Fungal Genera from Fossilized-leaf Surfaces

2014 ◽  
pp. 9-24 ◽  
Keyword(s):  
Leaf Surfaces

The effect of physico-chemical treatment in reducing Listeria monocytogenes biofilms on lettuce leaf surfaces

Biofouling ◽  
2021 ◽  
pp. 1-13
Author(s):  
Md. Furkanur Rahaman Mizan ◽  
Hye Ran Cho ◽  
Md. Ashrafudoulla ◽  
Junbin Cho ◽  
Md. Iqbal Hossain ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Chemical Treatment ◽  
Physico Chemical ◽  
Leaf Surfaces

scholarly journals Inhibition of Escherichia coli O157:H7 and Salmonella enterica Isolates on Spinach Leaf Surfaces Using Eugenol-Loaded Surfactant Micelles

Foods ◽  
2019 ◽  
Vol 8 (11) ◽  
pp. 575
Author(s):  
Songsirin Ruengvisesh ◽  
Chris R. Kerth ◽  
T. Matthew Taylor
Keyword(s):  
Escherichia Coli ◽  
Salmonella Enterica ◽  
Limit Of Detection ◽  
Sodium Dodecyl ◽  
Microbial Pathogens ◽  
Escherichia Coli O157 ◽  
Human Pathogens ◽  
Surfactant Micelles ◽  
Leaf Surfaces ◽  
Spinach Leaf

Spinach and other leafy green vegetables have been linked to foodborne disease outbreaks of Escherichia coli O157:H7 and Salmonella enterica around the globe. In this study, the antimicrobial activities of surfactant micelles formed from the anionic surfactant sodium dodecyl sulfate (SDS), SDS micelle-loaded eugenol (1.0% eugenol), 1.0% free eugenol, 200 ppm free chlorine, and sterile water were tested against the human pathogens E. coli O157:H7 and Salmonella Saintpaul, and naturally occurring microorganisms, on spinach leaf surfaces during storage at 5 °C over 10 days. Spinach samples were immersed in antimicrobial treatment solution for 2.0 min at 25 °C, after which treatment solutions were drained off and samples were either subjected to analysis or prepared for refrigerated storage. Whereas empty SDS micelles produced moderate reductions in counts of both pathogens (2.1–3.2 log10 CFU/cm2), free and micelle-entrapped eugenol treatments reduced pathogens by >5.0 log10 CFU/cm2 to below the limit of detection (<0.5 log10 CFU/cm2). Micelle-loaded eugenol produced the greatest numerical reductions in naturally contaminating aerobic bacteria, Enterobacteriaceae, and fungi, though these reductions did not differ statistically from reductions achieved by un-encapsulated eugenol and 200 ppm chlorine. Micelles-loaded eugenol could be used as a novel antimicrobial technology to decontaminate fresh spinach from microbial pathogens.

Flavonoid aglycones from the leaf surfaces of someLabiatae species

1990 ◽  
Vol 173 (3-4) ◽  
pp. 109-118 ◽  
Author(s):  
F. A. Tom�s-Barber�n ◽  
E. Wollenweber
Keyword(s):  
Flavonoid Aglycones ◽  
Leaf Surfaces

Spreading of spray mixtures on leaf surfaces: I. relative effectiveness of various physico-chemical predictors

1990 ◽  
Vol 28 (4) ◽  
pp. 419-429 ◽  
Author(s):  
Henry A. Abbott ◽  
Louis P. Van Dyk ◽  
Nathanaël Grobbelaar
Keyword(s):  
Relative Effectiveness ◽  
Physico Chemical ◽  
Leaf Surfaces

THE ELECTRON MICROSCOPY OF LEAF SURFACES PRESERVED IN PEAT

1966 ◽  
Vol 44 (4) ◽  
pp. 421-427 ◽  
Author(s):  
John M. Stewart ◽  
Edward A. C. Follett
Keyword(s):  
Electron Microscopy ◽  
Cell Wall ◽  
Calluna Vulgaris ◽  
Surface Features ◽  
Peat Deposits ◽  
Leaf Surfaces ◽  
Definition Of ◽  
Peat Formation ◽  
Physical And Chemical ◽  
Cuticular Surface

Phragmites communis, Eriophorum vaginatum, Calluna vulgaris, and Sphagnum palustre are representative of plants whose remains are frequently encountered in Scottish peat deposits. The effects of preservation in peat on the surface features of their leaves were followed by electron microscopy. Wax projections were observed on the surfaces of mature living leaves of Phragmites and Eriophorum but not on Calluna or Sphagnum. Details of cell wall outlines and stomata (or pores) were clearly defined in Phragmites, Eriophorum, and Sphagnum, but obscured in Calluna. The previous year's leaves differed by displaying a general absence of wax projections, an erosion of the cuticular surface, which took the form of either a loss in definition of the cell wall outlines or a definite etching of the surface, and the presence of numerous microorganisms. The surface features of preserved leaves exhibited to a greater degree this erosion of cell wall outline and cuticular surface. This preliminary study has indicated that major alterations in the submicroscopic features of cuticularized leaf surfaces occur at the leaf litter stage. The primary agents responsible for this degradation would appear to be microorganisms in conjunction with the physical and chemical processes of peat formation.

scholarly journals Evolution at the tips: Asclepias phylogenomics and new perspectives on leaf surfaces

2018 ◽  
Vol 105 (3) ◽  
pp. 514-524 ◽  
Author(s):  
Mark Fishbein ◽  
Shannon C. K. Straub ◽  
Julien Boutte ◽  
Kimberly Hansen ◽  
Richard C. Cronn ◽  
...  
Keyword(s):  
Leaf Surfaces
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