Nutrient Uptake Responses and Inorganic Ion Contribution to Solute Potential under Salinity Stress in Halophytic Seashore Paspalums

Lee, Geung–Joo; Duncan, R. R.; Carrow, Robert N.

doi:10.2135/cropsci2006.10.0639

Cited by 28 publications

(22 citation statements)

References 38 publications

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“…had been reported to be reduced while Na ? content increased in various species in salinity stress (Grieve and Fujiyama 1987;Awad et al 1990;Lee et al 2007). Wang and Han (2007) reported that silicon supply increased K ?…”

Section: Discussionmentioning

confidence: 98%

Silicon enhances photochemical efficiency and adjusts mineral nutrient absorption in Magnaporthe oryzae infected rice plants

Cai

Chen

et al. 2010

Acta Physiol Plant

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Silicon (Si) has been verified to play an important role in enhancing plant resistance against pathogens, but the exact mechanisms remain unclear. Two near-isogenic lines of rice (Oryza sativa L.), CO39 (blast susceptible), and C101LAC (Pi-1) (blast resistant), were hydroponically grown to study the effects of exogenous silicon application on the changes of disease incidence, mineral nutrient concentrations, chlorophyll content, and photochemical efficiency in Magnaporthe oryzae infected rice plants. Si amendment in nutrient solution at a concentration of 2.0 mM significantly reduced the disease index of rice plants of CO39 and C101LAC (Pi-1). Silicon application alone had no effects on mineral nutrient contents, chlorophyll content, maximum/potential quantum efficiency (F v /F m ), and the maximum primary yield (F v /F 0 ) of photochemistry of PS II in healthy rice leaves. M. oryzae inoculation significantly increased the content of K, Na, Ca, Mg, Fe, and reduced the value of F v /F 0 and F v /F m in rice leaves. However, Si treatment suppressed M. oryzae induced increase of mineral nutrient contents, and significantly increased F v /F 0 and F v /F m value compared with Sideficient infected plants. These results suggest that siliconenhanced resistance to rice blast is associated with an enhancement of photochemical efficiency and adjustment of mineral nutrient absorption in M. oryzae-infected rice plants.

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Section: Discussionmentioning

confidence: 98%

Silicon enhances photochemical efficiency and adjusts mineral nutrient absorption in Magnaporthe oryzae infected rice plants

Cai

Chen

et al. 2010

Acta Physiol Plant

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“…1B, 3B). K þ was the most important cation related to the shoot and root growth of many plants subjected to salt stress (Marschner 1995;Grattan and Grieve 1999;Lee et al 2007). The higher K þ concentration in TF might be one of the reasons for the better growth under salt stress.…”

Section: Discussion Ion Toxicity and Ion Imbalancementioning

confidence: 99%

Comparison of ionic concentration, organic solute accumulation and osmotic adaptation in Kentucky bluegrass and Tall fescue under NaCl stress

Fujiyama

2013

Soil Science and Plant Nutrition

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The need for salt-tolerant turfgrasses in arid and semi-arid regions has increased substantially owing to shortages of fresh water and to soil salinization. We hypothesized that salt tolerance in turfgrasses is achieved by ion regulation and the accumulation of compatible solutes. We investigated changes in ionic concentrations and compatible solutes in Kentucky bluegrass (Poa pratensis L.; a salt-sensitive species) and Tall fescue (Festuca arundinacea Schreb.; a moderately salt-tolerant species) in response to elevated sodium chloride (NaCl) concentration. Sodium (Na þ ) and chloride (Cl -) concentrations in shoots and roots increased with increasing salinity in both turfgrasses. Kentucky bluegrass accumulated more Na þ and Cl À under NaCl stress than did Tall fescue. NaCl stress induced more significantly mineral nutrient imbalances in Kentucky bluegrass than in Tall fescue. The concentrations of potassium (K þ ), calcium (Ca 2þ ), magnesium (Mg 2þ ) and nitrate ðNO À 3 Þ in Tall fescue were much less affected than those in Kentucky bluegrass. The proline concentration increased significantly in both grasses with increasing salinity. The total soluble sugar (TSS) concentration of Tall fescue was significantly higher than that of Kentucky bluegrass under elevated NaCl concentration. Inorganic ions, especially Na þ , were more important in osmoregulation for Kentucky bluegrass and Tall fescue to adapt to NaCl stress. The estimated contribution of K þ to osmotic potential (É s ) decreased with increasing salinity, and it was higher in Tall fescue than in Kentucky bluegrass. The estimated contribution of TSS to É s was higher in Tall fescue than in Kentucky bluegrass under NaCl stress. These results indicate that Tall fescue tolerates salt better by inhibiting the accumulation of Na þ and Cl À , which helps to maintain ion balance, and by accumulating sugars, which decrease the osmotic potential of the cytoplasm.

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“…Fortmeier and Schubert (1995) compared the effect of NaCl and Na 2 SO 4 on cotton growth and concluded that the toxicity of salts on cotton was due to Na, not due to C1, or combination of Na and C1. The accumulation of Na may result in decreased uptake of K, and Ca (Rathert 1983;Saqib et al 2000;Lee et al 2007). Our experimental results showed that the Na concentration of the cotton roots, leaves and stems increased with the soil salinity, the uptake of K decreased with soil salinity, while the uptake of Ca increased with soil salinity.…”

Section: Discussionmentioning

confidence: 99%

Effects of salinity and nitrogen on cotton growth in arid environment

et al. 2009

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The influences of different N fertilization rates and soil salinity levels on the growth and nitrogen uptake of cotton was evaluated with a pot experiment under greenhouse conditions. Results showed that cotton growth measured as plant height was significantly affected by the soil salinity and Nsalinity interaction, but not by N alone. Cotton was more sensitive to salinity during the emergence and early growth stages than the later developmental stages. At low to moderate soil salinity, the growth inhibition could be alleviated by fertilizer application. Soil salinity was a dominated factor affecting cotton's above-ground dry mass and root development. Dry mass of seed was reduced by 22%, 52%, and 84% respectively, when the soil salinity level increased from control level of 2.4 dS m −1 to 7.7 dS m −1 , 12.5 dS m −1 and to 17.1 dS m −1 , respectively. N uptake increased with N fertilization at adequate rates at both low and medium soil salinities but was not influenced by over N fertilization. At higher salinities, N uptake was independent of N rates and mainly influenced by soil salinity. The uptake of K decreased with soil salinity. The concentration of Na, Cl and Ca in plant tissues increased with soil salinity with highest concentrations in the cotton leaf.

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Nutrient Uptake Responses and Inorganic Ion Contribution to Solute Potential under Salinity Stress in Halophytic Seashore Paspalums

Cited by 28 publications

References 38 publications

Silicon enhances photochemical efficiency and adjusts mineral nutrient absorption in Magnaporthe oryzae infected rice plants

Silicon enhances photochemical efficiency and adjusts mineral nutrient absorption in Magnaporthe oryzae infected rice plants

Comparison of ionic concentration, organic solute accumulation and osmotic adaptation in Kentucky bluegrass and Tall fescue under NaCl stress

Effects of salinity and nitrogen on cotton growth in arid environment

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