Water relations and photo-protection mechanisms during drought stress in four coffee (Coffea arabica) cultivars from southwestern Saudi Arabia

Tounekti, Taïeb; Mahdhi, Mosbah; Al‐Turki, Turki A.; Khemira, Habib

doi:10.1016/j.sajb.2018.04.022

Cited by 36 publications

(39 citation statements)

References 33 publications

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“…Moreover, decrease in E and G s might have also occurred due to stomatal closure as its a defensive response of the plant under drought stress to conserve water by minimizing water loss through the stomata [ 55 ]. Relatively higher values of P N , E and G s in genotype 7126 compared to 8046 could be the result of more efficient and better stomatal control of genotype 7126 to manage water loss by transpiration under limited soil moisture conditions [ 56 ].…”

Section: Discussionmentioning

confidence: 99%

Differential physio-biochemical and yield responses of Camelina sativa L. under varying irrigation water regimes in semi-arid climatic conditions

et al. 2020

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Camelina sativa L. is an oilseed crop with wide nutritional and industrial applications. Because of favorable agronomic characteristics of C. sativa in a water-limiting environment interest in its production has increased worldwide. In this study the effect of different irrigation regimes (I0 = three irrigations, I1 = two irrigations, I2 = one irrigation and I3 = one irrigation) on physio-biochemical responses and seed yield attributes of two C. sativa genotypes was explored under semi-arid conditions. Results indicated that maximum physio-biochemical activity, seed yield and oil contents appeared in genotype 7126 with three irrigations (I0). In contrast water deficit stress created by withholding irrigation (I1, I2 and I3) at different growth stages significantly reduced the physio-biochemical activity as well as yield responses in both C. sativa genotypes. Nonetheless the highest reduction in physio-biochemical and yield attributes were observed in genotype 8046 when irrigation was skipped at vegetative and flowering stages of crop (I3). In genotypic comparison, C. sativa genotype 7126 performed better than 8046 under all I1, I2 and I3 irrigation treatments. Because 7126 exhibited better maintenance of tissue water content, leaf gas exchange traits and chlorophyll pigment production, resulting in better seed yield and oil production. Findings of this study suggest that to achieve maximum yield potential in camelina three irrigations are needed under semi-arid conditions, however application of two irrigations one at flowering and second at silique development stage can ensure an economic seed yield and oil contents. Furthermore, genotype 7126 should be adopted for cultivation under water limited arid and semi-arid regions due to its better adaptability.

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Section: Discussionmentioning

confidence: 99%

Differential physio-biochemical and yield responses of Camelina sativa L. under varying irrigation water regimes in semi-arid climatic conditions

et al. 2020

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“…Therefore, irrigation using local artesian water in 2-day-intervals regime during the dry season is common among farmers. Furthermore, much of the data on effects of drought on coffee comes from experiments under controlled conditions (Tesfaye et al, 2008, Worku and Astatkie, 2010, King’oro et al, 2014, Tounekti et al, 2018). However, our 8-weeks irrigation regimes experiment was conducted in the field to gain information of high agronomic relevance on effects of irrigation frequency on photosynthesis in coffee plants.…”

Section: Discussionmentioning

confidence: 99%

“…This species is socioeconomically important and source of income for mountain farmers in southwestern Saudi Arabia. Increased interest in coffee production led to accelerated research into coffee agriculture in the region (Al-Abdulkader et al, 2017, Mahdhi et al, 2017, Tounekti et al, 2017, Tounekti et al, 2018). In this region Fifa Mountain reaches altitude of 1800 m and coffee plantations rely on moderate temperature, high humidity, and rainfall.…”

Section: Introductionmentioning

confidence: 99%

Coffee production in southern Saudi Arabian highlands: Current status and water conservation

Sayed

Masrahi

Remesh

et al. 2019

Saudi Journal of Biological Sciences

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Work aimed at assessing status and introducing water conservation regimes for coffee production in southern Saudi Arabian highlands. Data on farm locations, altitudes, areas, practices, irrigation, tree density, and annual coffee production were analyzed. Field experiment using chlorophyll fluorescence and different irrigation regimes was conducted to examine effects of reducing irrigation frequency on photosynthesis. Results indicated that Coffea arabica L. is commonly grown at altitudes of 1300–1400 m. Plants grown at 4–6 Trees m−2 using 100 kg ha−1 mineral fertilizer produce an average of 3 t ha−1. High frequency 2-day-intervals irrigation regime practiced by farmers during the dry season presents ecological challenge to limited local artesian water resources. Changes in chlorophyll fluorescence under 14-day-intervals irrigation regime initiated water stress that markedly inhibited Photosystem II efficiency and quantum yield and increased non-photochemical energy dissipation. Applying a 7-day-intervals irrigation regime induced less inhibitory effects on Photosystem II. Results also indicated that shifting from 2-day-intervals irrigation regime to 7-day-intervals regime improves coffee agroecology and directs coffee production towards sustainability.

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“…Similarly, favorable changes in biochemical composition like higher accumulation of epicuticular wax, free proline, total protein content and chlorophyll fractions in drought tolerant genotypes has been reported in coffee (D' Souza et al, 2009). Tounekti et al (2018). Robusta coffee clones (IC-2, IC-3, IC-4, IC-6, IC-8 and R-4) were subjected to two treatments: well-watered control and drought-stressed, the results revealed that leaf proline concentration substantially increased with time of exposure of the plants to soil drying.…”

Section: Proline Accumulation On Coffee Under Drought Conditionsmentioning

confidence: 97%

“…High osmotic adjustments occur in the drought tolerant cultivars through accumulation of solute such as free proline which increase the bound water capacity, regulate stomatal movement, trigger water uptake, induce heat stability and maintain the integrity of the cell membrane (Venkataramanan, 1985), because of its role in osmotic adjustment (OA), accumulation of proline in plant tissue under water deficit condition has been also considered as one of the adaptive mechanisms in drought-tolerant genotypes (Heuer, 1999). Proline accumulation on leaves of four Arabica coffee cultivars were done, from these Dawairi and Tessawi are better stresses tolerant due to highest levels of proline in their leaves as compared to other cultivars (Figure 3) (Tounekti et al, 2018). Similarly, favorable changes in biochemical composition like higher accumulation of epicuticular wax, free proline, total protein content and chlorophyll fractions in drought tolerant genotypes has been reported in coffee (D' Souza et al, 2009).…”

Section: Proline Accumulation On Coffee Under Drought Conditionsmentioning

confidence: 99%

Review on Role of Proline on Coffee Under Drought Conditions

2019

JEES

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Drought is one of the major constraints that limiting production of crop worldwide. Plants tolerate drought by many ways like morphological, physiological and biochemical tolerance mechanisms. Plants develop mechanisms to tolerant abiotic stress by osmotic adjustment that is usually accomplished by uptake of inorganic ions, as well as the accumulation of proline. Proline is a universal osmo-protectant and acts as an osmolyte and antioxidant, and it is one of the most important compatible solutes that play a vital role in osmotic adjustment in crops under drought stress. Accumulation of proline considered as adaptive mechanisms in drought-tolerant coffee genotypes. In general, more attention on biochemical traits for drought tolerant mechanisms on coffee should be given. Therefore, looking for high proline accumulation genotype under drought conditions is important for further coffee breeding program to release drought tolerant genotypes.

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Water relations and photo-protection mechanisms during drought stress in four coffee (Coffea arabica) cultivars from southwestern Saudi Arabia

Cited by 36 publications

References 33 publications

Differential physio-biochemical and yield responses of Camelina sativa L. under varying irrigation water regimes in semi-arid climatic conditions

Differential physio-biochemical and yield responses of Camelina sativa L. under varying irrigation water regimes in semi-arid climatic conditions

Coffee production in southern Saudi Arabian highlands: Current status and water conservation

Review on Role of Proline on Coffee Under Drought Conditions

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