The effect of salinity on photosynthetic activity in potassium-deficient barley species

Degl’Innocenti, Elena; Hafsi, Chokri; Guidi, Lucia; Navari-Izzo, F.

doi:10.1016/j.jplph.2009.06.013

Cited by 114 publications

(76 citation statements)

References 42 publications

(45 reference statements)

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“…Excessive accumulation of Na + in leaves has been considered highly harmful for normal metabolism of plant, and tolerant genotype has the capacity of successful salt exclusion [13,36]. Salt stress also impairs K + uptake of plants, and it has been suggested that K + deficiency might be a contributing factor to salt-induced growth inhibition through induction of oxidative stress and related cell damage [57,61,62]. The K + : Na + ratio has been used as a discriminating factor between tolerant and sensitive genotypes with greater capacity of former to block or reduce the uptake or exclude the excess amount of Na + and associated increase in K + content [36].…”

Section: ] and Phaseolus Aureusmentioning

confidence: 99%

Growth Responses and Leaf Antioxidant Metabolism of Grass Pea (Lathyrus sativus L.) Genotypes under Salinity Stress

Talukdar

2013

ISRN Agronomy

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Response of six improved grass pea genotypes to prolonged salinity stress was investigated on seedlings grown in pot experiment using 150 mM NaCl up to 60 days of growth after commencement of treatment (DAC). NaCl exposure significantly reduced growth potential of varieties PUSA-90-2 and WBK-CB-14, but no such effect was observed in varieties B1, BioL-212 and in two mutant lines LR3 and LR4. A time-bound measurement at 15, 30 and 60 DAC revealed significant reduction in plant dry matter production, orchestrated through abnormally low capacity of leaf photosynthesis accompanied by low K + /Na + ratio and onset of oxidative stress in all six genotypes at 15 DAC and the extension of the phenomena in PUSA-90-2 and WBK-CB-14 to 60 DAC. High superoxide dismutase (SOD) activity coupled with low ascorbate redox and declining ascorbate peroxidase (APX) and catalases (CAT) levels led to abnormal rise in H 2 O 2 content at reproductive stage (30 DAC) in the latter two genotypes, consequently, resulting in NaClinduced oxidative damage. H 2 O 2 level in the rest of the four genotypes was modulated in a controlled way by balanced action of SOD, APX and CAT, preventing oxidative damage even under prolonged NaCl-exposure. Enzyme isoforms were involved in regulation of foliar H 2 O 2 -metabolism, which was critical in determining As tolerance of grass pea genotypes.

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Section: ] and Phaseolus Aureusmentioning

confidence: 99%

Growth Responses and Leaf Antioxidant Metabolism of Grass Pea (Lathyrus sativus L.) Genotypes under Salinity Stress

Talukdar

2013

ISRN Agronomy

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“…Photosynthesis, which is one of the primary metabolic processes in plant growth and production, is adversely affected by salinity in various ways, such as the inhibition of CO 2 intake with stomatal closure (Degl'Innocenti et al, 2009), the reduction of photosynthetic pigment amount (Qados, 2011), and damage to photosynthetic structures [photosystems I and II (PSI and PSII), electron transport proteins etc.] (Sudhir et al, 2005 ).…”

Section: +2mentioning

confidence: 99%

Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars

Erdal¹,

Çakirlar²

2014

Turk J Biol

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This study was conducted to determine the tolerance of safflower (Carthamus tinctorius L.) cultivars (Dinçer, Remzibey-05, and Yenice) against salt stress based on some physiological and biochemical parameters at the vegetative stage. Eighteen-day-old plants were subjected to salt stress [0 (control), 75, 150, 225, and 300 mM NaCl concentrations] for 12 days, which led to a significant decrease in growth parameters (stem growth, fresh weight, and relative water content) and the photosynthetic pigment contents of the safflower cultivars. The photochemical activities of photosystem II of the cultivars were negatively affected by salinity, especially at the highest concentration (300 mM). Salt stress decreased K + content and K + /Na + ratio while it increased Na + content. Malondialdehyde and free proline contents in the leaves of cultivars increased gradually in proportion to the increase of NaCl concentration. Analysis of antioxidant enzyme activities showed that these enzymes responded differently to the NaCl concentrations. Dinçer, with higher antioxidant enzyme activities, had a more effective response than the other cultivars. Considering growth and biochemical and chlorophyll fluorescence parameters with the endogenous defense system, Dinçer had a higher withstanding capacity against salinity than the other cultivars.

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“…High pH and excessive Na + in sodic-alkaline soil medium result in serious K + deprivation in living plant cells (Liu et al, 2013). Several studies have reported that a combination of salinity and K + starvation had a greater effect on the growth and productivity of barley and maize (Degl ' Innocenti et al, 2009;Hafsi et al, 2010;Gong et al, 2011;Qu et al, 2012). This study showed that the lowest biomass production and chlorosis with Alkalinity+0 mM K treatment, which indicates that the absence of K + partially intensified the effect of alkalinity on reducing the growth of Swiss chard.…”

Section: Discussionmentioning

confidence: 53%

Beneficial Effects of Potassium on Growth, Water Relations, Mineral Accumulation and Oxidative Damage of Beta vulgaris in Sodic-alkaline Condition

Liu¹,

El‐Shemy²,

Saneoka³

2017

IJAB

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Potassium (K + ) plays a vital role for plant growth and therefore the amount of K + seems to be a key of plant development. Therefore, this study investigated whether the sodic-alkalinity tolerance of Swiss chard (Beta vulgaris L. subsp. cicla) could be increased, via greater water uptake, higher concentrations of mineral elements and higher antioxidant enzyme activities in sodic-alkaline stress conditions with K + supplementation. Forty seven day old uniform seedlings were pre-treated in hydroponic medium with or without K + for 7 days, and then treated in non-alkaline or alkaline conditions for 9 days. The absence of K + somewhat intensified the effect of alkalinity on reducing the growth of Swiss chard, the total dry weight (DW) was reduced by 34% in plants treated in sodic-alkaline conditions without K + when compared with plants with K + . Relative water content (RWC) of leaves was increased by 10% by K + supplementation in sodic-alkaline conditions. Additionally, the osmotic adjustment was retorted; the contents of K , and the activities of catalase, guaiacol peroxidase, and glutathione reductase were increased. On other hand, K + supplementation in sodic-alkaline conditions helped to maintain guaiacol peroxidase activity similar to that of control plants, and reduced malondialdehyde content when compared with plants treated in sodic-alkaline conditions without K + . In conclusion, the K + supplementation resulted in favorable changes in plants with higher micronutrient contents and a reduction of oxidative damage induced by sodicalkalinity in Swiss chard.

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The effect of salinity on photosynthetic activity in potassium-deficient barley species

Cited by 114 publications

References 42 publications

Growth Responses and Leaf Antioxidant Metabolism of Grass Pea (Lathyrus sativus L.) Genotypes under Salinity Stress

Growth Responses and Leaf Antioxidant Metabolism of Grass Pea (Lathyrus sativus L.) Genotypes under Salinity Stress

Impact of salt stress on photosystem II efficiency and antioxidant enzyme activities of safflower (Carthamus tinctorius L.) cultivars

Beneficial Effects of Potassium on Growth, Water Relations, Mineral Accumulation and Oxidative Damage of Beta vulgaris in Sodic-alkaline Condition

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