Sulfur. By Dilibe, Alena, Travis, Shoko
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1 Sulfur By Dilibe, Alena, Travis, Shoko
2 Sulfur
3 What is it? It s a non-metallic element that is bright yellow at it s purest state. It is a polyatomic molecule. Octa sulfur cyclo S 8
4 Chemical properties Burns in blue flams which emits SO2 into the atmosphere It s insoluble in water but soluble in other non polar molecules like toluene and benzene Physical properties Sulfur forms polyatomic molecules with different chemical formulas Octa sulfur cyclo S 8 is it s purest from melting point of 115 C and boiling point 444 C. Anything below 95 degrees breaks down the molecular shape of cyclo S 8.
5 Where is sulfur located? In meteorites/sedimentary rocks In volcanos In hot strings In soil Combinations with other elements
6 Role of sulfur An essential component in the synthesis of amino acids required to manufacture proteins in plants. Required for production of chlorophyll and utilization of phosphorus, vitamins, and other essential nutrients. It increases the size and weight of grain crops and enhances the efficiency of nitrogen for protein synthesis.
7 How Sulfur is used as plant nutrition
8 Symptoms of Sulfur Deficiency Light green to yellowish color that first appears on the younger upper leaves Veins in the leaves are even lighter in color
9 Symptoms of Sulfur Deficiency Reduction in growth, branching, and leaf size Plants are small and thin with short, slender stalks
10 Symptoms of Sulfur Deficiency Purple or redbrown pigmentation may develop on both young and old leaves Spotting of leaves may occur
11 Sulfur Cycle
12 Soil sulfur is present in both inorganic and organic forms. Most of the sulfur in soils comes from the weathering of sulfate minerals; however, approximately 90% of the total sulfur in the surface layers of noncalcareous soils is in organic matter. Inorganic sulfur is usually present in the sulfate (SO 4 2- ) form, which is the form of S absorbed by plant roots. Elemental sulfur is a good source of S, but it must first undergo biological oxidation to SO 4 2-, driven for example by Thiobacillus thiooxidans bacteria or via a symbiotic arbuscular mycorrhiza, before plants can assimilate it. This oxidation can contribute to soil acidity by producing sulfuric acid. In higher plants, sulfur metabolism is initiated by the uptake of sulfate by roots from the environment. Plants assimilate inorganic sulfate into Cys, the first sulfurcontaining amino acids, and various sulfur-containing secondary metabolites.
13 Model depicting S transfer through an endomycorrhizal symbiosis. Roots and fungal mycelium both import SO 4 2 from external sources (1 and 12), and fungal uptake can supply isolated mycelium (8). The transfer of SO 4 2 through the mycorrhizal symbiosis is inversely related to root uptake (1 and 5). Cys and Met are imported by the fungus (13 and 14), resulting in a reduction of fungal uptake of SO 4 2 (11) and the transfer of a reduced form of S to the root (4). The reduction of SO 4 2 (7 and 2) and uptake of reduced S (13 and 14) lead to incorporation in the protein pools in both roots (3) and fungus (6). Putative steps in the assimilation pathway based on sequence data are depicted as gray arrows. Steps involving putative S assimilation genes are labeled in gray letters as follows: a, high affinity sulfate permease; b, sulfate adenylyltransferase; c, γ-cystathionine lyase; d, β-cystathionine synthetase. IRM, Intraradical mycelium.
14 Natural Inputs to the Global Sulfur Cycle
15 Conditions Affecting Uptake of Sulfur by Plants Sand: If soil is sandy, the sulfur is leachable, and so sandy soils are typically low in organic matter. Organic matter acts as a reservoir for sulfur in the soil- determining nutrient availability. Cold Soil: Low soil temperatures slows the process by which the various forms of sulfur are converted to the nutrient available sulfate (SO4,) that can be taken up by the plant s roots, as this is a microbial process. Poor Drainage: Highly saturated soil contains less oxygen, hindering the microbial process of converting forms of sulfur to the plant available sulfate. Pollution: Pollution from industrial sources can cause high levels of sulfur (sulfur dioxide and hydrogen sulfide) to be deposited in soil. Irrigation Water: Irrigation water can contain large amounts of sulfur, though excessive irrigation of sandy soils can leach sulfur out of the root zone of plants. Application of NH4 (ammonium): Adding NH 4 to soil has been shown to increase plants ability to uptake SO 4. *Functional pathway for sulfur assimilation metabolism.
16 Sulfur Assimilatory Metabolism
17 Sources Hergert, Gary W. (2000 ) Nutrient Management for Agronomic Crops in Nebraska(Ch. 5 Sulfur). Retrieved from Saito, Kazuki. (2004) Sulfur Assimilatory Metabolism. The Long and Smelling Road.Plant Physiol. (136(1): )Retrieved from
18 Sources Davidiana, J. C., & Koprivab, S. (2010). regulation of sulfate uptake and assimilation the same or not the same? Molecular Plant, 3(2), the rate of sulfate assimilation between more sulfate or less sulfate in plants department of industrial and primary industries. (n.d.). Retrieved from agriculture-and-food/dairy/pasturesmanagement/fertilising-dairy-pastures/ what-nutrients-do-plants-require Gabriel, M., Redfield, G., & Rumbold, D. (2008). Appendix 3B-2: Sulfur as a Regional Water Quality Concern in South Florida [White paper]. Retrieved May 4, 2014, from South Florida Water Management District website: portlet_sfer/tab /volume1/appendices/v1_app_3b-2.pdf Nikiforova, V., Kopka, J., Tolstikov, V., Fiehn, O., Hawkesford, M. J., Hesse, H.,... Hopkinis, L. (2005). Systems Rebalancing of Metabolism in Response to Sulfur Deprivation, as Revealed by Metabolome Analysis of Arabidopsis Plants1. Plant Physilogy, 138(1),
19 Sources Baird, J. (1991). Soil Facts. Retrieved from Hergert, Gary, W. (2000). Nutrient Management for Agronomic Crops in Nebraska (Ch. 5 Sulfur). Retrieved from O Sullivan, J. Sulfur Deficiency. Retrieved from dia/html/theproblems/mineraldeficiencies/sulfurdeficiency/s%20deficiency.htm
20 Sources Evanylo, G. Basic Soil Fertility [PDF document]. Retrieved from Goately, M., Henlser, K. (2004) Urban Nutrient Management Handbook (Chapter 4-12). Retrieved from Takahashi, H., Yamazaki, M., Sasakura, N., Watanabe, A., Leustek, T., Engler, J. A., Engler, G., Van Montagu, M. & Saito, K. (1997) Proc. Natl. Acad. Sci. USA 94, Allen, J.W., and Y. Shachar-Hill Sulfur transfer through an arbuscular mycorrhiza. Plant Physiol. 149: doi: /pp Ober, J. A. (2002). Materials Flow of Sulfur. U.S. Geological Survey. Retrieved from
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