How far can chlorophyll a fluorescence detect phosphorus status in wheat leaves (Triticum durum L.)

El-Mejjaouy, Yousra; Lahrir, Meryeme; Naciri, Rachida; Zeroual, Youssef; Mercatoris, Benoît; Dumont, Benjamin; Oukarroum, Abdallah

doi:10.1016/j.envexpbot.2021.104762

Cited by 14 publications

(8 citation statements)

References 33 publications

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“…In the present work, the diminution in J-I-P fluorescence yield ( Figure 2A ) was more significant for salt-stressed and unfertilized plants (C+) in comparison with fertilized ones. These results suggest a restriction of both donor and accepter-side of PSI (reduced J-I-P yield), which indicates that P in wheat leaves stimulated the intersystem electron transport regulation between PSII and PSI ( El-Mejjaouy et al., 2022 ). This could reveal a cellular adaptation to alleviate the harmful effect of salt stress and ensure photosynthetic electron transport equilibrium ( Kalaji et al., 2016 ; Loudari et al., 2020 ; Muhammad et al., 2021 ).…”

Section: Discussionmentioning

confidence: 86%

“…Prolonged exposure to salt stress or/and P deficiency disturbs biochemical processes (e.g., the activity of Rubisco and Ribulose-1,5-bisphosphate (RuBP) and triose phosphates regeneration) which control gas exchange ( Meng et al., 2021 ). Additionally, several studies showed that P deficiency disturbs ultimately CO2 assimilation ( Rychter et al., 2018 ; El-Mejjaouy et al., 2022 ). Besides, it has been reported that in response to the decrease in CO 2 concentration in leaf intercellular airspaces, the activity of other enzymes (Sucrose phosphate synthase (SPS) or nitrate reductase) was reduced ( Muhammad et al., 2021 ).…”

Section: Discussionmentioning

confidence: 99%

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Photosynthetic performance and nutrient uptake under salt stress: Differential responses of wheat plants to contrasting phosphorus forms and rates

et al. 2022

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Salt stress impacts phosphorus (P) bioavailability, mobility, and its uptake by plants. Since P is involved in many key processes in plants, salinity and P deficiency could significantly cause serious damage to photosynthesis, the most essential physiological process for the growth and development of all green plants. Different approaches have been proposed and adopted to minimize the harmful effects of their combined effect. Optimising phosphorus nutrition seems to bring positive results to improve photosynthetic efficiency and nutrient uptake. The present work posed the question if soluble fertilizers allow wheat plants to counter the adverse effect of salt stress. A pot experiment was performed using a Moroccan cultivar of durum wheat: Karim. This study focused on different growth and physiological responses of wheat plants grown under the combined effect of salinity and P-availability. Two Orthophosphates (Ortho-A & Ortho-B) and one polyphosphate (Poly-B) were applied at different P levels (0, 30 and 45 ppm). Plant growth was analysed on some physiological parameters (stomatal conductance (SC), chlorophyll content index (CCI), chlorophyll a fluorescence, shoot and root biomass, and mineral uptake). Fertilized wheat plants showed a significant increase in photosynthetic performance and nutrient uptake. Compared to salt-stressed and unfertilized plants (C+), CCI increased by 93%, 81% and 71% at 30 ppm of P in plants fertilized by Poly-B, Ortho-B and Ortho-A, respectively. The highest significant SC was obtained at 45 ppm using Ortho-B fertilizer with an increase of 232% followed by 217% and 157% for both Poly-B and Ortho-A, respectively. The Photosynthetic performance index (PItot) was also increased by 128.5%, 90.2% and 38.8% for Ortho-B, Ortho-A and Poly B, respectively. In addition, Poly-B showed a significant enhancement in roots and shoots biomass (49.4% and 156.8%, respectively) compared to C+. Fertilized and salt-stressed plants absorbed more phosphorus. The P content significantly increased mainly at 45 ppm of P. Positive correlations were found between phosphorus uptake, biomass, and photosynthetic yield. The increased photochemical activity could be due to a significant enhancement in light energy absorbed by the enhanced Chl antenna. The positive effect of adequate P fertilization under salt stress was therefore evident in durum wheat plants.

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Section: Discussionmentioning

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Photosynthetic performance and nutrient uptake under salt stress: Differential responses of wheat plants to contrasting phosphorus forms and rates

et al. 2022

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“…Widely applied measurements of chlorophyll a fluorescence help detect these first non-visible changes in photosynthetic apparatus functioning and structure ( Strasser et al., 2004b ; Goltsev et al., 2009 ; Goltsev et al., 2016 ; Kalaji et al., 2016 ; Kalaji et al., 2018 ; Samborska et al., 2019 ). Apart from being a simple, in vivo , and susceptible method, the fluorescence measurement provides a large amount of information on the physiological state of plants, which is essential for investigating and explaining physiological changes in certain environmental conditions like nutrient deficiency ( Živčák et al., 2014 ; Samborska et al., 2019 ; El-Mejjaouy et al., 2022 ; Lotfi et al., 2022 ), salt ( Kalaji et al., 2011b ; Dąbrowski et al., 2016 , Dąbrowski et al., 2017 ; Khatri and Rathore, 2022 ), temperature ( Yang et al., 2009 ; Kalaji et al., 2011a ; Oukarroum et al., 2016 ; Mihaljević et al., 2020 ) or drought stress ( Zivcak et al., 2008a ; Oukarroum et al., 2009 ; Goltsev et al., 2012 ; Goltsev et al., 2016 ; Kalaji et al., 2016 ; Kalaji et al., 2018 ). Many papers show that the measurement of chlorophyll fluorescence can potentially be used as a method of screening sensitive and tolerant genotypes of a particular plant species ( Oukarroum et al., 2007 ; Boureima et al., 2012 ; Guha et al., 2013 ; Jedmowski and Brüggemann, 2015 ; Banks, 2018 ; Chiango et al., 2021 ; Markulj Kulundžić et al., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

PEG-induced physiological drought for screening winter wheat genotypes sensitivity – integrated biochemical and chlorophyll a fluorescence analysis

Peršić

Ament²,

Dunić³

et al. 2022

Front. Plant Sci.

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This study aimed to screen different winter wheat genotypes at the onset of metabolic changes induced by water deficit to comprehend possible adaptive features of photosynthetic apparatus function and structure to physiological drought. The drought treatment was the most influential variable affecting plant growth and relative water content, and genotype variability determined with what intensity varieties of winter wheat seedlings responded to water deficit. PEG-induced drought, as expected, changed phenomenological energy fluxes and the efficiency with which an electron is transferred to final PSI acceptors. Based on the effect size, fluorescence parameters were grouped to represent photochemical parameters, that is, the donor and acceptor side of PSII (PC1); the thermal phase of the photosynthetic process, or the electron flow around PSI, and the chain of electrons between PSII and PSI (PC2); and phenomenological energy fluxes per cross-section (PC3). Furthermore, four distinct clusters of genotypes were discerned based on their response to imposed physiological drought, and integrated analysis enabled an explanation of their reactions’ specificity. The most reliable JIP-test parameters for detecting and comparing the drought impact among tested genotypes were the variable fluorescence at K, L, I step, and PITOT. To conclude, developing and improving screening methods for identifying and evaluating functional relationships of relevant characteristics that are useful for acclimation, acclimatization, and adaptation to different types of drought stress can contribute to the progress in breeding research of winter wheat drought-tolerant lines.

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“…Considering the crucial role of P in photosynthesis( Wu et al, 2006 ; Veneklaas et al, 2012 ), the enhanced P acquisition in response to PolyB-PSB Cs co-application can partly explain the improved photosynthesis parameters (chlorophyll fluorescence, CCI, PI, and Fv/Fm). Although there are no existing studies evaluating the PolyP-PSB co-application on photosynthesis performance, recent studies have reported that PolyP application positively impacts photosynthesis performance by improving P acquisition ( Chtouki et al, 2021 , 2022 ; El-Mejjaouy et al, 2022 ; Loudari et al, 2022b ). Similarly, several studies have found that PSB combined or not with P fertilizers can improve photosynthesis as an indirect plant growth promoting effect by optimizing P acquisition efficiency ( Dawwam et al, 2013 ; Zhou et al, 2017 ; Elhaissoufi et al, 2020 ; Seyahjani et al, 2020 ; De Zutter et al, 2022 ), which can be extrapolated to the findings of the present study.…”

Section: Discussionmentioning

confidence: 99%

Integrated use of polyphosphate and P-solubilizing bacteria enhanced P use efficiency and growth performance of durum wheat

et al. 2023

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Coupling phosphate-solubilizing bacteria (PSB) with P fertilizers, including polyphosphates (PolyP), was reported as eco-efficient approach to enhance P use efficiency. Although PSB have been recently reported to hydrolyze PolyP, the plant growth promoting mechanisms of PolyP-PSB co-application were not yet uncovered. This study aims to evaluate the effect of a PSB consortium (PSBCs) on growth, P use efficiency (PUE), and wheat yield parameters under PolyP (PolyB) application. Co-application of PolyB-PSBCs significantly enhanced wheat growth at 75 days after sowing (DAS) compared to 30 DAS. A significant increase in shoot dry biomass (47%), shoot inorganic P content (222%), PUE (91%), and root P absorption efficiency (RPAE, 99%) was noted compared to unfertilized plants. Similarly, the PolyB-PSBCs co-application enhanced morphological root traits at 30 DAS, while acid phosphatase activities (root and rhizosphere), RPAE, and PUE were significantly increased at 75 DAS. The improved wheat P acquisition could be attributed to a lower investment in root biomass production, and significant induction of acid phosphatase activity in roots and rhizosphere soil under PolyB-PSBCs co-application. Consequently, the PolyB-PSBCs co-application significantly improved aboveground performance, which is reflected by increased shoot nutrient contents (P 300%, K 65%), dry weight (54%), and number (50%) of spikes. Altogether, this study provides relevant evidence that co-application of PolyP-PSBCs can be an integrated and environmentally preferred P fertilization approach owing to the dual effects of PolyP and PSBCs on wheat PUE.

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How far can chlorophyll a fluorescence detect phosphorus status in wheat leaves (Triticum durum L.)

Cited by 14 publications

References 33 publications

Photosynthetic performance and nutrient uptake under salt stress: Differential responses of wheat plants to contrasting phosphorus forms and rates

Photosynthetic performance and nutrient uptake under salt stress: Differential responses of wheat plants to contrasting phosphorus forms and rates

PEG-induced physiological drought for screening winter wheat genotypes sensitivity – integrated biochemical and chlorophyll a fluorescence analysis

Integrated use of polyphosphate and P-solubilizing bacteria enhanced P use efficiency and growth performance of durum wheat

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