Article (Scientific journals)
How far can chlorophyll a fluorescence detect phosphorus status in wheat leaves (Triticum durum L.)
El-Mejjaouy, Yousra; Lahrir, Meryeme; Naciri, Rachida et al.
2021In Environmental and Experimental Botany, 194, p. 104762
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Keywords :
Chlorophyll a fluorescence; Fertilizer form; JIP-test parameters; Phosphorus; PLSR
Abstract :
[en] Phosphorus (P) is an essential macronutrient for crop growth and food production since it is involved in many biochemical processes in plants. Its deficiency causes physiological, biochemical, and morphological changes. These visual changes occur when the photosynthetic apparatus system is already damaged, and they are often irreversible. Consequently, it is necessary to develop novel methods for determining nutritional plant status early in the season for rapid intervention in crop production. This challenge can be tackled using emerging techniques for crop monitoring and rapid detection of stresses. Chlorophyll a fluorescence has proved its potential to detect early abiotic stresses effects on photosynthetic efficiency. Here, we evaluate the potential of this technique to assess phosphorus status in wheat leaves (Triticum durum L.), grown in different concentrations of phosphorus insured by different fertilizer forms (two orthophosphates and one polyphosphate). Results have shown a significant effect of the applied P concentration and fertilizer form on P leaves uptake at an early development stage and improved chlorophyll content index. Phosphorus level and fertilizer form were found to affect also the kinetics of the Chlorophyll a fluorescent transient (OJIP-transient) and related fluorescence parameters. Three predictive models were generated and compared. The results from partial least squares regression (PLSR) performed on fluorescence parameters with cross-validation (CV) were: the root mean square error and the determination coefficient of cross-validation (RMSECV = 0.095 and R2 = 0.67, respectively). The obtained model predicted phosphorus leaf content with RMSE of prediction (RMSEP) of 0.079 g 0.100 g−1 and R2 of 0.56. Results showed that the generated PLS predictive model using chlorophyll a fluorescence parameters has some potential to detect phosphorus status in wheat fresh leaves and can be highly informative about the photosynthetic apparatus state under P deficiency.
Disciplines :
Agriculture & agronomy
Author, co-author :
El-Mejjaouy, Yousra ;  Université de Liège - ULiège > TERRA Research Centre ; University Mohammed VI Polytechnic (UM6P) – AgoBioSciences, Plant Stress Physiology Laboratory, Benguerir, Morocco
Lahrir, Meryeme;  University Mohammed VI Polytechnic (UM6P) – AgoBioSciences, Plant Stress Physiology Laboratory, Benguerir, Morocco
Naciri, Rachida;  University Mohammed VI Polytechnic (UM6P) – AgoBioSciences, Plant Stress Physiology Laboratory, Benguerir, Morocco
Zeroual, Youssef;  University Mohammed VI Polytechnic (UM6P) – AgoBioSciences, Plant Stress Physiology Laboratory, Benguerir, Morocco
Mercatoris, Benoît  ;  Université de Liège - ULiège > TERRA Research Centre > Biosystems Dynamics and Exchanges (BIODYNE)
Dumont, Benjamin  ;  Université de Liège - ULiège > Département GxABT > Plant Sciences
Oukarroum, Abdallah;  University Mohammed VI Polytechnic (UM6P), High Throughput Multidisciplinary Research Laboratory, Benguerir, Morocco
Language :
English
Title :
How far can chlorophyll a fluorescence detect phosphorus status in wheat leaves (Triticum durum L.)
Publication date :
20 December 2021
Journal title :
Environmental and Experimental Botany
ISSN :
0098-8472
eISSN :
1873-7307
Publisher :
Elsevier B.V.
Volume :
194
Pages :
104762
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
OCP Group and Prayon
Funding text :
The SoilPhorLife Program sponsors, OCP Group and Prayon , are greatly acknowledged for funding this study.
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