High-salinity activates photoprotective mechanisms in Quercus suber via accumulation of carbohydrates and involvement of non-enzymatic and enzymatic antioxidant pathways

Oliveira, José Miguel P. Ferreira de; Santos, Conceição; Araújo, Márcia; Oliveira, M. Margarida; Dias, Maria Celeste

doi:10.1007/s11056-021-09856-z

Cited by 6 publications

(13 citation statements)

References 42 publications

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“…Particularly intriguing is the identity of genes involved in regulating early vs. later responses. We demonstrated previously [26] that the application of 300 mM NaCl in young Q. suber plants induced leaf physiological responses as decrease of photosynthesis related parameters, pigments, and carbohydrate profiles. In addition, these studies showed antioxidant responses that were also dependent of the extent of salt exposure.…”

Section: Discussionmentioning

confidence: 73%

“…Moreover, several leaf adaptation mechanisms to high salinity were also induced in Q. suber plants, suggesting a plastic adaptation of this species to cope with salinity. The roots are the first organ affected by soil salinity, therefore, to complement the previous studied in leaves [26], the present work focuses on this organ.…”

Section: Discussionmentioning

confidence: 99%

“…Q. suber half-sibling acorns (collected from one open pollinated mother tree growing at Instituto Superior de Agronomia in Lisbon, Portugal) were germinated in plastic dark pots (400 mL) with a soil mixture of turf and vermiculite (2:1) as described in Ferreira de Oliveira et al [26]. Seedlings were grown in a climatic room with a photoperiod of 16 h, a temperature of 22 ± 2 • C and a photosynthetic photon flux density of 200 ± 10 µmol m −2 s −1 for two months.…”

Section: Plant Materials and Experimental Designmentioning

confidence: 99%

“…We have recently demonstrated [26] that leaves of young cork oak plants exposed to 300 mM NaCl showed oxidative damages, photosynthetic impairment, and chlorophyll decreases. However, in the same study, cork oak leaves also showed features of salt-tolerant species, such as increased energy dissipation mechanisms (non-photochemical quenching), accumulated primary metabolites (soluble sugars and starch), and upregulated antioxidant enzymes to cope with the salt stress.…”

Section: Introductionmentioning

confidence: 99%

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Quercus suber Roots Activate Antioxidant and Membrane Protective Processes in Response to High Salinity

Dias

Santos

Araújo

et al. 2022

Plants

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Cork oak (Quercus suber) is a species native to Mediterranean areas and its adaptation to the increasingly prevalent abiotic stresses, such as soil salinization, remain unknown. In sequence with recent studies on salt stress response in the leaf, it is fundamental to uncover the plasticity of roots directly exposed to high salinity to better understand how Q. suber copes with salt stress. In the present study we aimed to unveil the antioxidants and key-genes involved in the stress-responses (early vs. later responses) of Q. suber roots exposed to high salinity. Two-month-old Q. suber plants were watered with 300 mM NaCl solution and enzymatic and non-enzymatic antioxidants, lipid peroxidation and the relative expression of genes related to stress response were analysed 8 h and 6 days after salt treatment. After an 8 h of exposure, roots activated the expression of QsLTI30 and QsFAD7 genes involved in stress membrane protection, and QsRAV1 and QsCZF1 genes involved in tolerance and adaptation. As a result of the continued salinity stress (6 days), lipid peroxidation increased, which was associated with an upregulation of QsLTI30 gene. Moreover, other protective mechanisms were activated, such as the upregulation of genes related to antioxidant status, QsCSD1 and QsAPX2, and the increase of the antioxidant enzyme activities of superoxide dismutase, catalase, and ascorbate peroxidase, concomitantly with total antioxidant activity and phenols. These data suggest a response dependent on the time of salinity exposure, leading Q. suber roots to adopt protective complementary strategies to deal with salt stress.

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Section: Discussionmentioning

confidence: 73%

Section: Discussionmentioning

confidence: 99%

Section: Plant Materials and Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Quercus suber Roots Activate Antioxidant and Membrane Protective Processes in Response to High Salinity

Dias

Santos

Araújo

et al. 2022

Plants

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“…These mechanisms include increased production of antioxidant metabolites (e.g., flavonoids, proline, and enzymes) that help in the control of reactive oxygen species (ROS) to avoid oxidative stress and changes in the levels of phytohormones (e.g., ABA and JA) ( Zandalinas et al., 2020 ; Ma et al., 2020 ; Dias et al., 2022 ; Dias et al., 2018 ). Hence, drought and salinity represent a major threat to plant productivity ( Daliakopoulos et al., 2016 ; de Oliveira et al., 2022 ). The first morphophysiological responses of plants to drought and salinity are very similar, inducing water stress, leading to cellular dehydration and a reduction in water potential, hampering cell expansion and wall synthesis, growth and shoot development ( Ma et al., 2020 ).…”

Section: Impact Of Abiotic Stresses On Plant Performancementioning

confidence: 99%

Strategies and prospects for biostimulants to alleviate abiotic stress in plants

Freitas

Dias

2022

Front. Plant Sci.

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Global climate change-induced abiotic stresses (e.g., drought, salinity, extreme temperatures, heavy metals, and UV radiation) have destabilized the fragile agroecosystems and impaired plant performance and thereby reducing crop productivity and quality. Biostimulants, as a promising and eco-friendly approach, are widely used to address environmental concerns and fulfill the need for developing sustainable/modern agriculture. Current knowledge revealed that plant and animal derived stimulants (e.g., seaweeds and phytoextracts, humic substances, and protein hydrolysate) as well as microbial stimulants (e.g., plant beneficial bacteria or fungi) have great potential to elicit plant tolerance to various abiotic stresses and thus enhancing plant growth and performance-related parameters (such as root growth/diameter, flowering, nutrient use efficiency/translocation, soil water holding capacity, and microbial activity). However, to successfully implement biostimulant-based agriculture in the field under changing climate, the understanding of agricultural functions and action mechanism of biostimulants coping with various abiotic stresses at physicochemical, metabolic, and molecular levels is needed. Therefore, this review attempts to unravel the underlying mechanisms of action mediated by diverse biostimulants in relation to abiotic stress alleviation as well as to discuss the current challenges in their commercialization and implementation in agriculture under changing climate conditions.

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Impact of Salinity Stress on Medicinal Plants

Haider¹,

Ashraf²,

Rasheed³

et al. 2023

Medicinal Plants

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High-salinity activates photoprotective mechanisms in Quercus suber via accumulation of carbohydrates and involvement of non-enzymatic and enzymatic antioxidant pathways

Cited by 6 publications

References 42 publications

Quercus suber Roots Activate Antioxidant and Membrane Protective Processes in Response to High Salinity

Quercus suber Roots Activate Antioxidant and Membrane Protective Processes in Response to High Salinity

Strategies and prospects for biostimulants to alleviate abiotic stress in plants

Impact of Salinity Stress on Medicinal Plants

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