Unraveling physiological, biochemical and molecular mechanisms involved in olive ( Olea europaea L. cv. Chétoui ) tolerance to drought and salt stresses

Abdallah, Mariem Ben; Trupiano, Dalila; Polzella, Antonella; Zio, Elena De; Sassi, Mauro; Scaloni, Andrea; Zarrouk, Mokhtar; Youssef, Nabil Ben; Scippa, Gabriella Stefania

doi:10.1016/j.jplph.2017.10.009

Cited by 61 publications

(68 citation statements)

References 73 publications

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“…Significant reductions in RWC, Ψ w , gs, E, TCC and Fv/Fm and increases in ProC and SSC were observed after subjecting young olive plants to water deficit. These findings are consistent with results of other studies that confirmed the changes caused by water stress in a number of physiological and biochemical parameters that regulate drought tolerance and growth in plants [7,15,[30][31][32][33][34]. Ben Ahmed et al [32] reported a reduction in RWC, Ψ w , gs and E of 32% and 51%, 43% and 48% respectively, in "Chemlali", "Meski" and "Picholine" olive varieties under water deficit treatment.…”

Section: Discussionsupporting

confidence: 90%

“…The same authors reported that water-stressed olive plants tended to accumulate proline and soluble sugars and to lose an amount of chlorophyll. The decline in RWC, E and gs, accompanied by an increase in soluble sugar in olive plants subjected to drought stress was also observed by Ben Abdallah et al [15]. Boussadia et al [35] noted a significant increase in proline and carbohydrate levels in the leaves of "Koroneiki" and "Meski" olive varieties under water stress.…”

Section: Discussionsupporting

confidence: 55%

“…Reductions in TCC associated with parallel decreases in RWC and Ψ w were previously documented and could be attributed to the sensitivity of this pigment to water deficit [5,13,19,25,36]. However, no impact of drought stress on TCC was observed by Ben Abdallah et al [15]. The same authors also reported no significant effect on Fv/Fm, whereas a slight decrease in Fv/Fm in "Chétoui" olive leaves was shown by Guerfel et al [20].…”

Section: Discussionmentioning

confidence: 82%

“…In fact, closure of stomata can reduce excessive water loss under stress conditions [12]. The regulation of gas exchanges and biochemical behavior in olive plants as tools for tolerance to water stress has also been described in various studies [13][14][15]. Proline and sugars act as osmolytes facilitating the retention of water in the cytoplasm, hence preventing membrane damage [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

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Physiological and biochemical responses of young olive trees (Olea europaea L.) to water stress during flowering

Yamani

Sakar

Boussakouran

et al. 2019

Arch biol sci (Beogr)

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This study examines physiological and biochemical changes in three Moroccan varieties of young olive trees (Olea europaea L.) grown under three different water regimes (control, moderate stress and severe stress). Leaf relative water content (RWC), water potential (Ψw), transpiration rate (E), stomatal conductance (gs), maximum quantum efficiency of PSII (Fv/Fm), the contents of total chlorophyll (TCC), proline (ProC) and soluble sugars (SSC) were measured at the flowering stage during three growing seasons (2015, 2016 and 2017). ANOVA analyses showed that the effect of the water regime was predominant in all of the examined parameters, except for Fv/Fm, which was under the effect of both water regime and growing season. Impacts of variety and interactions were of lesser magnitude. Water deficit reduced E, Ψw and gs by 25%, while its effect on RWC and Fv/Fm was a decrease of about 7%; however, increases in SSC and ProC were more than 10%. Among the growing seasons, 2015 flowering displayed the lowest values for RWC, Ψw, E, gs, TCC and Fv/Fm, and the highest for ProC and SSC. Among plant varieties, no significant differences were observed. The three principal component (PC) axes accounted for 91% of total variance. PC1 was better explained by the water regime, while the growing season fitted PC3 variability. Correlation studies highlighted significant associations between most parameters. Positive relationships were found between RWC, Ψw, E, gs, Fv/Fm and TCC, while all of these parameters were negatively linked to ProC and SSC.

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Section: Discussionsupporting

confidence: 90%

Section: Discussionsupporting

confidence: 55%

Section: Discussionmentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Physiological and biochemical responses of young olive trees (Olea europaea L.) to water stress during flowering

Yamani

Sakar

Boussakouran

et al. 2019

Arch biol sci (Beogr)

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“…In particular, plants under high salinity conditions are subject to significant physiological and biochemical changes, for example a marked decrease in photosynthesis rate and transport of salt ions from roots to shoots (Ben Ahmed et al, 2009; Anjum et al, 2011; Singh and Reddy, 2011; Goltsev et al, 2012; Abdallah et al, 2018). A major biochemical alteration, also induced by other types of stress, is the production of reactive oxygen species (ROS) (Gill and Tuteja, 2010; Boguszewska and Zagdańska, 2012; Ozgur et al, 2013; Bose et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Behavior of Four Olive Cultivars During Salt Stress

et al. 2019

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Olive is considered as a moderately salt tolerant plant, however, tolerance to salt appears to be cultivar-dependent and genotypic responses have not been extensively investigated. In this work, saline stress was induced in four olive cultivars: Arbequina, Koroneiki, Royal de Cazorla and Fadak 86. The plants were grown in 2.5 l pots containing 60% peat and 40% of pumice mixture for 240 days and were irrigated three times a week with half-strength Hoagland solution containing 0, 100 and 200 mM NaCl. The effects of salt stress on growth, physiological and biochemical parameters were determined after 180, 210, and 240 days of treatment. Saline stress response was evaluated in leaves by measuring the activity of GSH and CAT enzymatic activity, as well as proline levels, gas exchanges, leaves relative water content and chlorophyll content, and proline content. All the studied cultivars showed a decrease in Net Photosynthesis, leaves chlorophyll content and plant growth (mainly leaves dry weight) and an increase in the activity of GSH and CAT. In addition, the reduction of proline content in leaf tissues, induced an alteration of osmotic regulation. Among the studied cultivars Royal and Koroneiki better counteracting the effects of saline stress thanks to a higher activity of two antioxidant enzymes.

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Medicinal Plants Proteomics in Response to Abiotic Stresses

Alugoju¹,

Tencomnao²

2023

Medicinal Plants

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Unraveling physiological, biochemical and molecular mechanisms involved in olive ( Olea europaea L. cv. Chétoui ) tolerance to drought and salt stresses

Cited by 61 publications

References 73 publications

Physiological and biochemical responses of young olive trees (Olea europaea L.) to water stress during flowering

Physiological and biochemical responses of young olive trees (Olea europaea L.) to water stress during flowering

Behavior of Four Olive Cultivars During Salt Stress

Medicinal Plants Proteomics in Response to Abiotic Stresses

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