Responses to Water Deficit and Salt Stress in Silver Fir (Abies alba Mill.) Seedlings

(Morar), Irina Maria Todea; González-Orenga, Sara; Boscaiu, Mónica; Plazas, Mariola; Sestraș, Adriana F.; Prohens, Jaime; Vicente, Óscar; Sestraş, Radu E.

doi:10.3390/f11040395

Cited by 13 publications

(7 citation statements)

References 88 publications

(68 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The results presented here indicate that the patterns of stress-induced changes in antioxidant enzyme activities were the same for the two selected lavender cultivars since, with very few exceptions, no significant differences between LAC and LAS plants were observed in any of the control or stress treatments. Also, no significant increase in any of the enzyme activities has been detected in response to water deficit; in fact, the GR activity even decreased significantly in both lavender varieties, as reported in other species, for example in spruce seedlings (Todea et al, 2020). These data suggest that the antioxidant response to drought in lavender is primary based on the accumulation of phenolic compounds, in general, and of flavonoids, in particular, without involvement of the assayed antioxidant enzyme systems.…”

Section: Discussionsupporting

confidence: 65%

Antioxidant responses to drought and salinity in Lavandula angustifolia Mill.

Szekely-Varga

González-Orenga

Cantor

et al. 2020

Not Bot Horti Agrobo

Self Cite

View full text Add to dashboard Cite

Drought and salinity are amongst the most damaging environmental stressors that can affect a plant's life cycle, from germination to senescence. In the present study were analysed the responses to salinity and drought in greenhouse-controlled conditions of two varieties of Lavandula angustifolia. Three-month-old lavender seedlings were subjected to water deficit and salt stress (100, 200 and 300 mM NaCl) during a 30-day period. Complementing a previous analysis focused on stress tolerance mechanisms based on the regulation of ion transport and the synthesis of osmolytes, we have now evaluated the effects of the water deficit and salt treatments on the generation of secondary oxidative stress, by measuring malondialdehyde levels, and the activation of antioxidant systems, both non-enzymatic and enzymatic, determining total phenolic compounds and flavonoids contents and calculating superoxide dismutase, catalase, ascorbate peroxidase and glutathione reductase specific activities, respectively, in extracts of control and stressed plants. The results obtained confirm that both lavender varieties react in the same way to the applied stress treatments, activating the same antioxidant responses. However, some differences were observed when comparing the specific mechanisms triggered by each type of stress. Thus, the oxidative stress induced under drought conditions was counteracted by accumulation of phenolic compounds and flavonoids, without apparent involvement of antioxidant enzymes. Salt stress, on the other hand, in addition to an increase in flavonoid levels also induced superoxide dismutase and catalase activities. These antioxidant responses are likely to contribute to the relatively high tolerance (as compared to most crops) of lavender to drought and salinity.

show abstract

Section: Discussionsupporting

confidence: 65%

Antioxidant responses to drought and salinity in Lavandula angustifolia Mill.

Szekely-Varga

González-Orenga

Cantor

et al. 2020

Not Bot Horti Agrobo

Self Cite

View full text Add to dashboard Cite

show abstract

“…In contrast, the proline of AM plants peaked under 320 mM NaCl, and the value is higher than corresponding NM plants, which showed that AM plants possess stronger resistance. Plants can resist salt stress by accumulating soluble protein and proline, and AMF can effectively alleviate the damage of osmotic metabolism system caused by high concentrations of NaCl ( Dudhane et al, 2011 ; Todea et al, 2020 ). Studies have shown that AMF can maintain a low intracellular osmotic potential and normal cellular metabolism by promoting the accumulation of proline in mycorrhizal plants under salt stress ( Feng et al, 2002 ).…”

Section: Discussionmentioning

confidence: 99%

Arbuscular mycorrhizal fungi alleviates salt stress in Xanthoceras sorbifolium through improved osmotic tolerance, antioxidant activity, and photosynthesis

Zong

Huang²,

Yang³

2023

Front. Microbiol.

View full text Add to dashboard Cite

Mycorrhizal inoculation was widely reported to alleviate the damage resulting from NaCl by various physiological ways. However, the symbiotic benefit under distant NaCl concentrations and the relationship among different responsive physiological processes were elusive. In this study, saline resistant plant Xanthoceras sorbifolium was selected as the experimental material and five concentrations of NaCl in the presence or absence of Arbuscular Mycorrhiza Fungi (AMF) were conducted, in order to understand the differences and similarities on the photosynthesis, antioxidant activity, and osmotic adjustment between arbuscular mycorrhizal (AM) plants and non-arbuscular mycorrhizal (NM) plants. Under low salt stress, X. sorbifolium can adapt to salinity by accumulating osmotic adjustment substances, such as soluble protein and proline, increasing superoxide dismutase (SOD), catalase (CAT) activity, and glutathione (GSH). However, under high concentrations of NaCl [240 and 320 mM (mmol·L−1)], the resistant ability of the plants significantly decreased, as evidenced by the significant downregulation of photosynthetic capacity and biomass compared with the control plants in both AM and NM groups. This demonstrates that the regulatory capacity of X. sorbifolium was limiting, and it played a crucial role mainly under the conditions of 0–160 mM NaCl. After inoculation of AMF, the concentration of Na+ in roots was apparently lower than that of NM plants, while Gs (Stomatal conductance) and Ci (Intercellular CO2 concentration) increased, leading to increases in Pn (Net photosynthetic rate) as well. Moreover, under high salt stress, proline, soluble protein, GSH, and reduced ascorbic acid (ASA) in AM plants are higher in comparison with NM plants, revealing that mycorrhizal symbiotic benefits are more crucial against severe salinity toxicity. Meanwhile, X. sorbifolium itself has relatively high tolerance to salinity, and AMF inoculation can significantly increase the resistant ability against NaCl, whose function was more important under high concentrations.

show abstract

“…Salt stress increased DAO and PAO activities in the roots of salt-resistant rice cultivars and in the shoots of saltsensitive ones (Quinet et al 2010). However, the activities of cw-POD and PAO decreased in hyperhydricity of garlic plantlets under oxidative stress treatment (Tian et al 2017). Moreover, cw-POD-dependent and PAO-dependent H2O2 generation was the major source of H2O2 accumulation in the roots of cucumber under salt stress (Wu et al 2018).…”

Section: Discussionmentioning

confidence: 97%

Comparison of antioxidant enzyme activity and gene expression in two new spring wheat cultivars treated with salinity

Xu¹,

Zhang²,

Li³

et al. 2021

Biologia plant.

View full text Add to dashboard Cite

This study aimed to analyze element content, antioxidative response, and related gene expression in two new wheat (Tritium aestivum L.) cultivars Longchun 30 and Longchun 27 when exposed to different NaCl concentrations. Low NaCl concentration (25 mM) promoted root growth and decreased malondialdehyde (MDA) content and relative conductivity (REC) in Longchun 30. Differently, higher salinity stress (100 and 200 mM NaCl) inhibited root growth and increased MDA content and REC in both cultivars. Under salt stress, the increment of Na content in the roots and leaves and the reduction of Ca content in the roots were more remarkable in Longchun 27 than in Longchun 30. In contrast, the potassium content decreased in the roots but did not significantly change in the leaves in both cultivars under salinity. When the seedlings were exposed to salinity, the increases of superoxide dismutase (SOD) and catalase (CAT) activities in Longchun 27 roots were associated with high isoenzymes abundance and high TaCu/ZnSOD, TaMnSOD and TaCAT expression. Meanwhile, total peroxidase (POD) activity induced by NaCl treatment coincided with the changes of TaPOD expression and isoenzyme abundance in both cultivars. Besides, the inhibition of activities of apoplastic antioxidant enzymes, cell wall-bound POD, diamine oxidase, and polyamine oxidase was observed in salinity-stressed roots of both cultivars. Taken together, cv. Longchun 30 might be more suitable for growing in salinity environment in comparison with Longchun 27.

show abstract

Responses to Water Deficit and Salt Stress in Silver Fir (Abies alba Mill.) Seedlings

Cited by 13 publications

References 88 publications

Antioxidant responses to drought and salinity in Lavandula angustifolia Mill.

Antioxidant responses to drought and salinity in Lavandula angustifolia Mill.

Arbuscular mycorrhizal fungi alleviates salt stress in Xanthoceras sorbifolium through improved osmotic tolerance, antioxidant activity, and photosynthesis

Comparison of antioxidant enzyme activity and gene expression in two new spring wheat cultivars treated with salinity

Contact Info

Product

Resources

About