Multichannel imaging for monitoring chemical composition and germination capacity of cowpea(Vigna unguiculata) seeds during development and maturation  

作　　者：Gamal ElMasry Nasser Mandour Yahya Ejeez Didier Demilly Salim Al-Rejaie Jerome Verdier Etienne Belin David Rousseau 

机构地区：[1]Agricultural Engineering Department,Faculty of Agriculture,Suez Canal University,Ismailia,Egypt [2]Groupe d’Etude et de Controle des Variétés et des Semences(GEVES),Station Nationale d’Essais de Semences(SNES),Beaucouze49071,Angers,France [3]Department of Pharmacology&Toxicology,College of Pharmacy,King Saud University,Saudi Arabia [4]Laboratoire Angevin de Recherche en Ingenierie des Systemes(LARIS),Universited’Angers,Angers,France [5]Institut National de la Recherche Agronomique(INRA),UMR1345 Institut de Recherche en Horticulture et Semences,BeaucouzéF-49071,Angers,France

出　　处：《The Crop Journal》2022年第5期1399-1411,共13页作物学报（英文版）

基　　金：supported by the STDF-IRD-AUF Joint Research Project No. 27755 provided by Egyptian Science and Technology Development Fund (STDF);the Distinguished Scientist Fellowship Program (DSFP) of King Saud University。

摘　　要：This study aimed to set a computer-integrated multichannel spectral imaging system as a high-throughput phenotyping tool for the analysis of individual cowpea seeds harvested at different developmental stages. The changes in germination capacity and variations in moisture, protein and different sugars during twelve stages of seed development from 10 to 32 days after anthesis were nondestructively monitored. Multispectral data at 20 discrete wavelengths in the ultraviolet, visible and near infrared regions were extracted from individual seeds and then modelled using partial least squares regression and linear discriminant analysis(LDA) models. The developed multivariate models were accurate enough for monitoring all possible changes occurred in moisture, protein and sugar contents with coefficients of determination in prediction R^(2) of 0.93, 0.80 and 0.78 and root mean square errors in prediction(RMSEP) of 6.045%, 2.236% and 0.890%, respectively. The accuracy of PLS models in predicting individual sugars such as verbascose and stachyose was reasonable with R~2 of 0.87 and 0.87 and RMSEP of 0.071%and 0.485%, respectively;but for the prediction of sucrose and raffinose the accuracy was relatively limited with R^(2) of 0.24 and 0.66 and RMSEP of 0.567% and 0.045%, respectively. The developed LDA model was robust in classifying the seeds based on their germination capacity with overall correct classification of96.33% and 95.67% in the training and validation datasets, respectively. With these levels of accuracy,the proposed multichannel spectral imaging system designed for single seeds could be an effective choice as a rapid screening and non-destructive technique for identifying the ideal harvesting time of cowpea seeds based on their chemical composition and germination capacity. Moreover, the development of chemical images of the major constituents along with classification images confirmed the usefulness of the proposed technique as a non-destructive tool for estimating the concentrations and spatial distributio

关 键 词：Multispectral imaging Multichannel imaging Chemical imaging Spectral analysis SEEDS COWPEA 

分 类 号：S643.4[农业科学—蔬菜学]