Selenium protects rice plants from water deficit stress

Andrade, Fabrício Ribeiro; Silva, Geanderson Nascimento da; Guimarães, Karina Carvalho; Barreto, Herlon Bruno Ferreira; Souza, Kamila Rezende Dázio de; Guilherme, Luiz Roberto Guimarães; Faquin, Valdemar; Reis, André Rodrigues dos

doi:10.1016/j.ecoenv.2018.08.022

Cited by 81 publications

(29 citation statements)

References 50 publications

(63 reference statements)

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“…that the chilling stress decreased the Na + content in rice plants as well (Figure 4a). A similar decrease of Na + and K + contents was observed under various abiotic stress conditions [67,68,69,70]. Furthermore, nonstressed plants treated with NO showed higher accumulation of Ca 2+ and Mg 2+ , which indicated that NO might upregulate the divalent cations uptake capacity of rice plants which led to the further enhancement of plant growth (Table 1; Figure 4c, d).…”

Section: Discussionsupporting

confidence: 69%

Insights into Nitric Oxide-Mediated Water Balance, Antioxidant Defence and Mineral Homeostasis in Rice (<em>Oryza sativa L.</em>) under Chilling Stress

Sohag¹,

Tahjib‐Ul‐Arif²,

Afrin³

et al. 2020

Preprint

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Being a chilling-sensitive staple crop, rice (Oryza sativa L.) is vulnerable to climate change. The competence of rice to withstand chilling stress should, therefore, be enhanced through technological tools. The present study employed chemical intervention like application of sodium nitroprusside (SNP) as nitric oxide (NO) donor and elucidated the underlying molecular mechanisms of NO-mediated chilling tolerance in rice. At germination stage, germination indicators were interrupted by chilling stress (5.0 ± 1.0°C for 8 h day‒1), while pretreatment with 100 μM SNP markedly improved the indicators. At seedling stage (14-day-old), chilling stress caused stunted growth with visible toxicity along with alteration of biochemical markers, for example, increase in oxidative stress markers (superoxide, hydrogen peroxide, and malondialdehyde) and osmolytes (total soluble sugar; proline and soluble protein content, SPC), and decrease in chlorophyll (Chl), relative water content (RWC), and antioxidants. However, NO application attenuated toxicity symptoms with improving growth performance which might be attributed to enhanced activities of antioxidants, mineral contents, Chl, RWC and SPC. Furthermore, principal component analysis indicated that water imbalance and increased oxidative damage were the main contributors to chilling injury, whereas NO-mediated mineral homeostasis and antioxidant defense were the critical determinants for chilling tolerance in rice. Collectively, our findings revealed that NO protects against chilling stress through valorizing cellular defense mechanisms, suggesting that exogenous application of NO could be a potential tool to evolve cold tolerance as well as climate resilience in rice.

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Section: Discussionsupporting

confidence: 69%

Insights into Nitric Oxide-Mediated Water Balance, Antioxidant Defence and Mineral Homeostasis in Rice (<em>Oryza sativa L.</em>) under Chilling Stress

Sohag¹,

Tahjib‐Ul‐Arif²,

Afrin³

et al. 2020

Preprint

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“…After submission of this manuscript multiple publications described the beneficial effects of Se on abiotic stress tolerance in rice. Se application protects rice plants from water deficit stress (Andrade et al, 2018), since rice plants treated with Se showed a higher net photosynthesis, water use efficiency and antioxidant activities. Moulick et al (2018) reported the influence of Se in mitigating arsenic induced phytotoxicity in rice.…”

Section: Discussionmentioning

confidence: 99%

Sodium Selenate Treatment Using a Combination of Seed Priming and Foliar Spray Alleviates Salinity Stress in Rice

2019

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Soil salinity is one of the important abiotic stress factors that affect rice productivity and quality. Research with several dicotyledonous plants indicated that the detrimental effects associated with salinity stress can (partly) be overcome by the external application of antioxidative substances. For instance, sodium selenate (Na2SeO4) significantly improved the growth and productivity of several crops under various abiotic stress conditions. At present there is no report describing the impact of Na2SeO4 on salinity stressed cereals such as rice. Rice cultivation is threatened by increasing salinity stress, and in future this problem will further be aggravated by global warming and sea level rise, impacting coastal areas. The current study reports on the effect of Na2SeO4 in alleviating salinity stress in rice plants. The optimal concentration of Na2SeO4 and the most efficient mode of selenium application were investigated. Selenium, sodium, and potassium contents in leaves were determined. Antioxidant enzyme activities as well as proline, hydrogen peroxide (H2O2), and malondialdehyde (MDA) concentrations were analyzed. In addition, the transcript levels for OsNHX1, an important Na+/H+ antiporter, were quantified. Treatment of 2-week-old rice plants under 150 mM NaCl stress with 6 mg l-1 Na2SeO4 improved the total biomass. A significantly higher biomass was observed for the plants that received Na2SeO4 by a combination of seed priming and foliar spray compared to the individual treatments. The Na2SeO4 application enhanced the activity of antioxidant enzymes (SOD, APX, CAT, and GSH-Px), increased the proline content, and reduced H2O2 and MDA concentrations in plants under NaCl stress. These biochemical changes were accompanied by increased transcript levels for OsNHX1 resulting in a higher K+/Na+ ratio in the rice plants under NaCl stress. The results suggest that Na2SeO4 treatment alleviates the adverse effect of salinity on rice plant growth through enhancing the antioxidant defense system and increase of OsNHX1 transcript levels.

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“…Se fertilization is a relatively low-cost approach to the prophylaxis of consumers against nutrient deficiency. Several countries, such as Finland, Malawi, Australia, and New Zealand, have supported this strategy through biofortification programs, demonstrated to boost Se content in human tissue and body fluids of the population (Arthur, 2003; Eurola et al, 2004; Chilimba et al, 2012), as well as Brazil, where studies were performed on upland rice (Reis et al, 2018), rice (Andrade et al, 2018) and cowpea (Silva et al, 2018b; Silva et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Combating Micronutrient Deficiency and Enhancing Food Functional Quality Through Selenium Fortification of Select Lettuce Genotypes Grown in a Closed Soilless System

et al. 2019

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Selenium (Se) is an essential trace element for human nutrition and a key component of selenoproteins having fundamental biological and nutraceutical functions. We currently examined lettuce biofortification with Se in an open-gas-exchange growth chamber using closed soilless cultivation for delivering Se-rich food. Morphometric traits, minerals, phenolic acids, and carotenoids of two differently pigmented Salanova cultivars were evaluated in response to six Se concentrations (0–40 μM) delivered as sodium selenate in the nutrient solution. All treatments reduced green lettuce fresh yield slightly (9%), while a decrease in red lettuce was observed only at 32 and 40 μM Se (11 and 21% respectively). Leaf Se content increased in both cultivars, with the red accumulating 57% more Se than the green. At 16 μM Se all detected phenolic acids increased, moreover a substantial increase in anthocyanins (184%) was recorded in red Salanova. Selenium applications slightly reduced the carotenoids content of green Salanova, whereas in red Salanova treated with 32 μM Se violaxanthin + neoxanthin, lutein and β-cryptoxanthin spiked by 38.6, 27.4, and 23.1%, respectively. Lettuce constitutes an ideal target crop for selenium biofortification and closed soilless cultivation comprises an effective tool for producing Se-enriched foods of high nutraceutical value.

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Selenium protects rice plants from water deficit stress

Cited by 81 publications

References 50 publications

Insights into Nitric Oxide-Mediated Water Balance, Antioxidant Defence and Mineral Homeostasis in Rice (<em>Oryza sativa L.</em>) under Chilling Stress

Insights into Nitric Oxide-Mediated Water Balance, Antioxidant Defence and Mineral Homeostasis in Rice (<em>Oryza sativa L.</em>) under Chilling Stress

Sodium Selenate Treatment Using a Combination of Seed Priming and Foliar Spray Alleviates Salinity Stress in Rice

Combating Micronutrient Deficiency and Enhancing Food Functional Quality Through Selenium Fortification of Select Lettuce Genotypes Grown in a Closed Soilless System

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