scholarly journals Nutrient stoichiometry in winter wheat: Element concentration pattern reflects developmental stage and weather

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
M. Weih ◽  
F. Pourazari ◽  
G. Vico
Keyword(s):  
Winter Wheat ◽  
Developmental Stage ◽  
Element Concentration ◽  
Nutrient Stoichiometry ◽  
Concentration Pattern

Effects of Elevated CO2 Level and N and P Supplies on two Winter Wheat Varieties in the Early Developmental Stage

2000 ◽  
Vol 28 (1-2) ◽  
pp. 123-130 ◽  
Author(s):  
Szilvia Bencze ◽  
Ottó Veisz ◽  
Tibor Janda ◽  
Zoltán Bedő
Keyword(s):  
Winter Wheat ◽  
Developmental Stage ◽  
Elevated Co2 ◽  
Early Developmental Stage ◽  
Wheat Varieties ◽  
Co2 Level ◽  
Early Developmental ◽  
Winter Wheat Varieties

Developmental stage dependency of the effect of drought stress on photosynthesis in winter wheat (Triticum aestivum L.) varieties

2013 ◽  
Vol 61 (1) ◽  
pp. 13-21 ◽  
Author(s):  
A. Fábián ◽  
K. Jäger ◽  
B. Barnabás
Keyword(s):  
Drought Stress ◽  
Winter Wheat ◽  
Developmental Stage ◽  
Net Photosynthesis ◽  
Triticum Aestivum L ◽  
Meiotic Stage ◽  
Wheat Varieties ◽  
Drought Tolerant ◽  
Reproductive Life ◽  
Significant Yield

Drought stress frequently occurs in the reproductive stage of wheat, causing significant yield loss. To study the developmental stage dependency of the effect of drought stress on photosynthesis, plants of the drought-tolerant Plainsman V and sensitive Cappelle Desprez winter wheat varieties were grown in phytotron chambers and subjected to water withholding during three phenophases of reproductive development: meiosis, anthesis and early seed development (ESD).Stomatal conductance (gs) and net photosynthesis (Anet) showed similar characteristics. Meiotic-stage drought only decreased the values of Cappelle Desprez significantly. Stressed Plainsman V showed a significantly smaller reduction and better regeneration for these parameters at anthesis. The decreases in gs and Anet were similar in both varieties when drought was applied during ESD. Studies on the intercellular CO2 concentration (Ci) inflexion point implied that metabolic impairment was less typical of stressed Plainsman V than of Cappelle Desprez at meiosis and anthesis. The quantum efficiency of PSII (ΦPSII) did not decline in either genotype during meiotic-stage drought. Stressed Plainsman V showed significantly higher ΦPSII values compared to Cappelle Desprez at anthesis. During ESD, the values for stressed plants of both genotypes decreased to a similar extent.The results indicate that the effect of drought stress on photosynthesis shows developmental stage dependency during the reproductive life cycle of wheat.

Changes in corneocyte element concentrations occur in skin inner stratum corneum

1990 ◽  
Vol 48 (2) ◽  
pp. 146-147
Author(s):  
R. R. Warner
Keyword(s):  
Stratum Corneum ◽  
Human Skin ◽  
Element Concentration ◽  
Skin Barrier ◽  
Barrier Properties ◽  
Brick Wall ◽  
Inorganic Elements ◽  
Dry Skin ◽  
Skin Biopsies ◽  
Intercellular Lipid

Keratinocytes undergo maturation during their transit through the viable layers of skin, and then abruptly transform into flattened, anuclear corneocytes that constitute the cellular component of the skin barrier, the stratum corneum (SC). The SC is generally considered to be homogeneous in its structure and barrier properties, and is often shown schematically as a featureless brick wall, the “bricks” being the corneocytes, the “mortar” being intercellular lipid. Previously we showed the outer SC was not homogeneous in its composition, but contained steep gradients of the physiological inorganic elements Na, K and Cl, likely originating from sweat salts. Here we show the innermost corneocytes in human skin are also heterogeneous in composition, undergoing systematic changes in intracellular element concentration during transit into the interior of the SC.Human skin biopsies were taken from the lower leg of individuals with both “good” and “dry” skin and plunge-frozen in a stirred, cooled isopentane/propane mixture.

Molecular cloning and characterization of vernalization-related (ver) genes in winter wheat

1994 ◽  
Vol 92 (3) ◽  
pp. 511-515 ◽  
Author(s):  
Kang Chong ◽  
Li-Ping Wang ◽  
Ke-Hui Tan ◽  
Hua-Liang Huang ◽  
Hou-Guo Liang
Keyword(s):  
Winter Wheat ◽  
Molecular Cloning

Determination of developmental stage to obtain high frequencies of embryogenic microspores in Brassica napus

1992 ◽  
Vol 84 (3) ◽  
pp. 417-424 ◽  
Author(s):  
Cheryl A. Telmer ◽  
Daina H. Simmonds ◽  
William Newcomb
Keyword(s):  
Brassica Napus ◽  
Developmental Stage ◽  
High Frequencies

Neural correlates of postformal stages of reasoning: Biological determinants of developmental stage.

2016 ◽  
Vol 21 (1) ◽  
pp. 33-43 ◽  
Author(s):  
Sofia Ribeirinho Leite ◽  
Cory David Barker ◽  
Marc G. Lucas
Keyword(s):  
Developmental Stage ◽  
Neural Correlates ◽  
Biological Determinants

A quantitative behavioral model of developmental stage based upon the model of hierarchical complexity.

2001 ◽  
Vol 2 (3) ◽  
pp. 222-240 ◽  
Author(s):  
Michael Lamport Commons ◽  
Patrice Marie Miller
Keyword(s):  
Developmental Stage ◽  
Behavioral Model ◽  
Hierarchical Complexity
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