Mechanism of Salt Tolerance of Two Olive Olea Europaea L. Cultivars as Related to Electrolyte Concentration and Toxicity

Al-Absi, K. M.; Qrunfleh, Mostafa M.; Abu‐Sharar, T. M.

doi:10.17660/actahortic.2003.618.32

Cited by 16 publications

(7 citation statements)

References 11 publications

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“…It is indigenous to the Mediterranean Basin, where salinity is becoming a serious problem due to insufficient salt leaching in soils and high rates of evaporation (Mousavi et al 2019). Although olive is classified as a moderately salt‐tolerant fruit crop and the tolerance appears to be cultivar‐dependent (Rugini & Fedeli 1990), genotypic responses of olive tree to salinity have not been extensively investigated (Al‐Absi et al 2003; Chartzoulakis 2005). In Iran, the olive industry is considered the most important agri‐business, which has undergone remarkable development over the last two decades, owing to its nutritional and health properties, as well as being a key ingredient in traditional diet (Gorzynik‐Debicka et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Exogenous melatonin mitigates salinity‐induced damage in olive seedlings by modulating ion homeostasis, antioxidant defense, and phytohormone balance

Zahedi

Hosseini

Hoveizeh

et al. 2021

Physiologia Plantarum

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Melatonin (MEL) is a ubiquitous molecule with pleiotropic roles in plant adaption to stress. In this study, we investigated the effects of foliar spray of 100 and 200 μM MEL on the biochemical and physiological traits linked with the growth performance of olive seedlings exposed to moderate (45 mM NaCl) and severe (90 mM NaCl) salinity. Both salt stress conditions caused a considerable reduction in leaf relative water content and the contents of photosynthetic pigments (carotenoids, chlorophylls a and b, and total chlorophylls), K+ and Ca+2, while the contents of Na+ and the activities of antioxidant enzymes increased. In addition, salt‐stressed olive seedlings showed high accumulations of hydrogen peroxide (H2O2), malondialdehyde (MDA), and electrolyte leakage (EL), indicating that olive seedlings suffered from salinity‐induced oxidative damage. In contrast, MEL application revived the growth of olive seedlings, including shoot height, root length and biomass under salt stress conditions. MEL protected the photosynthetic pigments and decreased the Na+/K+ ratio under both moderate and severe salt stresses. Furthermore, MEL induced the accumulations of proline, total soluble sugars, glycine betaine, abscisic acid, and indole acetic acid in salt‐stressed olive seedlings, which showed a positive correlation with improved leaf water status and biomass. MEL application also increased the activities of catalase, superoxide dismutase, ascorbate peroxidase, and peroxidase in salt‐stressed seedlings, resulting in lower levels of H2O2, MDA, and EL in these plants. Taken together, MEL mitigates salinity through its roles in various biochemical and physiological processes, thereby representing a promising agent for application in crop protection.

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Section: Introductionmentioning

confidence: 99%

Exogenous melatonin mitigates salinity‐induced damage in olive seedlings by modulating ion homeostasis, antioxidant defense, and phytohormone balance

Zahedi

Hosseini

Hoveizeh

et al. 2021

Physiologia Plantarum

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“…Olive is considered as a moderately salt tolerant plant and the tolerance appear to be cultivar dependent (Rugini and Fedeli, 1990). The olive crop counts a very rich varietal heritage (Mousavi et al, 2017) but genotypic responses of olive to NaCl salinity have not been extensively investigated, and only few works have been published (Al-Absi et al, 2003; Chartzoulakis, 2005). In this context it’s important to select cultivars that may give good performance when cultivated in soil with salinity problems or irrigated with saline water.…”

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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“…The results of many experiments indicated that the characteristics of root growth (length and number of roots and dry and soft weights of the root system) were negatively affected as a result of saline stress and that's mean a decrease on the biomass of the roots (AL-Absi et al, 2003;Liu et al, 2012). The roots depth and spread in the soil were affected negatively by salinity and accumulation of salts ions in the soil, and perhaps the decrease of the growth characteristics of the root system is due to the decrease in the characteristics of vegetative growth with salt levels rising (Zhu, 2001;Sairam and Tyagi, 2004).…”

Section: Effect Of Saline Stress On the Root Growth Characteristics:-mentioning

confidence: 99%

Effect of Saline Stress on Growth of Fruit Plants (Review Article)

Alalaf¹,

Fekry²

2020

Mesopotamia Journal of Agriculture

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Soil and irrigation water salinity are among the main problems hindering agricultural development, especially in arid and semi-arid regions, which depends on especially surface irrigation as the main means in agriculture. The salinity lead to low growth and production of plants, including fruit, as a result of the temporal, azalotic, or nutrients imbalance. Salinity of the soil or irrigation water greatly reduces the growth, productivity and quality of fruit crops by affecting their physiological, chemical and biological functions as they cause obstruction to the absorption of some elements by the plant and if it increased absorption of salts, it causes ion poisoning of the cell, as well as increased salts cause less absorption of water by the plant due to the high osmosis of soil water. There are many ways to reduce the salt stress in the growth of fruit plants, the most important of which is adding organic fertilizers such as humic acid or spraying with the amino acid proline.

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Mechanism of Salt Tolerance of Two Olive Olea Europaea L. Cultivars as Related to Electrolyte Concentration and Toxicity

Cited by 16 publications

References 11 publications

Exogenous melatonin mitigates salinity‐induced damage in olive seedlings by modulating ion homeostasis, antioxidant defense, and phytohormone balance

Exogenous melatonin mitigates salinity‐induced damage in olive seedlings by modulating ion homeostasis, antioxidant defense, and phytohormone balance

Behavior of Four Olive Cultivars During Salt Stress

Effect of Saline Stress on Growth of Fruit Plants (Review Article)

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