scholarly journals The Occurrence of Transfer Cells in the Vascular Tissues of the Coleoptilar Node of Wheat

1970 ◽  
Vol 23 (3) ◽  
pp. 709 ◽  
Author(s):  
TP O'brien ◽  
S Zee ◽  
JG Swift
Keyword(s):  
Short Distance ◽  
Vascular Tissue ◽  
Embryo Sac ◽  
Transfer Cells ◽  
Large Sample ◽  
Vascular Tissues ◽  
Wall Ingrowths ◽  
Distance Transport

Wooding and Northcote (1965), Gunning, Pate, and Briarty (1968), Gunning and Pate (1969), and Pate and Gunning (1969) have drawn attention recently to the presence of cells with wall ingrowths in a number of sites in plants at which one might expect short-distance transport of considerable quantities of solutes. Gunning and Pate (1969) suggested that these cells be called "transfer cells" and surveyed their distribution in the leaves of a large sample of Angiosperms. These cells have not been found in the leaves of any grasses, and they have been demonstrated in the Gramineae only in the embryo sac of maize (Diboll 1968). In this paper, transfer cells are illustrated in the vascular tissue at the coleoptilar node in wheat, and the possible functions of these cells at this site are discussed.

scholarly journals Structural character of sorghum endosperm transfer cells and their relationship with embryo and endosperm

2010 ◽  
Vol 1 (2) ◽  
pp. 15 ◽  
Author(s):  
Yankun Zheng ◽  
Zhong Wang
Keyword(s):  
Sorghum Bicolor ◽  
Vascular Tissue ◽  
Transfer Cells ◽  
Experimental Results ◽  
Epithelial Layer ◽  
Wall Ingrowths ◽  
Endosperm Transfer Cells ◽  
Structural Character ◽  
Sorghum Bicolor L

Endosperm transfer cells mainly occur in the epithelial layer of the endosperm and transport the nutrient unloaded by the maternal vascular tissue. They have wall ingrowths that can facilitate solute transportation. Here we report our further investigation of endosperm transfer cells in sorghum (Sorghum bicolor L. Moench). We observed endosperm transfer cells, embryo, and endosperm with different kinds of microscopes. Our experimental results showed that the distribution and configuration of endosperm transfer cells were fit for solute transportation, and they had a tight relationship with the embryo and endosperm.

scholarly journals Apulo-Calabrese and Crossbreed Pigs Show Different Physiological Response and Meat Quality Traits after Short Distance Transport

Animals ◽  
2018 ◽  
Vol 8 (10) ◽  
pp. 177 ◽  
Author(s):  
Gizella Aboagye ◽  
Stefania Dall’Olio ◽  
Francesco Tassone ◽  
Martina Zappaterra ◽  
Salvatore Carpino ◽  
...  
Keyword(s):  
Meat Quality ◽  
Short Distance ◽  
Blood Parameters ◽  
Quality Traits ◽  
Large White ◽  
Meat Quality Traits ◽  
Genetic Types ◽  
Alkaline Phosphate ◽  
Distance Transport ◽  
Sodium And Potassium

Despite the increasing interest in the welfare of animals during transport, very little is known on the response of local pig breeds to the transport procedures. This study aims to compare the effect of short journey on behaviour, blood parameters, and meat quality traits in 51 Apulo-Calabrese and 52 crossbreed [Duroc × (Landrace × Large White)] pigs. All the animals were blood sampled five days before delivery (basal condition) and at exsanguination for the analysis of creatine kinase, cortisol, glucose, lactate, albumin, albumin/globulin, total protein, urea, creatinine, aspartate aminotransferase (AST), alanine aminotransferase, alkaline phosphate, sodium, and potassium. Post mortem pH, color, drip loss, cooking loss, and Warner-Bratzler shear force were measured at different times in longissimus thoracis samples. Univariate and multivariate analyses showed that glucose, albumin/globulin, urea, and AST at exsanguination were influenced by the genetic type. Apulo-Calabrese showed the highest increase in blood values of lactate, creatinine, sodium and potassium after the short distance transport. Behavioural occurrences were similar in both genetic types during unloading and lairage. Small differences were observed for meat quality although significantly higher a* and lower L* were found in Apulo-Calabrese pigs, showing meat with a deeper red colour than crossbreeds.

The morphology of grain abscission in Zizania aquatica

1980 ◽  
Vol 58 (21) ◽  
pp. 2269-2273 ◽  
Author(s):  
H. B. Hanten ◽  
G. E. Ahlgren ◽  
J. B. Carlson
Keyword(s):  
Wild Rice ◽  
Cell Walls ◽  
Vascular Tissue ◽  
Embryo Sac ◽  
Middle Lamella ◽  
Abscission Zone ◽  
Rice Grains ◽  
Zizania Aquatica ◽  
Parenchyma Cells ◽  
Anatomical Evidence

The anatomical development of the abscission zone in grains of Zizania aquatica L. was correlated with development of the embryo. The abscission zone is well developed when the embryo sac is mature. Soon after pollination, the first anatomical evidence of abscission appears as plasmolysis of the separation layer parenchyma cells. This is followed by separation of the layers by dissolution of the middle lamella and fragmentation of cell walls. Persistence of intact vascular tissue and presence of a surrounding cone-shaped mass of lignified cells may be involved in abscission of wild rice grains.

Structure and ontogeny of Alnus crispa – Alpova diplophloeus ectomycorrhizae

1986 ◽  
Vol 64 (1) ◽  
pp. 177-192 ◽  
Author(s):  
H. B. Massicotte ◽  
R. L. Peterson ◽  
C. A. Ackerley ◽  
Y. Piché
Keyword(s):  
Structural Changes ◽  
Hyphal Growth ◽  
Root Surface ◽  
Epidermal Cells ◽  
Transfer Cells ◽  
Wall Ingrowths ◽  
Alnus Crispa ◽  
Hartig Net ◽  
Fungal Hyphae ◽  
Branching System

Alnus crispa (Ait.) Pursh seedlings were grown in plastic pouches and inoculated with Frankia to induce nodules and subsequently with Alpova diplophloeus (Zeller & Dodge) Trappe & Smith to form ectomycorrhizae. The earliest events in ectomycorrhiza formation involved contact of the root surface by hyphae, hyphal proliferation to form a thin mantle, and further hyphal growth to form a thick mantle. Structural changes in the host, the mycosymbiont, and the fungus–epidermis interface were described at various stages in the ontogeny of ectomycorrhizae. Fungal hyphae in contact with epidermal cells in the regions of intercellular penetration and paraepidermal Hartig net developed numerous rough endoplastic reticulum cisternae. In more proximal regions of the mycorrhiza, these gradually became fewer in number and smooth. A complicated labyrinthine wall branching system also developed in the fungus in these regions. Concurrently, epidermal cells formed wall ingrowths in regions adjacent to Hartig net hyphae. There was a gradient in the formation of these epidermal transfer cells as the mycorrhiza developed, and an additional deposition of secondary cell wall over the wall ingrowths occurred as transfer cells senesced. Nonmycorrhizal control roots did not develop epidermal wall ingrowths. Electron-dense material, which was also autofluorescent, was deposited in the outer tangential walls of the exodermis contiguous to the paraepidermal Hartig net.

scholarly journals Tracking of Short Distance Transport Pathways in Biological Tissues by Ultra-Small Nanoparticles

2018 ◽  
Vol 6 ◽  
Author(s):  
Jana S. Segmehl ◽  
Alessandro Lauria ◽  
Tobias Keplinger ◽  
John K. Berg ◽  
Ingo Burgert
Keyword(s):  
Short Distance ◽  
Biological Tissues ◽  
Transport Pathways ◽  
Distance Transport ◽  
Small Nanoparticles
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