Proline antioxidant role in the common ice plant subjected to salinity and paraquat treatment inducing oxidative stress

Shevyakova, N. I.; Bakulina, E. A.; Кузнецов, Вл. В.

doi:10.1134/s1021443709050124

Cited by 72 publications

(33 citation statements)

References 22 publications

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“…The activity of APX activity increased to a similar extent in PK and KDML105 ( Figure 4C and 4D). Similar to our observation, external supply of Pro to plants under stress conditions was reported to suppress SOD activity in common ice plant under paraquat-induced stress (Shevyakova et al 2009). Huang et al (2009) demonstrated that exogenous Pro also enhanced POX activity in salt-stressed cucumber (a salt-sensitive cultivar).…”

Section: Resultssupporting

confidence: 90%

Effects of exogenous proline and trehalose on physiological responses in rice seedlings during salt-stress and after recovery

Nounjan¹,

Theerakulpisut²

2012

Plant Soil Environ.

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Two osmoprotectants (proline -Pro; trehalose -Tre) were exogenously supplied to seedlings of rice cvs. Pokkali (PK -salt-tolerant) and Khao Dawk Mali 105 (KDML105 -salt-sensitive) to investigate their effects on plants exposed to 200 mmol/L NaCl for 6 days and 5 days after recovery from stress. The reduction of growth, increase in Na + to K + ratio, high level of hydrogen peroxide (H 2 O 2 ) content, enhanced activity of antioxidant enzymes (superoxide dismutase -SOD, peroxidase -POX, catalase -CAT and ascorbate peroxidase -APX) were observed in both rice cultivars under NaCl treatments. Exogenous Pro and Tre supplement to NaCl-stressed plants did not mitigate the reduction of growth during salt-stress. Nevertheless, during recovery plants previously supplied with Tre showed markedly higher percentage of growth recovery than those treated with NaCl alone or supplied with Pro. The beneficial effect of Tre on growth recovery was clearly demonstrated in KDML105 in which growth enhancement was related to reduction in Na + to K + ratio. Exogenous Pro was able to reduce H 2 O 2 in both cultivars during salt stress whereas Tre could reduce it only in KDML105. Exogenous Tre did not enhance any antioxidant enzymes during stress but enhanced APX activity in KDML105 during recovery. Exogenous Pro enhanced the activity of APX in PK, and POX, CAT and APX in KDML105 during both stress and recovery period.

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Section: Resultssupporting

confidence: 90%

Effects of exogenous proline and trehalose on physiological responses in rice seedlings during salt-stress and after recovery

Nounjan¹,

Theerakulpisut²

2012

Plant Soil Environ.

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“…These observations are similar to those of Shaddad (1990) who reported improvement in pigment content (chlorophyll and carotenoids) in salt-stressed barley seedlings growing in the presence of proline. Similarly, Shevyakova et al (2010) also observed increase in chlorophyll content with proline application to ice (Mesembryanthemum crystallinum) plants subjected to salt stress. These responses indicate that the elevated proline content was able to confer stability to membranes of the cell and those of organelles such as chloroplast, as well as to respiratory metabolism.…”

Section: Exogenous Application Of Prolinementioning

confidence: 70%

Proline induces heat tolerance in chickpea (Cicer arietinum L.) plants by protecting vital enzymes of carbon and antioxidative metabolism

Kaushal

Gupta

Bhandhari

et al. 2011

Physiol Mol Biol Plants

163

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Chickpea is a heat sensitive crop hence its potential yield is considerably reduced under high temperatures exceeding 35°C. In the present study, we evaluated the efficacy of proline in countering the damage caused by heat stress to growth and to enzymes of carbon and antioxidative metabolism in chickpea. The chickpea seeds were raised without (control) and with proline (10 μM) at temperatures of 30/25°C, 35/30°C, 40/35°C and 45/40°C as day/ night (12 h/12 h) in a growth chamber. The shoot and root length at 40/35°C decreased by 46 and 37 %, respectively over control while at 45/40°C, a decrease of 63 and 47 %, respectively over control was observed. In the plants growing in the presence of 10 μM proline at 40/35°C and 45/40°C, the shoot length showed improvement of 32 and 53 %, respectively over untreated plants, while the root growth was improved by 22 and 26 %, respectively. The stress injury (as membrane damage) increased with elevation of temperatures while cellular respiration, chlorophyll content and relative leaf water content reduced as the temperature increased to 45/40°C. The endogenous proline was elevated to 46 μmol g −1 dw at 40/35°C but declined to 19 μmol g −1 dw in plants growing at 45/40°C that was associated with considerable inhibition of growth at this temperature. The oxidative damage measured as malondialdehyde and hydrogen peroxide content increased manifolds in heat stressed plants coupled with inhibition in the activities of enzymatic (superoxide dismutase, catalase, ascorbate peroxidase, glutathione reductase) and levels of non-enzymatic (ascorbic acid, glutathione, proline) antioxidants. The enzymes associated with carbon fixation (RUBISCO), sucrose synthesis (sucrose phosphate synthase) and sucrose hydrolysis (invertase) were strongly inhibited at 45/40°C. The plants growing in the presence of proline accumulated proline up to 63 μmol g −1 dw and showed less injury to membranes, had improved content of chlorophyll and water, especially at 45/40°C. Additionally, the oxidative injury was significantly reduced coupled with elevated levels of enzymatic and non-enzymatic antioxidants. A significant improvement was also noticed in the activities of enzymes of carbon metabolism in proline-treated plants. We report here that proline imparts partial heat tolerance to chickpea's growth by reducing the cellular injury and protection of some vital enzymes related to carbon and oxidative metabolism and exogenous application of proline appears to have a countering effect against elevated high temperatures on chickpea.

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“…Exogenous addition of proline to nutrient medium drastically decreased the oxidative damage to membranes caused by salinity in Mesembryanthemum crystallinum L. thus resulting in reduced lipid peroxidation rate but increased the chlorophyll content in the leaves of salt stressed plants. 100 …”

Section: Effect Of Exogenous Proline On Plants Exposed To Salinity Stmentioning

confidence: 99%

Role of proline under changing environments

Hayat

Alyemeni³

et al. 2012

Plant Signaling & Behavior

2,207

1,149

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Proline antioxidant role in the common ice plant subjected to salinity and paraquat treatment inducing oxidative stress

Cited by 72 publications

References 22 publications

Effects of exogenous proline and trehalose on physiological responses in rice seedlings during salt-stress and after recovery

Effects of exogenous proline and trehalose on physiological responses in rice seedlings during salt-stress and after recovery

Proline induces heat tolerance in chickpea (Cicer arietinum L.) plants by protecting vital enzymes of carbon and antioxidative metabolism

Role of proline under changing environments

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