Na+ accumulation in shoot is related to water transport in K+-starved sunflower plants but not in plants with a normal K+ status

Quintero, José M.; Fournier, José M.; Benlloch, M.

doi:10.1016/j.jplph.2005.10.010

Cited by 51 publications

(28 citation statements)

References 34 publications

(50 reference statements)

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“…Osmotic stress is linked to ion accumulation in the soil solution, whereas nutritional imbalance and specific ion effects are connected to ion buildup, mainly sodium and chloride, to toxic levels which interferes with the availability of other essential elements such as calcium and potassium (El-Bassiouny and Bekheta 2001;Munns et al 2006;Hussain et al 2013). Toxic levels of sodium in plant organs damage biological membranes and subcellular organelles, reducing growth and causing abnormal development before plant mortality (Davenport et al 2005;Quintero et al 2007). Several physiological processes such as photosynthesis, respiration, starch metabolism, and nitrogen fixation are also affected under saline conditions leading to losses in crop productivity.…”

Section: Introductionmentioning

confidence: 99%

Salt stress in maize: effects, resistance mechanisms, and management. A review

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

590

383

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Maize is grown under a wide spectrum of soil and climatic conditions. Maize is moderately sensitive to salt stress; therefore, soil salinity is a serious threat to its production worldwide. Understanding maize response to salt stress and resistance mechanisms and overviewing management options may help to devise strategies for improved maize performance in saline environments. Here, we reviewed the effects, resistance mechanisms, and management of salt stress in maize. Our main conclusions are as follows: (1) germination and stand establishment are more sensitive to salt stress than later developmental stages. (2) High rhizosphere sodium and chloride decrease plant uptake of nitrogen, potassium, calcium, magnesium, and iron. (3) Reduced grain weight and number are responsible for low grain yield in maize under salt stress. Sink limitations and reduced acid invertase activity in developing grains is responsible for poor kernel setting under salt stress. (4) Exclusion of excessive sodium or its compartmentation into vacuoles is an important adaptive strategy for maize under salt stress. (5) Apoplastic acidification, required for cell wall extensibility, is an important indicator of salt resistance, but not essential for better maize growth under salt stress. (6) Upregulation of antioxidant defense genes and β-expansin proteins is important for salt resistance in maize. (7) Arbuscular mycorrhizal fungi improve salt resistance in maize due to better plant nutrient availability. (8) Seed priming is an effective approach for improving maize germination under salt stress. (9) Integration of screening, breeding and ion homeostasis mechanisms into a functional paradigm for the whole plant may help to enhance salt resistance in maize.

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Section: Introductionmentioning

confidence: 99%

Salt stress in maize: effects, resistance mechanisms, and management. A review

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

590

383

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“…Although Na is not an essential element for plant growth, a high Na concentration was found in sunflower but not in corn, while there was a reverse relationship was observed in K concentration. Quintero et al (2007) and Slama et al (2008) ) were also higher in sunflower. We measured concentrations of K , Na , Mg 2 , Ca 2 , Cl -, and SO4 2-in the leaves, stems, and roots of sunflower and corn ( Table 2).…”

Section: Water and Ions Transportmentioning

confidence: 85%

Absorption and Transport of Water and Ions in Corn and Sunflower Plants Grown Under Saline Conditions

Yasutake¹,

Ishikawa²,

Sago³

et al. 2009

J. Agric. Meteorol.

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In order to analyze absorption and transport of water and ions in plants affecting the salinization in the root zone through physical and physiological processes, we measured water and ion uptake by roots, transpiration rate, leaf conductance, and ion concentrations in root xylem sap and other plant tissues of corn and sunflower grown under saline conditions using a nutrient film technique system. The rate of root water uptake was lower in corn than in sunflower, where the daytime stomatal closure in response to the excessive water stress induced by the saline solution was occurred in corn but not in sunflower. NO3-, PO4 3-and K were highly concentrated in the xylem sap as a result of the active and selective uptake of nutrients by roots of both corn and sunflower. Na , which is not an essential element for plant growth, was not highly concentrated in the xylem sap or plant tissues of corn because corn exhibited a poor Na absorption and transportation ability. On the other hand, sunflower had a greater ability to absorb water, Na , Mg 2 , Ca 2 , Cl -, and SO4 2-, and to transport these ions from the roots to the shoot. These differences in absorption and transport of water and ions indicate that sunflower is more salt tolerant than corn. The effects of these absorption and transport characteristics on plant growth and soil salinity should be taken into account for sustainable and effective plant production in salinized crop fields.

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“…We think that the decrease in water imbibition rate with increasing salt concentration could be caused by the reduction of seed weights, similar to our study. On the other hand, when sodium, which is a specific ion, reaches toxic levels in soil solution and plant structure, biological membranes and subcellular organelles get damaged, plant growth reduces, and abnormal growth is observed (Quintero et al, 2007). Various plant growth regulators and osmoprotectans are used to alleviate the detrimental effects of salt stress on plants.…”

Section: Discussionmentioning

confidence: 99%

Role of Exogenous Folic Acid in Alleviation of Morphological and Anatomical Inhibition on Salinity-Induced Stress in Barley

Kılıç

Tuğba

2016

Italian Journal of Agronomy

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Soil salinity is a serious threat to agricultural ecological environment and agriculture sustainability. Ever increasing salinity negatively affects processes such as plant growth and development, ultimately causing diminished economic yield and quality of production, and it might cause a worldwide famine in the future. Thus, helping plants adapt to saline soils and increasing their yield and quality is a must. Our study focused on the enhancing role of exogenously applied folic acid (FA) in mitigation of toxicity caused by salt (NaCl). Barley seeds were pre-treated with 50 mM FA for 24 h and then exposed to salt. Morphological and anatomical changes in seed germination and seedling growth stages were compared between different treatments of salt in laboratory conditions. Adverse effects of salt in both germination and seedling growth stages depended on the concentration of salt treatment (0.0, 0.25, 0.275, 0.30, 0.325 and 0.35 M). It was shown that the application of FA effectively alleviated the salt-induced inhibition, and reduced the negative effects of salt on germination (germination index and vigour index), seedling growth (radicle and coleoptile lengths, fresh weight) and leaf (stomata and epidermis number, stomatal index, stomata sizes of adaxial and abaxial surfaces) parameters. Moreover, FA elevated all examined parameters of barley also under non-stress conditions. Especially, germination and vigour indices were significantly higher than the control. Our results suggest that exogenous FA is involved in the resistance of barley to salt-stress.

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Na+ accumulation in shoot is related to water transport in K+-starved sunflower plants but not in plants with a normal K+ status

Cited by 51 publications

References 34 publications

Salt stress in maize: effects, resistance mechanisms, and management. A review

Salt stress in maize: effects, resistance mechanisms, and management. A review

Absorption and Transport of Water and Ions in Corn and Sunflower Plants Grown Under Saline Conditions

Role of Exogenous Folic Acid in Alleviation of Morphological and Anatomical Inhibition on Salinity-Induced Stress in Barley

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