Spatial distributions of fresh weight (FW), dry weight (DW), and Na + , K + , Cl A , NO À 3 , Ca 2+ , Mg 2+ , total P, and total N in the elongating and mature tissues were determined on a millimeter scale. The patterns of spatial distribution of Na + , Cl A , K + , NO 3 A , and Ca 2+ in the growing leaves were aected by salinity, while those of Mg 2+ , total P, and total N were not. Sodium, K + , Cl A , Ca 2+ , Mg 2+ , and total N concentrations (mmol á kg A1 FW) were consistently higher at 120 mM NaCl than at 0 mM NaCl along the leaf axis from the leaf base, whereas NO 3 A concentration was lower at 120 mM NaCl. Deposition rates of all nutrients were greatest in the elongation zone. The elongation zone was the strongest sink for mineral elements in the leaf tissues. Local net deposition rates of Na + , Cl A , Ca 2+ , and Mg 2+ (mmol á kg A1 FW á h A1 ) in the most actively elongating zone were enhanced by 120 mM NaCl, whereas for NO 3A this was depressed. The lower supply of NO À 3 to growing leaves may be responsible for the inhibition of growth under saline conditions. Higher tissue concentrations of Na + and Cl A may cause ion imbalance but probably did not result in ion toxicity in the growing leaves. Potassium, Ca 2+ , Mg 2+ , total P, and total N are less plausibly responsible for the reduction in leaf growth in this study. Higher tissue K + and Ca 2+ concentrations at 120 mM NaCl are probably due to the presence of high Ca 2+ in the soil of this study. Abbreviations: D local net deposition rate; DV undisturbed displacement velocity of a segment; total P total phosphorus; SER segmental elongation rate Correspondence to: U. Schmidhalter;

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Salinity‐calcium interactions on root growth and osmotic adjustment of two corn cultivars differing in Salt Tolerance

Cited by 25 publications

References 11 publications

Genotipic responses of olive plants to sodium chloride

Genotipic responses of olive plants to sodium chloride

Spatial distribution of solutes, K, Na, Ca and their deposition rates in the growth zone of primary cotton roots: Effects of NaCl and CaCl2

Spatial distributions and net deposition rates of mineral elements in the elongating wheat ( Triticum aestivum L.) leaf under saline soil conditions

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