Salt sensitivity of corn at various growth stages

Maas, E. V.; Hoffman, G. J.

doi:10.1007/bf00285556

Cited by 148 publications

(74 citation statements)

References 5 publications

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“…This agrees with the statements of other authors that the vegetative development is more affected by salinity than the yield components Willadino et al, 1994). Maas et al (1983) reported that grain yield of corn was not affected by EC i up to 4.6 dS m -1 for cultivars 'Bonanza' and 'Golden Cross Bantam', and Hoffman et al (1983) showed that it was reduced by 14% for each ECs unit increase above 3.7 dS m -1 for cv. 'DeKalb XL75'.…”

Section: Resultsmentioning

confidence: 99%

Growth and yield of corn irrigated with saline water

Blanco

Folegatti²,

Gheyi

et al. 2008

Sci. agric. (Piracicaba, Braz.)

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Corn (Zea mays L.) is an important crop in Brazil and is cultivated in all regions, including the semi-arid area of Brazil, where the occurrence of irrigation water with high concentration of salts is common. Evaluating the growth and yield of the maize hybrid 'AG 6690' irrigated with water of different salinity levels was the objective of this experiment. Sowing was performed in pots with 12 seeds on , as quais foram alcançadas pela adição de NaCl e CaCl 2 na proporção equivalente de 1:1. O peso seco de todas as partes da planta foi reduzido pela salinidade, assim como a evapotranspiração e a eficiência de uso de água. A produção reduziu por 21 e 20% para cada aumento unitário de EC i e EC s (condutividade elétrica da solução do solo) acima dos valores limiares de 1,7 e 4,3 dS m -1 , respectivamente. As plantas foram capazes de manter a área foliar constante sob condições de salinidade moderada. Palavras-chave: Zea mays L., tolerância à salinidade, solução do solo, área foliar, evapotranspiração

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Section: Resultsmentioning

confidence: 99%

Growth and yield of corn irrigated with saline water

Blanco

Folegatti²,

Gheyi

et al. 2008

Sci. agric. (Piracicaba, Braz.)

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“…The effect ofsalt stress on Ca nutrition is particularly interesting since Ca is an important factor in the resistance of plants to salt stress (8,11,12). We have observed that supplemental Ca enhances the salt resistance of corn (data not shown), which is relatively sensitive to salt stress (15). Ca is essential to the selectivity of membrane transport processes (10), a function that LaHaye and Epstein (12) proposed for its role in improving salt tolerance.…”

Section: Andre Lauchlimentioning

confidence: 96%

Salinity Reduces Membrane-Associated Calcium in Corn Root Protoplasts

Lynch¹,

Cramer²,

Läuchli³

1987

Plant Physiol.

140

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Calcium is an important factor in the ability of plants to resist salt stress, possibly because of its role in maintaining membrane integrity. We studied the effects of NaCl stress on membrane-associated Ca in corn root protoplasts (Zea mays L. cv Pioneer 3377) using the fluorescent Ca probe chlorotetracycline (CTC). Protoplasts were isolated from the cortex of primary roots of corn seedlings (Gronwald and Leonard, Plant Physiol 1982 70: 1391-1395. After a 30 minute incubation in 50 micromolar CTC, the protoplasts were exposed to isosmotic treatment solutions containing various concentrations of NaC just before fluorimetric analysis. Increasing NaCl concentrations caused a progressive reduction in net CTC fluorescence, to 50% of control values at 150 mM NaCl. NaCl did not displace CTC from the cells, nor did it directly interfere with Ca-CTC binding. Tests with CsC4, RbCl, KG, LiCI, Na2SO*4 NaNO3, and NaBr indicated that the reduction in CTC fluorescence was not specific to either Na or Cl, but may have been due to increased ionic strength of the treatment solutions. Like CTC fluorescence, root growth of intact corn seedlings was not specifically sensitive to Na, but was inhibited by several monovalent cations in the order Li > Cs >> Rb > Na > K. CTC fluorescence at 100 mM NaCl was restored to unstressed levels by increasing Ca concentrations. Since our salt treatments were isosmotic, we conclude that the ionic component of salt stress displaces Ca from membranes of corn root cells. ANDRE LAUCHLIUniversity ofCalifornia, Davis, California 95616 orescent Ca probe CTC2 to measure membrane-associated Ca.

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“…It is an important C 4 plant from the Poaceae family and is moderately sensitive to salt stress ( Fig. 1; Maas and Hoffman 1977;Maas et al 1983;Chinnusamy et al 2005); nonetheless, wide intraspecific genetic variation for salt resistance exists in maize (Mansour et al 2005). …”

Section: Introductionmentioning

confidence: 99%

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

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

564

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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Salt sensitivity of corn at various growth stages

Cited by 148 publications

References 5 publications

Growth and yield of corn irrigated with saline water

Growth and yield of corn irrigated with saline water

Salinity Reduces Membrane-Associated Calcium in Corn Root Protoplasts

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

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