Polyamine oxidase activity contributes to sustain maize leaf elongation under saline stress

Rodríguez, Andrés Alberto; Maiale, Santiago Javier; Menéndez, Ana; Ruíz, Oscar Adolfo

doi:10.1093/jxb/erp256

Cited by 108 publications

(62 citation statements)

References 83 publications

(118 reference statements)

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“…Both DAO and PAO are localized to the cytoplasm and cell wall and are involved in production of the hydrogen peroxide required for cell wall stiffening (Cona et al, 2003; (Figure 1). These enzymes seem to contribute to changes in growth during salt stress since increased PAO accumulation in the expansion zone of maize leaves enhanced both ROS accumulation and elongation (Rodríguez et al, 2009;Shoresh et al, 2011). Moreover, high salt (400 mM NaCl) or ROS application induces DAO activity in the leaves and roots of the halophyte Mesembryanthemum crystallinum further implicating that these enzymes play a role in salt stress (Shevyakova et al, 2006).…”

Section: Polyamines: One Of the Prominent Regulators In Ros Homeostasmentioning

confidence: 98%

Polyamines as redox homeostasis regulators during salt stress in plants

Saha

Brauer

Sengupta

et al. 2015

Front. Environ. Sci.

176

105

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The balance between accumulation of stress-induced polyamines and reactive oxygen species (ROS) is arguably a critical factor in plant tolerance to salt stress. Polyamines are compounds, which accumulate in plants under salt stress and help maintain cellular ROS homeostasis. In this review we first outline the role of polyamines in mediating salt stress responses through their modulation of redox homeostasis. The two proposed roles of polyamines in regulating ROS-as antioxidative molecules and source of ROS synthesis-are discussed and exemplified with recent studies. Second, the proposed function of polyamines as modulators of ion transport is discussed in the context of plant salt stress. Finally, we highlight the apparent connection between polyamine accumulation and programmed cell death induction during stress. Thus, polyamines have a complex functional role in regulating cellular signaling and metabolism during stress. By focusing future efforts on how polyamine accumulation and turnover is regulated, research in this area may provide novel targets for developing stress tolerance.

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Section: Polyamines: One Of the Prominent Regulators In Ros Homeostasmentioning

confidence: 98%

Polyamines as redox homeostasis regulators during salt stress in plants

Saha

Brauer

Sengupta

et al. 2015

Front. Environ. Sci.

176

105

View full text Add to dashboard Cite

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“…For instance, salt stress increased apoplastic spermine and spermidine levels, mainly in the leaf blade elongation zone. Polyamine oxidase activity provides significant production of reactive oxygen species in the apoplast, which contributes to 25-30 % of maize leaf blade elongation (Rodríguez et al 2009). …”

Section: Apoplastic Acidificationmentioning

confidence: 99%

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

Farooq

Hussain

Wakeel

et al. 2015

Agron. Sustain. Dev.

590

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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“…In another work, Tisi et al (2012) shown to be associated with biotic or abiotic stress response. Rodríguez et al (2009) reported that under saline stress, oxidation of higher PAs by PAOs helped to sustain leaf elongation. H 2 O 2 produced through the PA oxidation has been also reported to be involved in hypersensitivity reaction (HR) that can render plants more tolerant to bacterial pathogen (Fu et al, 2011).…”

Section: Introductionmentioning

confidence: 99%