Modification du pH vacuolaire des cellules épidermiques foliaires de Solanum dulcamara soumises à l'action d'un acarien cécidogène

1982 ◽  
Vol 60 (12) ◽  
pp. 2882-2888 ◽  
Author(s):  
Evelyne Westphal
Keyword(s):  
Cell Wall ◽  
Leaf Epidermis ◽  
Solanum Dulcamara ◽  
Injured Cell ◽  
Wall Perforation ◽  
Vacuolar Ph

Leaf epidermis cells of Solanum dulcamara cultured for several hours show, after cell wall perforation by Eriophyes cladophthirus, an increase of the vacuolar pH (≥8) both in susceptible and resistant plants. This reaction is more rapid on susceptible plants and the injured cell remains alive. In contrast, on resistant plants, the reaction starts later and the injured cell collapses and dies.

KARAKTERISTIK STRUKTUR ANATOMI DINDING SEL JABON MERAH (Anthocephalus macrophyllus) PROVENANSI WAJO

PERENNIAL ◽  
2019 ◽  
Vol 15 (1) ◽  
Author(s):  
Nurul Muhlisah Mompewa ◽  
Andi Detti Yunianti ◽  
Siti Halimah Larekeng
Keyword(s):  
Cell Wall ◽  
Cell Walls ◽  
Microfibril Angle ◽  
Perforation Plate ◽  
Teak Wood ◽  
Perforation Plates ◽  
Wall Perforation

Characteristics of anatomy structure cell walls can be used as a reference to determine the quality of wood, especially in the final product. Variability anatomy of wood is varies greatly between species, parts of the stem and place of growth and provenance. For the purpose of the study, teak wood samples from Wajo provenance. This study aims to identify the structure anatomy characteristics cell wall of jabon merah from Wajo provenance. The structure anatomy cell wall observed were a microfibril angle (MFA), a pit in cell wall, perforation plate, and tylosis. Results showed that the structure anatomy cell wall characteristics jabon merah from Wajo provenance had a MFA values of 22.21°,intervessel pits polygonal alternating, scalariform perforation plates, and have a tylosis in the vessel.

Light and electron microscopy of the spermogonial stage of Gymnoconia peckiana, one of the causes of orange rust of Rubus

Botany ◽  
2008 ◽  
Vol 86 (5) ◽  
pp. 533-538 ◽  
Author(s):  
Charles W. Mims ◽  
Elizabeth A. Richardson
Keyword(s):  
Cell Wall ◽  
Epidermal Cell ◽  
Leaf Surface ◽  
Light And Electron Microscopy ◽  
Epidermal Cells ◽  
Wall Material ◽  
Cell Wall Material ◽  
Leaf Epidermis ◽  
Single Nucleus ◽  
Epidermal Cell Wall

Hyphae of Gymnoconia peckiana (Howe in Peck) Trotter spread from infected Rubus argutus Link. stems into leaf primordia where they proliferated in an intercellular fashion as leaves differentiated. Hyphae were septate, and each compartment appeared to contain a single nucleus. Hyphae gave rise to numerous haustoria that resembled the monokaryotic haustoria of other rust fungi. Hyphae located immediately adjacent to the upper and lower leaf epidermis gave rise to spermogonial initials. Each initial consisted of a small group of tightly packed hyphae that developed in an intercellular space adjacent to the epidermis. As an initial enlarged, the proliferating hyphae pushed their way between, as well as into, epidermal cells. Invaded epidermal cells soon died. A layer of spermatiophores then developed within each young spermogonium and appeared to push the epidermal cell wall material and leaf cuticle covering the spermogonium out from the leaf surface. Once mature, spermatiophores gave rise to a succession of uninucleate spermatia that emerged from the tip of each spermatiophore. Spermatia initially accumulated beneath the layer of epidermal cell wall material and cuticle that covered the developing spermogonium and appeared to push this layer further out from the leaf surface until it ruptured. A few receptive hyphae were observed in mature spermogonia.

LUM-driven micromanipulator for cell wall perforation

2015 ◽  
Vol 5 (2/3) ◽  
pp. 86 ◽  
Author(s):  
Ran Ran Geng ◽  
Zhi Yuan Yao ◽  
James K. Mills
Keyword(s):  
Cell Wall ◽  
Wall Perforation

scholarly journals Knockout of the alanine racemase gene inLactobacillus plantarumresults in septation defects and cell wall perforation

2004 ◽  
Vol 233 (1) ◽  
pp. 131-138 ◽  
Author(s):  
Emmanuelle Palumbo ◽  
Christine F. Favier ◽  
Marie Deghorain ◽  
Pier Sandro Cocconcelli ◽  
Corinne Grangette ◽  
...  
Keyword(s):  
Cell Wall ◽  
Alanine Racemase ◽  
Wall Perforation

scholarly journals Glycerol‐3‐phosphate acyltransferase 6 controls filamentous pathogen interactions and cell wall properties of the tomato and Nicotiana benthamiana leaf epidermis

2019 ◽  
Vol 223 (3) ◽  
pp. 1547-1559 ◽  
Author(s):  
Stuart Fawke ◽  
Thomas A. Torode ◽  
Anna Gogleva ◽  
Eric A. Fich ◽  
Iben Sørensen ◽  
...  
Keyword(s):  
Cell Wall ◽  
Nicotiana Benthamiana ◽  
Leaf Epidermis ◽  
Wall Properties ◽  
Cell Wall Properties

scholarly journals A study of epidermal leaf anatomy of 18 Euphorbia taxa from Kerman Province, Iran

Biologija ◽  
2017 ◽  
Vol 63 (2) ◽  
Author(s):  
Seyed Mehdi Talebi ◽  
Mitra Noori ◽  
Habibeh Afzali Naniz
Keyword(s):  
Cell Wall ◽  
Epidermal Cell ◽  
Leaf Anatomy ◽  
Cell Shape ◽  
Leaf Epidermis ◽  
Abaxial Surface ◽  
Leaf Epidermal Cell ◽  
Leaf Surfaces ◽  
Cell Shapes ◽  
Different Parts

Euphorbia is the largest genus of Euphorbiaceae widely distributed all over the world. The genus members grow naturally in different parts of Iran and nearly 96 species of Euphorbia have been listed in the country. Investigations show that the traits of foliar epidermis have taxonomic values. That is why the features of epidermal leaf anatomy of 18 Euphorbia taxa were studied in the present study. Plant samples were collected from Kerman Province, Iran, and identified using available references. Semi-permanent slides were prepared of adaxial and abaxial leaf epidermis. Then the slides were studied using light microscopy and some epidermal leaf anatomy characteristics stomata types, trichomes, the shape and type of epidermal cell, and their walls were examined. Photomicrographs were taken from each sample. Results showed that stomata type were stable among the species. Not only leaf epidermal cell shapes differed between the taxa, but also in some species they varied between the abaxial and adaxial surfaces. These conditions hold true for cell wall patterns. Some of the studied taxa had simple and uniseriate trichomes on the epidermal surfaces, in most of them trichomes were present on both leaf surfaces, while in one species trichomes were seen on the abaxial surface. Our findings confirmed that some of the anatomical traits, such as the absence or presence of trichomes, epidermal cell shape, and anticlinal cell wall patterns had taxonomic value and are useful in the identification of taxa.

Changes in leaves of susceptible and resistant Solanum dulcamara infested by the gall mite Eriophyes cladophthirus (Acarina, Eriophyoidea)

1981 ◽  
Vol 59 (5) ◽  
pp. 875-882 ◽  
Author(s):  
E. Westphal ◽  
R. Bronner ◽  
M. Le Ret
Keyword(s):  
Hypersensitive Response ◽  
Cell Walls ◽  
Polyphenolic Compounds ◽  
Epidermal Cells ◽  
Solanum Dulcamara ◽  
Injured Cell ◽  
Feeding Sites ◽  
Gall Mite ◽  
Necrotic Region

Eriophyes cladophthirus perforates the wall of epidermis cells during feeding on young susceptible leaves and provokes the formation of cone-shaped feeding punctures. Callose is detected near the puncture after 20 min and the injured cells are transformed into nutritive cells. Nutritive cells are induced near the feeding sites on susceptible plants, whereas only necrotic cells appear near feeding sites on resistant plants.Mites feeding on resistant plants rapidly initiate a hypersensitive response detectable after 10 min on injured epidermal cells which then leads to severe necrosis of surrounding tissues after 1 h. No typical feeding punctures or callose deposits appear on injured cell walls. Polyphenolic compounds are detected in the necrotic region after 4 h.

Cell Wall Perforation in Laticifers of Papaver somniferum L.

1977 ◽  
Vol 138 (4) ◽  
pp. 402-408 ◽  
Author(s):  
Craig L. Nessler ◽  
Paul G. Mahlberg
Keyword(s):  
Cell Wall ◽  
Papaver Somniferum ◽  
Wall Perforation

Influence of Cell Wall Composition on the Fossilisation of Bacteria and the Implications for the Search for Early Life Forms

1997 ◽  
Vol 161 ◽  
pp. 491-504 ◽  
Author(s):  
Frances Westall
Keyword(s):  
Cell Wall ◽  
Life Forms ◽  
Cation Binding ◽  
Positive Bacterium ◽  
Gram Positive ◽  
Gram Positive Bacteria ◽  
Transmission Electron ◽  
Hydrothermal Sediments ◽  
Identification Of Bacteria ◽  
The Difference

AbstractThe oldest cell-like structures on Earth are preserved in silicified lagoonal, shallow sea or hydrothermal sediments, such as some Archean formations in Western Australia and South Africa. Previous studies concentrated on the search for organic fossils in Archean rocks. Observations of silicified bacteria (as silica minerals) are scarce for both the Precambrian and the Phanerozoic, but reports of mineral bacteria finds, in general, are increasing. The problems associated with the identification of authentic fossil bacteria and, if possible, closer identification of bacteria type can, in part, be overcome by experimental fossilisation studies. These have shown that not all bacteria fossilise in the same way and, indeed, some seem to be very resistent to fossilisation. This paper deals with a transmission electron microscope investigation of the silicification of four species of bacteria commonly found in the environment. The Gram positiveBacillus laterosporusand its spore produced a robust, durable crust upon silicification, whereas the Gram negativePseudomonas fluorescens, Ps. vesicularis, andPs. acidovoranspresented delicately preserved walls. The greater amount of peptidoglycan, containing abundant metal cation binding sites, in the cell wall of the Gram positive bacterium, probably accounts for the difference in the mode of fossilisation. The Gram positive bacteria are, therefore, probably most likely to be preserved in the terrestrial and extraterrestrial rock record.

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