Leaf Compounds Research Articles

Chemometric Analysis for the Prediction of Biochemical Compounds in Leaves Using UV-VIS-NIR-SWIR Hyperspectroscopy.

Reflectance hyperspectroscopy is recognised for its potential to elucidate biochemical changes, thereby enhancing the understanding of plant biochemistry. This study used the UV-VIS-NIR-SWIR spectral range to identify the different biochemical constituents in Hibiscus and Geranium plants. Hyperspectral vegetation indices (HVIs), principal component analysis (PCA), and correlation matrices provided in-depth insights into spectral differences. Through the application of advanced algorithms-such as PLS, VIP, iPLS-VIP, GA, RF, and CARS-the most responsive wavelengths were discerned. PLSR models consistently achieved R2 values above 0.75, presenting noteworthy predictions of 0.86 for DPPH and 0.89 for lignin. The red-edge and SWIR bands displayed strong associations with pivotal plant pigments and structural molecules, thus expanding the perspectives on leaf spectral dynamics. These findings highlight the efficacy of spectroscopy coupled with multivariate analysis in evaluating the management of biochemical compounds. A technique was introduced to measure the photosynthetic pigments and structural compounds via hyperspectroscopy across UV-VIS-NIR-SWIR, underpinned by rapid multivariate PLSR. Collectively, our results underscore the burgeoning potential of hyperspectroscopy in precision agriculture. This indicates a promising paradigm shift in plant phenotyping and biochemical evaluation.

Computer-aided identification of bioactive compounds from Gongronema latifolium leaf with therapeutic potential against GSK3β, PTB1B and SGLT2

The modulation of certain molecular targets via small-molecule ligands has been regarded as a promising approach for the treatment and management of diabetes-related complications. Notable among these targets are the Glycogen synthase kinase (GSK3β), protein tyrosine phosphatase 1B (PTB1B), and sodium-glucose cotransporter 2 (SGLT2), whose inhibitions have been associated with high prognostic patients with diabetic related complications. However, inhibitors capable of exerting co-modulating effects on the three aforementioned proteins are lacking. Therefore, research aimed at the development of small molecule inhibitors capable of co-targeting these proteins remains unfaltering. Consequently, this study investigated the inhibitory potentials of Gongronema latifolium leaf's compounds against these proteins. Molecular docking was employed to screen 134 compounds against these targets; this gave rise to the identification of ten lead compounds (rutin, epigallocatechin-3-gallate, silymarin, hyperoside, luteolin, baicalin, rosmarinic acid, naringin, butein, and isoorientin) based on their high binding affinities. Subsequently, the toxicity profiles of the compounds were assessed while their bioactivities against the proteins were predicted using 2D quantitative structure-activity relationship (QSAR) models. Furthermore, density functional theory (DFT) calculations were employed to study the reactivity and stability of the aforementioned compounds. Ultimately, toxicity assessment revealed epigallocatechin-3-gallate and butein as the compounds with minimal toxicity, while DFT calculations revealed baicalin, rosmarinic acid, and butein as the most reactive among the lead compounds. Conclusively, this study provides insight into the discovery of phytocompounds with promising inhibitory potential that could facilitate the development of regimens for diabetes management after further in vitro and in vivo studies.

GCMS Analysis of Bioactives of Piper betle Linn. Leaf

Background: Piper betle Linn. (Piperaceae) is commonly known as “Green gold of India” due to its high commercial value. It is a Vedic plant used in various traditional system of medicine v.iz. Ayurveda system of medicine, Yunani system of medicine attributed to various pharmacological activities v.i.z. antioxidant, anti-inflammatory, analgesic, anti-fertility, antimutagenic etc. Objectives: The main objective of the present study is quantitative estimation of the various bioactive compounds present in leaf of P. betle L. (Bangla variety) by GC-MS analysis using head space method. Material and Methods: The vapor sample of leaf of P. betle L. was prepared by head space method for GCMS analysis. GCMS analysis was carried out using high resolution Thermo scientific TSQ 8000 Gas Chromatograph-Mass Spectrometer. Helium is used as carrier gas (99.999 %) with a constant flow rate of 1 ml/min. Total run time was 29.10 min. Results: GC-MS analysis revealed the presence of 16 bioactive compounds in leaf of P. betle L. Eugenol (29.13%), Bakuchiol (11.79%) and α-linalool (14.88%) are the chief bioactive compounds of leaf. Leaf has been also reported to contain a good percentage of various terpenoids like β- caryophyllene (7.69), α-muurolene (4.19), α-bisabolene (0.98), etc. Conclusion: From GC-MS analysis results it can be concluded that leaf of P. betle L. is a reservoir of valuable phenolic and susquiterpene compounds. Eugenol chief biomarker compound present leaf is a versatile remarkable molecule. Due to number of phytoconstituents P. betle L. leaf is recommended as plant of phytopharmaceutical importance.

Популяционная структура и дифференциация сибирских представителей рода Nitraria L. (Nitrariaceae) по составу и содержанию фенольных соединений в листьях

Популяционная структура и дифференциация сибирских представителей рода Nitraria L. (Nitrariaceae) по составу и содержанию фенольных соединений в листьях

Fluctuations in Volatile Compounds in Leaves, Stems, and Fruits of Growing Coriander (Coriandrum sativum L.) Plants

Research was conducted to clarify the variations in volatile compounds among different parts of the coriander plant with respect to its growth stages. At the seedling stage, the composition of volatile compounds in the leaves was quite similar to that in the stems, based on their pattern of gas chromatographic profiles (PGC). However, the PGC between leaves/stems changed as the plants grew and matured. Furthermore, a significant difference in the composition of volatile components developed between leaves and stems at the mature stage so that the PGC between them as well as with fruits diverged. The major volatile compounds of the stems/leaves were decanal, (E)-2-decenal, (E)-2-undecenal and 2-dodecenal, and (E)-2-tetradecenal, which have an oily, sweet or grassy odor. These five volatile compounds are barely detectable in fruits. The major volatile compound of the fruits was linalool, which has a sweet fresh scent, much like the flowers, whereas α-pinene, γ-terpinene, D-camphor and geraniol were hardly recognizable in stems and leaves. Coriander seedling has a grassy scent peculiar to the species that makes it a highly desirable culinary herb. This fresh green odor of heptanal, (E)-2-hexenal and octanal decreased in the leaves and stems with maturation.

ChemInform Abstract: CONTRIBUTION TO THE PHYTOCHEMISTRY OF GENUS GENTIANA. XXV. STUDY ON THE FLAVONIC AND XANTHONIC COMPOUNDS IN LEAVES OF GENTIANA X MARCAILHOUANA RY. NEW FLAVONIC CINNAMOYL‐C‐GLUCOSIDES

Chemischer InformationsdienstVolume 11, Issue 20 Organic Dyes ChemInform Abstract: CONTRIBUTION TO THE PHYTOCHEMISTRY OF GENUS GENTIANA. XXV. STUDY ON THE FLAVONIC AND XANTHONIC COMPOUNDS IN LEAVES OF GENTIANA X MARCAILHOUANA RY. NEW FLAVONIC CINNAMOYL-C-GLUCOSIDES MINH DUC LUONG MINH DUC LUONG, MINH DUC LUONG MINH DUC LUONGSearch for more papers by this authorP. FOMBASSO, P. FOMBASSOSearch for more papers by this authorA. JACOT-GUILLARMOD, A. JACOT-GUILLARMODSearch for more papers by this author MINH DUC LUONG MINH DUC LUONG, MINH DUC LUONG MINH DUC LUONGSearch for more papers by this authorP. FOMBASSO, P. FOMBASSOSearch for more papers by this authorA. JACOT-GUILLARMOD, A. JACOT-GUILLARMODSearch for more papers by this author First published: May 20, 1980 https://doi.org/10.1002/chin.198020259Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume11, Issue20May 20, 1980 RelatedInformation