Drought Effects on Growth, Water Content and Osmoprotectants in Four Olive Cultivars with Different Drought Tolerance

Karimi, Soheil; Rahemi, Majid; Rostami, Ahmad Ali; Sedaghat, Sahar

doi:10.1080/15538362.2018.1438328

Cited by 45 publications

(22 citation statements)

References 46 publications

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“…Results also show that Arbequina presented the highest amount of TSS followed by Chetoui and Arbosana under 50% PRD treatment. These finding agree with previous reports indicating that a higher TSS accumulation improves the plants drought tolerance (Karimi et al, 2018).…”

Section: Osmotic Regulatory Substances Pigments and Oxidative Stresssupporting

confidence: 94%

Water status, biochemical and hormonal changes involved in the response of Olea europaea L. to water deficit induced by partial root-zone drying irrigation (PRD)

Abboud

Vives‐Peris

Dbara

et al. 2021

Scientia Horticulturae

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Changes in antioxidant status, biochemical and hormonal responses, were investigated in three olive cultivars (Arbequina, Arbosana and Chetoui) grown in a super-high-density orchard under partial root-zone drying (PRD) irrigation. Four irrigation treatments were applied during two growing seasons (2015 and 2016); control treatment (100% ETC) irrigated at 100% of crop evapotranspiration on both parts of the root-zone and three PRD irrigation treatments (100% PRD, 75% PRD and 50% PRD) irrigated at 100%, 75%, and 50% of crop evapotranspiration only on one alternated part of the root-zone. The results indicated that the three studied olive cultivars showed a clear difference in their response to PRD irrigation.In fact, PRD irrigation has led to a strong activation of secondary metabolites with antioxidant properties such as pigments, phenols and flavonoids. Other metabolic changes, including the accumulation of soluble sugars and proline have been also triggered by PRD irrigation. Among the studied cultivars, Arbequina displayed the highest levels for proline, total soluble sugars, phenols and flavonoids, and the lowest ones for MDA and H2O2.The increase in SOD, CAT and POD activity and the reduction and PPO activity under PRD irrigation were more pronounced in 2016 season with highest activities obtained from cultivar Arbequina.For all the three cultivars, PRD irrigation increased phytohormones concentration in both, roots and leaves and the highest levels were recorded in 2016. In leaves, Arbequina showed the lowest levels of ABA and the highest levels of JA, SA and IAA. PRD irrigation also induces a higher accumulation of ABA, JA and IAA in dried roots than in wetted ones.Taken together, biochemical mechanisms induced by PRD irrigation were more effective in Arbequina suggesting better protection of their foliar functions compared to other cultivars and its higher adaptability to PRD.

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Section: Osmotic Regulatory Substances Pigments and Oxidative Stresssupporting

confidence: 94%

Water status, biochemical and hormonal changes involved in the response of Olea europaea L. to water deficit induced by partial root-zone drying irrigation (PRD)

Abboud

Vives‐Peris

Dbara

et al. 2021

Scientia Horticulturae

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“…Considerable genotypic differences are present among different cultivars, which employ different mechanisms to cope with drought [3,5,9,13,14,136,137]. In general, olive cultivars native to dry regions have more capability to acclimate to drought conditions than cultivars which originated in regions with a more temperate climate [14]); still, the identification of the traits of the more resistant cultivars is ambiguous, as it depends on the cultivars compared in the studies available.…”

Section: Cultivars’ Response To Droughtmentioning

confidence: 99%

“…In another study, the effect of drought on the inhibition of growth was higher in Fishomi than in Dezful , Amigdalolia and Conservolia cultivars. Dezful , Amigdalolia and Conservolia were able to preserve higher levels of relative leaf water content and membrane stability index under drought stress, due to the higher concentrations of soluble carbohydrates, proline, potassium and calcium in their leaves [137].…”

Section: Cultivars’ Response To Droughtmentioning

confidence: 99%

Drought Stress Effects and Olive Tree Acclimation under a Changing Climate

Brito

Dinis

Moutinho-Pereira

et al. 2019

Plants

164

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Increasing consciousness regarding the nutritional value of olive oil has enhanced the demand for this product and, consequently, the expansion of olive tree cultivation. Although it is considered a highly resilient and tolerant crop to several abiotic stresses, olive growing areas are usually affected by adverse environmental factors, namely, water scarcity, heat and high irradiance, and are especially vulnerable to climate change. In this context, it is imperative to improve agronomic strategies to offset the loss of productivity and possible changes in fruit and oil quality. To develop more efficient and precise measures, it is important to look for new insights concerning response mechanisms to drought stress. In this review, we provided an overview of the global status of olive tree ecology and relevance, as well the influence of environmental abiotic stresses in olive cultivation. Finally, we explored and analysed the deleterious effects caused by drought (e.g., water status and photosynthetic performance impairment, oxidative stress and imbalance in plant nutrition), the most critical stressor to agricultural crops in the Mediterranean region, and the main olive tree responses to withstand this stressor.

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“…Plant photosynthesis is a complex process affected greatly by CO2 concentrations and soil moisture conditions (Drake et al 2017, Guan et al 2018. Soil moisture affects plant growth and development severely (Karimi et al 2018, Bhusal et al 2019, as well as limits plant photosynthesis through carbon metabolism (Bellasio et al 2018, Wang et al 2019. However, plants display adaptability and resistance to water deficits (Renninger et al 2014, Falqueto et al 2017.…”

Section: Introductionmentioning

confidence: 99%

Photosynthetic CO<sub>2</sub> response to soil water and its simulation using different models in leaves of two species

Wu¹,

Zhang²,

Li³

et al. 2020

Photosynt.

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CO2 concentrations and soil moisture conditions are important factors in photosynthesis of trees. This study investigated the photosynthetic CO2 responses in the leaves of Prunus sibirica L. and Pinus tabulaeformis Carr. under eight soil water conditions in a semiarid loess hilly region. CO2-response curves and physiological parameters were fitted using a rectangular hyperbola model, nonrectangular hyperbola model, exponential equation, and modified rectangular hyperbola model. Results revealed the relative soil water content (RWCs) for P. sibirica required to maintain higher photosynthetic rate ranging from 46.5 to 81.6%, and that for P. tabulaeformis ranging from 35.4 to 84.5%. When RWCs exceeded these ranges, the net photosynthetic rate of both species decreased. CO2-response curves and three parameters, carboxylation efficiency, CO2-compensation point, and photorespiration rate, were well fitted by the four models when RWCs was appropriate for P. sibirica and P. tabulaeformis. When RWCs exceeded the optimal ranges, only the modified rectangular hyperbola model could precisely simulate the CO2-response curves and photosynthetic parameters of both species.

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Drought Effects on Growth, Water Content and Osmoprotectants in Four Olive Cultivars with Different Drought Tolerance

Cited by 45 publications

References 46 publications

Water status, biochemical and hormonal changes involved in the response of Olea europaea L. to water deficit induced by partial root-zone drying irrigation (PRD)

Water status, biochemical and hormonal changes involved in the response of Olea europaea L. to water deficit induced by partial root-zone drying irrigation (PRD)

Drought Stress Effects and Olive Tree Acclimation under a Changing Climate

Photosynthetic CO<sub>2</sub> response to soil water and its simulation using different models in leaves of two species

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