Hydrogen peroxide pre-treatment induces salt-stress acclimation in maize plants

Neto, André Dias de Azevedo; Prisco, José Tarquı́nio; Enéas-Filho, Joaquim; Medeiros, Jand Venes R.; Gomes-Filho, Enéas

doi:10.1016/j.jplph.2005.01.007

Cited by 219 publications

(95 citation statements)

References 42 publications

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“…Thus, higher level of salt stress can amplify the intensity of H 2 O 2 . It has been suggested that H 2 O 2 accumulation may be a pivotal signaling event that occurs during plant acclimation to both biotic and abiotic stresses (Smirnoff 1993;Prasad et al 1994;de Azevedo Neto et al 2005). We found that exogenous application of H 2 O 2 increased the capacity of the AOX pathway and stimulated the expression of AOX1a (Fig.…”

Section: Discussionmentioning

confidence: 56%

Salt stress-induced expression of rice AOX1a is mediated through an accumulation of hydrogen peroxide

Feng

Wang

et al. 2010

Biologia

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Treatment with 300 mM NaCl increased the capacity of the alternative respiratory pathway and induced the expression of AOX1a of the leaves of rice (Oryza sativa L.) seedlings. A significant increase in the content of hydrogen peroxide (H2O2) was observed in rice leaves treated with 300 mM NaCl. However, NaCl at 150 mM did not significantly affect the capacity of the alternative respiratory pathway, the content of H2O2, and the transcript level of AOX1a. Exogenous application of H2O2 enhanced the levels of the capacity of the alternative respiratory pathway and AOX1a expression. The accumulation of H2O2 in rice leaves in response to 300 mM NaCl was inhibited by the pretreatment with dimethylthiourea (DMTU, scavenger of H2O2). This treatment also suppressed the induction of AOX1a expression and the increase in the capacity of the alternative respiratory pathway under 300 mM NaCl stress. Moreover, the salt-stressed (300 mM NaCl) seedlings pretreated with 1 mM salicylhydroxamic acid (SHAM, a special inhibitor of alternative oxidase) had higher level of H2O2 production than the seedlings either subjected to 300 mM NaCl stress or SHAM treatment alone did. These observations suggest that the expression of AOX1a in response to higher salt stress is mediated through an accumulation of H2O2 and alternative oxidase could play a role in antioxidant protection under the condition of higher salt stress.

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Section: Discussionmentioning

confidence: 56%

Salt stress-induced expression of rice AOX1a is mediated through an accumulation of hydrogen peroxide

Feng

Wang

et al. 2010

Biologia

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“…Compared to the activity in the chilling treatment group, SOD activity increased in the leaves of ABA + chilling plants, suggesting that the plants sprayed with ABA had better O 2--scavenging capability under chilling stress. Chilling tolerance was directly related to the increase in SOD activity (de Azevedo Neto et al, 2005).…”

Section: Effect Of Aba On Antioxidant Enzyme Activities In Pepper Leamentioning

confidence: 97%

Exogenous abscisic acid increases antioxidant enzymes and related gene expression in pepper (Capsicum annuum) leaves subjected to chilling stress

Guo¹,

Chen²,

Gong³

et al. 2012

Genet. Mol. Res.

114

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ABSTRACT. To elucidate how physiological and biochemical mechanisms of chilling stress are regulated by abscisic acid (ABA) pretreatment, pepper variety (cv. 'P70') seedlings were pretreated with 0.57 mM ABA for 72 h and then subjected to chilling stress at 10°/6°C (day/night). Chilling stress caused severe necrotic lesions on the leaves and increased malondialdehyde and H 2 O 2 levels. Activities of monodehydroascorbate reductase (DHAR), dehydroascorbate reductase, glutathione reductase, guaiacol peroxidase, ascorbate peroxidase, ascorbate, and glutathione increased due to chilling stress during the 72 h, while superoxide dismutase and catalase activities decreased during 24 h, suggesting that chilling stress activates the AsA-GSH cycle under catalase deactivation in pepper leaves. ABA pretreatment induced significant increases in the above-mentioned enzyme activities and progressive decreases in ascorbate and glutathione levels. On the other hand, ABA-pretreated seedlings under chilling stress increased superoxide dismutase and guaiacol peroxidase activities and lowered concentrations of other antioxidants compared with untreated chilling-stressed plants. These seedlings showed concomitant decreases in foliage damage symptoms, and levels of malondialdehyde and H 2 O 2 . Induction of Mn-SOD and POD was observed in chilling-stressed plants treated with ABA. The expression of DHAR1 and DHAR2 was altered by chilling stress, but it was higher in the presence than in the absence of ABA at 24 h. Overall, the results indicate that exogenous application of ABA increases tolerance of plants to chilling-induced oxidative damage, mainly by enhancing superoxide dismutase and guaiacol peroxidase activities and related gene expression.

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“…This was evidenced by plant growth, lipid peroxidation, and antioxidative enzyme measurements. In both leaves and roots, the variations in lipid peroxidation and antioxidative enzyme (superoxide dismutase, ascorbate peroxidase, guaiacol peroxidase, glutathione reductase, and catalase) activities of both acclimated and unacclimated plants suggest that differences in antioxidative enzyme activities may, at least in part, explain the increased resistance of acclimated plants to salt stress and that hydrogen peroxide metabolism is involved as a signal in the process of maize salt acclimation (de Azevedo Neto et al 2005). In maize, exogenously applied glycine betaine improved growth, leaf water content, net photosynthesis, and the apparent quantum yield of photosynthesis in salt-stressed plants (Yang and Lu 2005).…”

Section: Bacillus Megateriummentioning

confidence: 99%

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

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

587

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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Hydrogen peroxide pre-treatment induces salt-stress acclimation in maize plants

Cited by 219 publications

References 42 publications

Salt stress-induced expression of rice AOX1a is mediated through an accumulation of hydrogen peroxide

Salt stress-induced expression of rice AOX1a is mediated through an accumulation of hydrogen peroxide

Exogenous abscisic acid increases antioxidant enzymes and related gene expression in pepper (Capsicum annuum) leaves subjected to chilling stress

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

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