Evaluating contribution of ionic, osmotic and oxidative stress components towards salinity tolerance in barley

Adem, Getnet Dino; Roy, Stuart J.; Zhou, Meixue; Bowman, John P.; Shabala, Sergey

doi:10.1186/1471-2229-14-113

Cited by 166 publications

(90 citation statements)

References 71 publications

(127 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar results were obtained for the Na + /H + antiporter gene NHX2. This is in accordance with earlier findings that NHXs could not be used to predict salinity stress tolerance in barley plants (Adem et al, 2014). In contrast to these genes, the expression level of another stress-related gene, WALI6 showed a marked increase not only in salt-stressed, but also in salt-acclimated plants.…”

Section: Discussionsupporting

confidence: 92%

Salt acclimation processes in wheat

Janda

Darkó

Shehata

et al. 2016

Plant Physiology and Biochemistry

View full text Add to dashboard Cite

Young wheat plants (Triticum aestivum L. cv. Mv Béres) were exposed to 0 or 25 mM NaCl for 11 days (salt acclimation). Thereafter the plants were irrigated with 500 mM NaCl for 5 days (salt stress). Irrigating the plants with a low concentration of NaCl successfully led to a reduction in chlorotic symptoms and in the impairment of the photosynthetic processes when the plants were exposed to subsequent high-dose salt treatment. After exposure to a high concentration of NaCl there was no difference in leaf Na content between the salt-acclimated and non-acclimated plants, indicating that salt acclimation did not significantly modify Na transport to the shoots. While the polyamine level was lower in salt-treated plants than in the 2 control, salt acclimation led to increased osmotic potential in the leaves. Similarly, the activities of certain antioxidant enzymes, namely glutathione reductase, catalase and ascorbate peroxidase, were significantly higher in salt-acclimated plants. The results also suggest that while SOS1, SOS2 or NHX2 do not play a decisive role in the salt acclimation processes in young wheat plants; another stress-related gene, WALI6, may contribute to the success of the salt acclimation processes. The present study suggested that the responses of wheat plants to acclimation with low level of salt and to treatment with high doses of salt may be fundamentally different.

show abstract

Section: Discussionsupporting

confidence: 92%

Salt acclimation processes in wheat

Janda

Darkó

Shehata

et al. 2016

Plant Physiology and Biochemistry

View full text Add to dashboard Cite

show abstract

“…A study with three barley cultivars with contrasting salt tolerance looked at expression of five candidate genes mentioned above that are considered to be involved in cellular tissue tolerance (Adem et al 2014). The study confirmed that tissue tolerance was a dominating component of the overall plant responses to salinity.…”

Section: Genes Involved In Tissue Tolerance -Can These Provide a Molementioning

confidence: 80%

“…The NHX1 proteins may operate principally as K + rather than Na + exchangers (Bassil et al 2011;Barragan et al 2012), with their major role being the regulation of cytosolic K + or pH. Furthermore, transcriptional changes in NHX1 and NHX2 expression were not correlated with salt tolerance in three barley cultivars (Adem et al 2014), and overexpression of AtNHX1 in barley did not improve its salt tolerance (Adem et al 2015). This may be because these proteins are regulated post-translationally.…”

Section: Genes Involved In Tissue Tolerance -Can These Provide a Molementioning

confidence: 99%

Tissue tolerance: an essential but elusive trait for salt-tolerant crops

Munns

James

Gilliham

et al. 2016

Functional Plant Biol.

172

139

View full text Add to dashboard Cite

Abstract. For a plant to persist in saline soil, osmotic adjustment of all plant cells is essential. The more salt-tolerant species accumulate Na + and Cl -to concentrations in leaves and roots that are similar to the external solution, thus allowing energy-efficient osmotic adjustment. Adverse effects of Na + and Cl -on metabolism must be avoided, resulting in a situation known as 'tissue tolerance'. The strategy of sequestering Na + and Cl -in vacuoles and keeping concentrations low in the cytoplasm is an important contributor to tissue tolerance. Although there are clear differences between species in the ability to accommodate these ions in their leaves, it remains unknown whether there is genetic variation in this ability within a species. This viewpoint considers the concept of tissue tolerance, and how to measure it. Four conclusions are drawn: (1) osmotic adjustment is inseparable from the trait of tissue tolerance; (2) energy-efficient osmotic adjustment should involve ions and only minimal organic solutes; (3) screening methods should focus on measuring tolerance, not injury; and (4) high-throughput protocols that avoid the need for control plants and multiple Na + or Cl -measurements should be developed. We present guidelines to identify useful genetic variation in tissue tolerance that can be harnessed for plant breeding of salt tolerance.

show abstract

“…4A,B,C,D). Increased K + content in the shoots of plants under salinity has been often considered as a tolerance trait (Adem et al, 2014;Hariadi et al, 2011). Polyploid natural accessions in Arabidopsis show higher K + content in leaves, characteristic that correlates with NaCl tolerance, and attribute to the importance of high cytolosolic K + to suppress activity of caspase-like proteolytic and endonucleolytic enzymes triggering PCD.…”

Section: Discussionmentioning

confidence: 99%

Deregulation of apoplastic polyamine oxidase affects development and salt response of tobacco plants

Gémes

Mellidou

Karamanoli

et al. 2017

Journal of Plant Physiology

View full text Add to dashboard Cite

SummaryPolyamine (PA) homeostasis is associated with plant development, growth and responses to biotic/abiotic stresses. Apoplastic PA oxidase (PAO) catalyzes the oxidation of PAs contributing to cellular homeostasis of reactive oxygen species (ROS) and PAs. In tobacco, PAs decrease with plant age, while apoplastic PAO activity increases. Our previous results with young transgenic tobacco plants with enhanced/reduced apoplastic PAO activity (S-ZmPAO/AS-ZmPAO, respectively) established the importance of apoplastic PAO in controlling tolerance to short-term salt stress. However, it remains unclear if the apoplastic PAO pathway is important for salt tolerance at later stages of plant development. In this work, we examined whether apoplastic PAO controls also plant development and tolerance of adult plants during long-term salt stress. The ASZmPAO plants contained higher Ca 2+ during salt stress, showing also reduced chlorophyll content index (CCI), leaf area and biomass but taller phenotype compared to the wild-

show abstract

Evaluating contribution of ionic, osmotic and oxidative stress components towards salinity tolerance in barley

Cited by 166 publications

References 71 publications

Salt acclimation processes in wheat

Salt acclimation processes in wheat

Tissue tolerance: an essential but elusive trait for salt-tolerant crops

Deregulation of apoplastic polyamine oxidase affects development and salt response of tobacco plants

Contact Info

Product

Resources

About