Plants during growth

Bukvova and Tichy reported that HA influenced the development of phosphorylase in wheat plants during growth in sand culture, the nature of the effect depending on the concentration of the humic substances. At a concentration of lOmgl HA enhanced the development of phosphorylase... 

Carpita, N.C. and Gibeaut, D.M. (1993) Stmctural models of primary ceU walls in flowering plants consistency of molecular structure with the physical properties of the waUs during growth. Plant J. 3 1-30. 

Neufeld, E.F., Feingold, D.S., and Hassid, W.Z. (1958) Enzymatic conversion of uridine diphosphate D-glucuronic acid to uridine diphosphate galacturonic acid, uridine diphosphate xylose, and uridine diphosphate arabinose. JAmer.Chem.Soc. 80 4430 Northcote, D.H. (1985) Control of cell wall formation during growth. In Biochemistry of Plant Cell Walls, edited by C.T. Brett, et al, pp. 177-197. Cambridge University Press, Cambridge. 

Besides, it is known that the culture medium acts as a common external sink like a lamella (15) or a vacuole (19), in which polysaccharides, enzymes and other metabolites are secreted during growth. Consequently, the growth of plant cell suspensions is a complex process, connected with structural and metabolite changes both in the cell wall and in the culture medium, involving a complex of hydrolytic enzymes. 

Buta JG and Spaulding DW. 1997. Endogenous levels of phenolics in tomato fruit during growth and maturation. J Plant Growth Regul 16(1) 43—46. 

Elevated accumulations occur in aquatic plants during exposure to 100 pg/L and in fish during exposure between 1 and 13 pg/L. All species in these groups, however, seemed unaffected by elevated body burdens, as judged by normal growth and metabolism. 

Food contamination may result from transmission of lead from glaze, enamel, or tinning on kitchen dishes, or from the lead on surfaces of containers or pipes used for storage, processing and transportation of food products. The occurrence of lead in food can also result from environmental contamination, as plants and animals may assimilate lead during growth and incorporate it into their tissues. The level of lead found in plant tissues is proportional to its concentration in the environment, and in cases of animals, the feed and water supplies also play important roles (Vreman et al., 1988 McLaughlin et ah, 1999 Sedki et ah, 2003). 

Genetic or other factors that induce stomatal closure will reduce plant sensitivity to oxidant pollutants. Generally, the sensitivity of plants at the time of exposure is controlled primarily by factors that affect the stomatal aperture. The internal resistance to gas flow may also influence leaf sensitivity. Factors that affect sensitivity during growth usually cause physiologic changes in the plant that tend to make it more resistant to the added stress of oxidant. Many of these stresses may alter membrane physiology and make the membranes either more or less sensitive to oxidant stress. 

Juhr n, M.. W. Noble, and F. W. Went. The standardization of Poa annua as an indicator of smog concentrations. I. Effects of temperature, photoperiod, and light intensity during growth of the test plants. Plant Physiol. 32 576-, 1957. 

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