Impairment of maize seedling photosynthesis caused by a combination of potassium deficiency and salt stress

Qu, Chunxiang; Liu, Chao; Gong, Xiaolan; Li, Chunxiao; Hong, Mengmeng; Wang, Ling; Hong, Fashui

doi:10.1016/j.envexpbot.2011.08.019

Cited by 129 publications

(108 citation statements)

References 72 publications

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“…Negative effects of salinity on potassium, calcium, and magnesium uptake are further aggravated under potassium deficiency. Potassium and magnesium contents in both leaves and roots of maize plants decreased drastically under both potassium-deficient and saline conditions, but the reduction was much higher under combined stresses than individual salt stress or potassium deficiency (Qu et al 2012). Moreover, salt stress significantly increased both sodium and chloride contents in maize leaves and roots and potassium deficiency further aggravated sodium and chloride accretion in leaves and roots of maize.…”

Section: Mineral Uptake and Assimilationmentioning

confidence: 94%

“…However, potassium, sodium, magnesium, and chloride contents in leaves were higher than those in roots, but calcium leaf contents were lower than that in roots. The potassium/sodium ratio in leaves and roots decreased with a greater reduction under combined stresses than individual stresses (Qu et al 2012). …”

Section: Mineral Uptake and Assimilationmentioning

confidence: 99%

“…Salinity reduces shoot growth by suppressing leaf initiation and expansion, as well as internode growth, and by accelerating leaf abscission (Rios-Gonzalez et al 2002;Akram et al 2010a;Qu et al 2012). Salt stress rapidly reduces leaf growth rate (Munns 1993) due to a reduction in the number of elongating cells and/or the rate of cell elongation (Szalai and Janda 2009).…”

Section: Germination and Plant Growthmentioning

confidence: 99%

“…Generally, salt stress reduces the uptake of nitrogen, potassium, calcium, magnesium, and iron (Karimi et al 2005;Gunes et al 2007;Turan et al 2010;Kaya et al 2010;Shahzad et al 2012;Qu et al 2012;Yasmeen et al 2013).…”

Section: Mineral Uptake and Assimilationmentioning

confidence: 99%

“…Both stomatal and nonstomatal limitations and their combination are associated with salinity-induced reductions in maize photosynthesis (Gong et al 2011). Reduced stomatal conductance, impaired activities of carbon fixation enzymes, reduced photosynthetic pigments, and destruction of photosynthetic apparatus are among the key factors limiting carbon fixation capacity of maize plants under salt stress (Kaya et al 2010;Gong et al 2011;Omoto et al 2012;Qu et al 2012).…”

Section: Light Harvesting and Carbon Fixationmentioning

confidence: 99%

See 4 more Smart Citations

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

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

571

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: Mineral Uptake and Assimilationmentioning

confidence: 94%

Section: Mineral Uptake and Assimilationmentioning

confidence: 99%