Physiological and biochemical responses to water deficit and recovery of two olive cultivars (Olea europaea L., Arbequina and Empeltre cvs.) under Mediterranean conditions

Melaouhi, Amira; Baraza, Elena; Escalona, José M.; El-Aououad, Hanan; Mahjoub, Imen; Bchir, Amani; Braham, Mohamed; Bota, Josefina

doi:10.1007/s40626-021-00219-9

Cited by 11 publications

(6 citation statements)

References 52 publications

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“…There were no discernible differences in the decrease in the SWC in plants stressed for two and three weeks compared to that of the plants stressed for one week. Melaouhi et al [51] studied the response of two-year-old 'Arbequina' and 'Empeltre' cultivars to mild (30% field capacity) and severe (50% field capacity) stress and found that both treatments resulted in a significant reduction in the SWC, but no differences or interactions between cultivars or treatments and cultivars were observed. Using the SWC as a benchmark, the current study confirmed that drought stress had an equal impact on all the cultivar groups, with the severity directly related to the duration of the water shortage.…”

Section: Discussionmentioning

confidence: 99%

Morpho-Physiological Responses of Three Italian Olive Tree (Olea europaea L.) Cultivars to Drought Stress

Parri,

Romi,

Hoshika

et al. 2023

Horticulturae

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Water scarcity in agriculture can limit crop production and trigger the need for more effective water resource management. As a result, it is critical to identify new crop genotypes that are more drought tolerant and perform better under low irrigation or even rain-fed conditions. The olive tree is a high-value crop that is well adapted to dry Mediterranean conditions. However, different genotypes may have developed different mechanisms of tolerance to water stress. To investigate such mechanisms, we examined three Italian olive cultivars (‘Giarraffa’, ‘Leccino’, and ‘Maurino’) grown in a greenhouse under drought stress. We found that single genotypes responded differently to the drought, though not all parameters revealed significant differences. The first major difference among the cultivars was in transpiration: the lower stomatal density and stomatal conductance of ‘Giarraffa’ allow this cultivar to use water more conservatively. In parallel with the reduction in stomatal and mesophyll conductance, the drought-stressed group of ‘Giarraffa’ maintained the electron transport rate and effective efficiency levels of photosystem II similar to those of the control until the fourth week of stress. The fluorescence parameters revealed the earlier closure of reaction photosynthetic centres in ‘Leccino’. Finally, the higher rate of electrolyte leakage in ‘Maurino’ indicated a significant ions loss in this cultivar when it was subjected to the drought. Both water management under stress conditions and the effect of drought on photosynthesis make ‘Giarraffa’ interesting to researchers studying its use in breeding or water-saving programmes.

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Section: Discussionmentioning

confidence: 99%

Morpho-Physiological Responses of Three Italian Olive Tree (Olea europaea L.) Cultivars to Drought Stress

Parri,

Romi,

Hoshika

et al. 2023

Horticulturae

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“…The data presented showed that the PRO and TSS increased at high regimes of drought as in the cases of MS75 and SS50. Under water deficit conditions, both osmolytes (PRO and TSS) act as respiratory substrates to alleviate stress tolerance (Yooyongwech et al, 2016;Melaouhi et al, 2021). It could be the neutral nature of osmolytes that accumulates to prevent the denaturation of protein and cell membrane in the cytosol during drought conditions for osmotic adjustments and conservation of turgor pressure as described by Hebbache et al (2021).…”

Section: Discussionmentioning

confidence: 99%

Impression of foliar-applied folic acid on coriander (Coriandrum sativum L.) to regulate aerial growth, biochemical activity, and essential oil profiling under drought stress

et al. 2022

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Drought is one of the major environmental limitations in the crop production sector that has a great impact on food security worldwide. Coriander (Coriandrum sativum L.) is an herbaceous angiosperm of culinary significance and highly susceptible to rootzone dryness. Elucidating the drought-induced physio-chemical changes and the foliar-applied folic acid (FA; vitamin B9)-mediated stress tolerance mechanism of coriander has been found as a research hotspot under the progressing water scarcity challenges for agriculture. The significance of folic acid in ameliorating biochemical activities for the improved vegetative growth and performance of coriander under the mild stress (MS75), severe stress (SS50), and unstressed (US100) conditions was examined in this study during two consecutive seasons. The results revealed that the plants treated with 50 mM FA showed the highest plant fresh biomass, leaf fresh biomass, and shoot fresh biomass from bolting stage to seed filling stage under mild drought stress. In addition, total soluble sugars, total flavonoids content, and chlorophyll content showed significant results by the foliar application of FA, while total phenolic content showed non-significant results under MS75 and SS50. It was found that 50 mM of FA upregulated the activity of catalase, superoxide dismutase, and ascorbate peroxidase enzymes in MS75 and SS50 plants compared with untreated FA plants. Thus, FA treatment improved the overall biological yield and economic yield regardless of water deficit conditions. FA-accompanied plants showed a decline in drought susceptibility index, while it improved the drought tolerance efficiency, indicating this variety to become stress tolerant. The optimum harvest index, essential oil (EO) percentage, and oil yield were found in MS75 followed by SS50 in FA-supplemented plants. The gas chromatography–mass spectrometry analysis revealed a higher abundance of linalool as the major chemical constituent of EO, followed by α-terpeniol, terpinene, and p-Cymene in FA-treated SS50 plants. FA can be chosen as a shotgun tactic to improve drought tolerance in coriander by delimiting the drastic changes due to drought stress.

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“…Reductions in F v /F m imply reduced efficiency of the photochemical conversion process, which may suggest possible damage to and inhibition of PSII activity [58]. In general, a strong correlation between net photosynthesis and stomatal conductance has been reported in olive varieties [11,59]. However, according to Brito et al (2018), olive trees that have been under water deficit exhibit a quicker recovery of the photosynthetic rate compared to stomatal conductance, even if they have been pre-exposed to drought conditions before [54].…”

Section: Morphophysiological and Biochemical Responses Of Olive Tree ...mentioning

confidence: 99%

Adaptation Mechanisms of Olive Tree under Drought Stress: The Potential of Modern Omics Approaches

Nteve,

Kostas,

Polidoros

et al. 2024

Agriculture

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Olive (Olea europaea L.) is a crop of enormous economic and cultural importance. Over the years, the worldwide production of olive oil has been decreasing due to various biotic and abiotic factors. The current drop in olive oil production resulting from climate change raises concerns regarding the fulfillment of our daily demand for olive oil and has led to a significant increase in market prices. In the future, there will be a higher chance that we will face a severe shortage of olive oil, which could harm both the economic sector and the food supply. As olive groves cover more than 5 million hectares in the European Union alone, the need to preserve the crop in the context of extreme climatic events is imperative. As drought is considered one of the most limiting factors in agriculture, drought-resistant varieties and sustainable irrigation strategies are being developed to mitigate the impact of drought on crop productivity and secure the future supply of olive oil. This review focuses on recently gained insights into drought stress in olive trees through omics and phenomics approaches to unravelling mechanisms that may lead to developing new varieties that are tolerant against drought elicited by changes in growing systems.

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Physiological and biochemical responses to water deficit and recovery of two olive cultivars (Olea europaea L., Arbequina and Empeltre cvs.) under Mediterranean conditions

Cited by 11 publications

References 52 publications

Morpho-Physiological Responses of Three Italian Olive Tree (Olea europaea L.) Cultivars to Drought Stress

Morpho-Physiological Responses of Three Italian Olive Tree (Olea europaea L.) Cultivars to Drought Stress

Impression of foliar-applied folic acid on coriander (Coriandrum sativum L.) to regulate aerial growth, biochemical activity, and essential oil profiling under drought stress

Adaptation Mechanisms of Olive Tree under Drought Stress: The Potential of Modern Omics Approaches

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