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001-es BibID:	BIBFORM113446
035-os BibID:	(cikkazonosító)2198 (WoS)001004857700001 (Scopus)85161877781
Első szerző:	Akwu, Nneka Augustina
Cím:	Development and Biomechanics of Grewia lasiocarpa E. Mey. Ex Harv. Trichomes Exudate / Akwu, Nneka Augustina; Naidoo, Yougasphree; Singh, Moganavelli; Dewir, Yaser Hassan; Magyar-Tábori, Katalin; Lekhooa, Makhotso; Aremu, Adeyemi Oladapo
Dátum:	2023
ISSN:	2223-7747
Megjegyzések:	Grewia lasiocarpa E. Mey. Ex Harv., Malvaceae (forest raisin) is a tropical small tree or shrub valued for its ecological importance as well as its nutritional, antioxidant, antibacterial, and anti-cancer properties as well as its ecological and ornamental importance. Glandular and non-glandular trichomes are present on the fruits, stem bark and leaves of G. lasiocarpa and these trichomes are the first line of defense. They are important structures that plants use to combat biotic and abiotic stress. The development of G. lasiocarpa trichomes and the biomechanics of the exudates present in the glandular (capitate) trichome were investigated for the first time using advanced microscopy techniques [Scanning electron microscope (SEM) and Transmission electron microscope (TEM)]. The pressurized cuticular striations may play a role in the exudates' biomechanics, i.e., releasing secondary metabolites present in the capitate trichome, which was observed to be multidirectional. The presence of many glandular trichomes on a plant implies an increase in the amount of phytometabolites. A common precursor for the development of trichomes (non-glandular and glandular) was observed to be DNA synthesis associated with a periclinal cell division, thus the final fate of the cell is determined by cell cycle regulation, polarity, and expansion. The glandular trichomes of G. lasiocarpa are multicellular and polyglandular, while the non-glandular (glandless) trichomes are either single-celled or multicellular. Since, trichomes ♭house' phytocompounds of medicinal, nutritional, and agronomical benefits; the molecular and genetic study of the glandular trichomes of Grewia lasiocarpa will be beneficial to humanity.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Plants-Basel. - 12 : 11 (2023), p. 1-13. -
További szerzők:	Naidoo, Yougasphree Singh, Moganavelli Dewir, Yaser Hassan Magyarné Tábori Katalin (1965-) (kertészmérnök) Lekhooa, Makhotso Aremu, Adeyemi Oladapo
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001-es BibID:	BIBFORM116137
035-os BibID:	(cikkazonosító)1226 (WoS)001152827800001 (Scopus)85178271139
Első szerző:	Gangaram, Serisha
Cím:	Antioxidant and Cytotoxic Activities of Leaf and Stem Extracts of Barleria albostellata C.B. Clarke / Gangaram, Serisha; Naidoo, Yougasphree; Dewir, Yaser Hassan; Singh, Moganavelli; Daniels, Aliscia Nicole; Magyar-Tábori, Katalin; Mendler-Drienyovszki, Nóra
Dátum:	2023
ISSN:	2311-7524
Megjegyzések:	Barleria albostellata C.B. Clarke (Acanthaceae) is a plant native to South Africa and relatively few studies have been performed on it. Species in this genus are known for their ethnopharmacological and phyto-medicinal values. In this study, the total flavonoid and phenolic contents and the antioxidant and cytotoxic activities of hexane, chloroform, and methanol extracts were evaluated at five different concentrations (15, 30, 60, 120, and 240 mu g/mL). The antioxidant activity of the extracts of B. albostellata was assessed in vitro using the 2,2 '-diphenyl-1-picrylhydrazyl (DPPH) scavenging and ferric reducing antioxidant power (FRAP) assays, while the phenolic content was determined using a Folin-Ciocalteu assay. The extracts' cytotoxicity was established using a 3-[(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide] (MTT) assay in human embryonic kidney (HEK293), cervical cancer (HeLa), and breast adenocarcinoma (MCF-7) cell lines. Methanolic leaf extracts had the highest total flavonoid content (42.39 +/- 1.14 mg GAE/g DW) compared to other solvents. Additionally, the total phenolic content was the greatest in the methanol leaf extract (6.05 +/- 0.09 GAE/g DW), followed by the methanol stem extracts (2.93 +/- 0.73 GAE/g DW). The methanolic leaf and stem extract concentrations needed for 50% inhibition (DPPH) were 16.95 mu g/mL and 14.27 mu g/mL, respectively, whereas for FRAP, the reducing powers of all extracts were considerably lower than the ascorbic acid standard. The IC50 values of extracts tested in the three cell lines were >63 mu g/mL. According to the findings of our study, the leaves and stems of B. albostellata are rich in several bioactive compounds that may be a possible source of natural antioxidants and may have the potential to treat certain diseases. The extraction of the bioactive compounds from the leaves and stems of B. albostellata using bioassay-guided fractionation and the assessment of their safety will be essential for further investigations into this species in the search of potential novel therapeutic drug leads. To the best of our knowledge, this is the first report of the cytotoxic activities of leaf and stem extracts of Barleria albostellata.
Tárgyszavak:	Agrártudományok Növénytermesztési és kertészeti tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Horticulturae. - 9 : 11 (2023), p. 1-18. -
További szerzők:	Naidoo, Yougasphree Dewir, Yaser Hassan Singh, Moganavelli Daniels, Aliscia Nicole Magyarné Tábori Katalin (1965-) (kertészmérnök) Mendlerné Drienyovszki Nóra (1977-) (agrármérnök)
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001-es BibID:	BIBFORM113691
035-os BibID:	(cikkazonosító)732 (WoS)001038750200001 (Scopus)85166316242
Első szerző:	Gangaram, Serisha
Cím:	Micromorphology of Barleria albostellata (Grey Barleria) Flower and Pollen Grains / Gangaram, Serisha; Naidoo, Yougasphree; Dewir, Yaser Hassan; Singh, Moganavelli; Magyar-Tábori, Katalin
Dátum:	2023
ISSN:	2311-7524
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Horticulturae. - 9 : 7 (2023), p. 1-11. -
További szerzők:	Naidoo, Yougasphree Dewir, Yaser Hassan Singh, Moganavelli Magyarné Tábori Katalin (1965-) (kertészmérnök)
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001-es BibID:	BIBFORM113693
035-os BibID:	(cikkazonosító)2312 (WoS)001015801700001 (Scopus)85163964515
Első szerző:	Rambau, Unarine
Cím:	The Foliar Anatomy and Micromorphology of Cyphostemma hypoleucum (Vitaceae) / Rambau, Unarine; Naidoo, Yougasphree; Sadashiva, Channangihalli Thimmegowda; Baijnath, Himansu; Dewir, Yaser Hassan; Magyar-Tábori, Katalin
Dátum:	2023
ISSN:	2223-7747
Megjegyzések:	Cyphostemma hypoleucum (Harv.) Desc. ex Wild & R.B. Drumm is a perennial climber, indigenous to Southern Africa, and belongs to the Vitaceae. Although there have been many studies of Vitaceae micromorphology, only a few taxa have been described in detail. This study aimed to characterize the micro-morphology of the leaf indumentum and determining its possible functions. Stereo microscope, scanning electron microscope (SEM), and transmission electron microscope (TEM) were used to produce images. Micrographs of stereomicroscopy and SEM showed the presence of non-glandular trichomes. In addition, pearl glands were observed on the abaxial surface using a stereo microscope and SEM. These were characterized by a short stalk and a spherical- shaped head. The density of trichomes decreased on both surfaces of leaves as the leaf expanded. Idioblasts that contained raphide crystals were also detected in tissues. The results obtained from various microscopy techniques confirmed that non-glandular trichomes serve as the main external appendages of the leaves. Additionally, their functions may include serving as a mechanical barrier against environmental factors such as low humidity, intense light, elevated temperatures, as well as herbivory and insect oviposition. Our results may also be added to the existing body of knowledge with regard to microscopic research and taxonomic applications.
Tárgyszavak:	Természettudományok Biológiai tudományok idegen nyelvű folyóiratközlemény külföldi lapban folyóiratcikk
Megjelenés:	Plants-Basel. - 12 : 12 (2023), p. 1-14. -
További szerzők:	Naidoo, Yougasphree Sadashiva, Channangihalli Thimmegowda Baijnath, Himansu Dewir, Yaser Hassan Magyarné Tábori Katalin (1965-) (kertészmérnök)
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