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Soluble Carbohydrates in Two Buffalograss Cultivars with Contrasting Freezing Tolerance
J. AMER. SOC. HORT. SCI. 127(1):45–49. 2002. Soluble Carbohydrates in Two Buffalograss Cultivars with Contrasting Freezing Tolerance S. Ball, Y.L. Qian,1 and C. Stushnoff Department of Horticulture and Landscape Architecture, Colorado State University, Fort Collins, CO 80523-1173 DDITIONAL INDEX WORDS A . Buchloe dactyloides, cold hardiness, fructose, glucose, raffinose, sucrose, LT50 ABSTRACT. No information is available regarding endogenous soluble carbohydrate accumulation in buffalograss [Buchloe dactyloides (Nutt.) Engelm.] during cold acclimation. The objective of this study was to determine composition of soluble carbohydrates and their relationship to freezing tolerance in two buffalograss cultivars, 609 and NE 91-118, with different freezing tolerances. The experiment was conducted under natural cold acclimation conditions in two consecutive years in Fort Collins, Colo. Based upon average LT50 (subfreezing temperature resulting in 50% mortality) from seven sampling intervals in 1998–99 and six sampling intervals in 1999–2000, ‘NE 91-118’ survived 4.5 °C and 4.9 °C colder temperatures than ‘609’, during the 1998-1999 and 1999–2000 winter seasons, respectively. Glucose, fructose, sucrose, and raffinose were found in both cultivars in both years, and were generally higher in acclimated than pre- and post-acclimated stolons. Stachyose was not present in sufficient quantities for quantification. Cultivar NE 91-118 contained 63% to 77% more glucose and 41% to 51% more raffinose than ‘609’ in the 1998–99 and 1999–2000 winter seasons, respectively. In 1999–2000, fructose content in ‘NE 91-118’ was significantly higher than that of ‘609’. A significant negative correlation was found between LT50 vs. all carbohydrates in 1999–2000, and LT50 vs. -
Postulated Physiological Roles of the Seven-Carbon Sugars, Mannoheptulose, and Perseitol in Avocado
J. AMER. SOC. HORT. SCI. 127(1):108–114. 2002. Postulated Physiological Roles of the Seven-carbon Sugars, Mannoheptulose, and Perseitol in Avocado Xuan Liu,1 James Sievert, Mary Lu Arpaia, and Monica A. Madore2 Department of Botany and Plant Sciences, University of California, Riverside, CA 92521 ADDITIONAL INDEX WORDS. ‘Hass’ avocado on ‘Duke 7’ rootstock, phloem transport, ripening, Lauraceae ABSTRACT. Avocado (Persea americana Mill.) tissues contain high levels of the seven-carbon (C7) ketosugar mannoheptulose and its polyol form, perseitol. Radiolabeling of intact leaves of ‘Hass’ avocado on ‘Duke 7’ rootstock indicated that both perseitol and mannoheptulose are not only primary products of photosynthetic CO2 fixation but are also exported in the phloem. In cell-free extracts from mature source leaves, formation of the C7 backbone occurred by condensation of a three-carbon metabolite (dihydroxyacetone-P) with a four-carbon metabolite (erythrose-4-P) to form sedoheptulose-1,7- bis-P, followed by isomerization to a phosphorylated D-mannoheptulose derivative. A transketolase reaction was also observed which converted five-carbon metabolites (ribose-5-P and xylulose-5-P) to form the C7 metabolite, sedoheptu- lose-7-P, but this compound was not metabolized further to mannoheptulose. This suggests that C7 sugars are formed from the Calvin Cycle, not oxidative pentose phosphate pathway, reactions in avocado leaves. In avocado fruit, C7 sugars were present in substantial quantities and the normal ripening processes (fruit softening, ethylene production, and climacteric respiration rise), which occurs several days after the fruit is picked, did not occur until levels of C7 sugars dropped below an apparent threshold concentration of ≈20 mg·g–1 fresh weight. -
Carbohydrates Are Defined As Polyhydroxy Aldehydes Or Polyhydroxy Ketones Or Compounds That on Hydrolysis Produce Either Acetic Acid and Lactic Acid
¾ Carbohydrates are defined as polyhydroxy aldehydes or polyhydroxy ketones or compounds that on hydrolysis produce either acetic acid and lactic acid. They are substances of universal occurrence and are much abundant in plants rather than in animals. ¾ Carbohydrates are grouped into two major classes: simple sugars (saccharides) and polysaccharides. Low molecular weight carbohydrtes are crystalline, soluble in water and sweet in taste; example glucose, fructose and sucrose. The high molecular weight carbohydrates (polymers) are amorphous, tasteless and relatievly less soluble in water; example starch, cellulose, gums, pectins, inulin etc. Bioses : Two carbon atom. Trisoes: Three carbon atoms, but in the form of phospheric esters, eg: glyceraldehyde Tetroses : Four carbon atoms eg: erythroses Pentoses: hemicellulose, mucilage ad gums Hexoses : six carbon atoms aldoses: glucose, mannose, galactose. ketoses: fructose and sorbose Carbohydrates which upon hydrolysis yield two molecules of monosaccharide are called as disaccharides. Sucrose on hydrolysis gives glucose and fructose (sugarcane) Maltose on hydrolysis gives glucose and glucose (malt sugar) Lactose on hydrolysis gives glucose and galactose (cow’s milk) These liberate three molecules of monosaccharides on hydrolysis. Raffinose on hydrolysis gives glucose , fructose and galactose. Gentianose on hydrolysis gives two glucose molecules and fructose Scillatriose , mannotrose , phanteose are the other examples. Stachyose , a tetrasaccharide, yields on hydrolysis , four molecules -
GRAS Notice 896, Alpha-Galacto-Oligosaccharides
GRAS Notice (GRN) No. 896 https://www.fda.gov/food/generally-recognized-safe-gras/gras-notice-inventory NOV 1 8 2019 OFFICE OF FOOD ADDITI\/t: SAFETY GENERALLY RECOGNIZED AS SAFE (GRAS) NOTIFICATION FOR ALPHA-GALACTO OLIGOSACCHARIDES (ALPHAGOS®) IN CONVENTIONAL FOODS AND BEVERAGES AND NON-EXEMPT INFANT FORMULAS Prepared for: Olygose Pare Technologique des Rives de l'Oise BP 50149, F-60201 Compiegne Cedex France Prepared by: Spherix Consulting Group, Inc. 11821 Parklawn Drive, Suite 310 Rockville, MD 20852 USA November 13, 2019 GRAS Notification for the Use of alpha-GOS November 13, 2019 Prepared for Olygose TABLE OF CONTENTS I. SIGNED STATEMENT OF THE CONCLUSION OF GENERALLY RECOGNIZED AS SAFE (GRAS) AND CERTIFICATION OF CONFORMITY TO 21 CFR §170.205-170.260 .... 1 A. SUBMISSION OF GRAS NOTICE .................................................................................1 B. NAME AND ADDRESS OF THE SPONSOR ................................................................1 C. COMMON OR USUAL NAME .......................................................................................1 D. TRADE SECRET OR CONFIDENTIAL INFORMATION ............................................1 E. INTENDED USE ..............................................................................................................1 F. BASIS FOR GRAS DETERMINATION .........................................................................1 G. PREMARKET APPROVAL ............................................................................................3 H. AVAILABILITY OF -
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Environmental Science: Nano CdS Nanoparticles in Soil Induce Metabolic Reprogramming in Broad Bean (Vicia faba L.) Roots and Leaves Journal: Environmental Science: Nano Manuscript ID EN-ART-08-2019-000933.R1 Article Type: Paper Page 1 of 36 Environmental Science: Nano 1 2 3 4 The rapid development of nanotechnology has raised concern regarding the 5 6 7 environmental toxicity of nanoparticles (NPs). However, little is known about the 8 9 molecular mechanisms underlying NP toxicity in plants. Understanding toxic 10 11 12 mechanisms in organisms at molecular level, especially in crop plants, is important for 13 14 their sustainable use and development. In this study, although none of the phenotypic 15 16 17 parameters of broad bean plants (photosynthetic pigments contents, biomass, and lipid 18 19 20 peroxidation) were overtly impacted in response to CdS-NPs in soil during 28 d of 21 22 exposure, metabolomics revealed marked and statistically significant alterations in the 23 24 25 metabolite profiles of plant roots and leaves. The reprogramming of antioxidant 26 27 metabolite production presumably reflected the molecular defense response of the 28 29 30 plants to CdS-NPs stress. The sensitive responses of flavone, putrescine and 31 32 33 noradrenaline in the leaves suggests the use of these compounds in legumes as 34 35 biomarkers of oxidative stress induced by the presence of CdS-NPs in soil. 36 37 38 Metabolomics might thus be a suitable approach for the early detection of soil 39 40 contamination by Cd. In the plants, the reprogramming of carbon and nitrogen 41 42 43 metabolism (including sugars, organic acids, amino acids, and N-containing 44 45 46 compounds) alleviated the toxicity of CdS-NPs, which may have been caused by free 47 48 Cd2+ ions or perhaps by a particle-specific response. -
And Honeydew Sugars with Respect to Their Utilization by the Hymenopteran Parasitoid Cotesia Glomerata F.L
Journal of Insect Physiology 47 (2001) 1077–1084 www.elsevier.com/locate/jinsphys A comparison of nectar- and honeydew sugars with respect to their utilization by the hymenopteran parasitoid Cotesia glomerata F.L. Wa¨ckers * Institute of Plant Sciences, Applied Entomology, Swiss Federal Institute of Technology (ETH), 8092 Zurich, Switzerland Received 10 October 2000; received in revised form 12 February 2001; accepted 19 February 2001 Abstract Fourteen naturally occurring sugars were individually tested with respect to their effect on Cotesia glomerata longevity. Parasitoids kept with solutions of either sucrose, glucose and fructose lived for Ͼ30 days. This constitutes a factor 15 increase in life span in comparison to control individuals kept with water only. Stachyose, mannose, melezitose, melibiose, maltose and erlose increased parasitoid longevity by a factor of 11.2–6.9. Solutions of galactose and trehalose had a marginal, but still significant effect. Lactose and raffinose did not raise parasitoid longevity, while rhamnose actually reduced parasitoid survival. In an additional experiment, the relationship between quantity of sugar consumption and longevity was established for all 14 sugars. To study the effect of an unsuitable sugar in sugar mixtures, a range of glucose:rhamnose mixtures was tested. Even at 20% of the sugar mixture rhamnose suppressed the nutritional benefit of the 80% glucose. The nutritional suitability of the sugars shows a positive correlation with the previously reported gustatory response towards the individual sugars. Patterns of sugar utilization are discussed with respect to hydrolytic enzymes and carbohydrate biochemical characteristics. Our findings for C. glomerata are compared to patterns of sugar utilization reported for other species. -
Electronic Supplementary Information
Electronic Supplementary Material (ESI) for Chemical Science. This journal is © The Royal Society of Chemistry 2019 Electronic Supplementary Information Poly(ionic liquid)s as a Distinct Receptor Material to Create Highly- Integrated Sensing Platform for Efficiently Identifying a Myriad of Saccharides Wanlin Zhang, Yao Li, Yun Liang, Ning Gao, Chengcheng Liu, Shiqiang Wang, Xianpeng Yin, and Guangtao Li* *Corresponding authors: Guangtao Li ([email protected]) S1 Contents 1. Experimental Section (Page S4-S6) Materials and Characterization (Page S4) Experimental Details (Page S4-S6) 2. Figures and Tables (Page S7-S40) Fig. S1 SEM image of silica colloidal crystal spheres and PIL inverse opal spheres. (Page S7) Fig. S2 Adsorption isotherm of PIL inverse opal. (Page S7) Fig. S3 Dynamic mechanical analysis and thermal gravimetric analysis of PIL materials. (Page S7) Fig. S4 Chemical structures of 23 saccharides. (Page S8) Fig. S5 The counteranion exchange of PIL photonic spheres from Br- to DCA. (Page S9) Fig. S6 Reflection and emission spectra of spheres for saccharides. (Page S9) Table S1 The jack-knifed classification on single-sphere array for 23 saccharides. (Page S10) Fig. S7 Lower detection concentration at 10 mM of the single-sphere array. (Page S11) Fig. S8 Lower detection concentration at 1 mM of the single-sphere array. (Page S12) Fig. S9 PIL sphere exhibiting great pH robustness within the biological pH range. (Page S12) Fig. S10 Exploring the tolerance of PIL spheres to different conditions. (Page S13) Fig. S11 Exploring the reusability of PIL spheres. (Page S14) Fig. S12 Responses of spheres to sugar alcohols. (Page S15) Fig. -
Xylose Fermentation to Ethanol by Schizosaccharomyces Pombe Clones with Xylose Isomerase Gene." Biotechnology Letters (8:4); Pp
NREL!TP-421-4944 • UC Category: 246 • DE93000067 l I Xylose Fermenta to Ethanol: A R ew '.) i I, -- , ) )I' J. D. McMillan I ' J.( .!i �/ .6' ....� .T u�.•ls:l ., �-- • National Renewable Energy Laboratory II 'J 1617 Cole Boulevard Golden, Colorado 80401-3393 A Division of Midwest Research Institute Operated for the U.S. Department of Energy under Contract No. DE-AC02-83CH10093 Prepared under task no. BF223732 January 1993 NOTICE This report was prepared as an account of work sponsored by an agency of the United States government. Neither the United States government nor any agency thereof, nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, com pleteness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily con stitute or imply its endorsement, recommendation, or favoring by the United States government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States government or any agency thereof. Printed in the United States of America Available from: National Technical Information Service U.S. Department of Commerce 5285 Port Royal Road Springfield, VA22161 Price: Microfiche A01 Printed Copy A03 Codes are used for pricing all publications. The code is determined by the number of pages in the publication. Information pertaining to the pricing codes can be found in the current issue of the following publications which are generally available in most libraries: Energy Research Abstracts (ERA); Govern ment Reports Announcements and Index ( GRA and I); Scientific and Technical Abstract Reports(STAR); and publication NTIS-PR-360 available from NTIS at the above address. -
Lecture 7 - the Calvin Cycle and the Pentose Phosphate Pathway
Lecture 7 - The Calvin Cycle and the Pentose Phosphate Pathway Chem 454: Regulatory Mechanisms in Biochemistry University of Wisconsin-Eau Claire 1 Introduction The Calvin cycle Text The dark reactions of photosynthesis in green plants Reduces carbon from CO2 to hexose (C6H12O6) Requires ATP for free energy and NADPH as a reducing agent. 2 2 Introduction NADH versus Text NADPH 3 3 Introduction The Pentose Phosphate Pathway Used in all organisms Glucose is oxidized and decarboxylated to produce reduced NADPH Used for the synthesis and degradation of pentoses Shares reactions with the Calvin cycle 4 4 1. The Calvin Cycle Source of carbon is CO2 Text Takes place in the stroma of the chloroplasts Comprises three stages Fixation of CO2 by ribulose 1,5-bisphosphate to form two 3-phosphoglycerate molecules Reduction of 3-phosphoglycerate to produce hexose sugars Regeneration of ribulose 1,5-bisphosphate 5 5 1. Calvin Cycle Three stages 6 6 1.1 Stage I: Fixation Incorporation of CO2 into 3-phosphoglycerate 7 7 1.1 Stage I: Fixation Rubisco: Ribulose 1,5- bisphosphate carboxylase/ oxygenase 8 8 1.1 Stage I: Fixation Active site contains a divalent metal ion 9 9 1.2 Rubisco Oxygenase Activity Rubisco also catalyzes a wasteful oxygenase reaction: 10 10 1.3 State II: Formation of Hexoses Reactions similar to those of gluconeogenesis But they take place in the chloroplasts And use NADPH instead of NADH 11 11 1.3 State III: Regeneration of Ribulose 1,5-Bisphosphosphate Involves a sequence of transketolase and aldolase reactions. 12 12 1.3 State III: -
Sugars and Plant Innate Immunity
Journal of Experimental Botany Advance Access published May 2, 2012 Journal of Experimental Botany, Page 1 of 10 doi:10.1093/jxb/ers129 REVIEW PAPER Sugars and plant innate immunity Mohammad Reza Bolouri Moghaddam and Wim Van den Ende* KU Leuven, Laboratory of Molecular Plant Biology, Kasteelpark Arenberg 31, B-3001 Leuven, Belgium * To whom correspondence should be addressed. E-mail: [email protected] Received 27 January 2012; Revised 25 March 2012; Accepted 30 March 2012 Abstract Sugars are involved in many metabolic and signalling pathways in plants. Sugar signals may also contribute to Downloaded from immune responses against pathogens and probably function as priming molecules leading to pathogen-associated molecular patterns (PAMP)-triggered immunity and effector-triggered immunity in plants. These putative roles also depend greatly on coordinated relationships with hormones and the light status in an intricate network. Although evidence in favour of sugar-mediated plant immunity is accumulating, more in-depth fundamental research is required to unravel the sugar signalling pathways involved. This might pave the way for the use of biodegradable http://jxb.oxfordjournals.org/ sugar-(like) compounds to counteract plant diseases as cheaper and safer alternatives for toxic agrochemicals. Key words: immunity, pathogen, priming, signal, sugar. Introduction by guest on March 24, 2016 Sugars such as glucose, fructose, and sucrose are recognized Chisholm et al., 2006). Sugars are well known to activate as signalling molecules in plants (Rolland et al., 2006; various pattern recognition genes (Herbers et al., 1996a,b; Bolouri-Moghaddam et al., 2010), in addition to their Johnson and Ryan, 1990). -
Conversion of D-Ribulose 5-Phosphate to D-Xylulose 5-Phosphate: New Insights from Structural and Biochemical Studies on Human RPE
The FASEB Journal • Research Communication Conversion of D-ribulose 5-phosphate to D-xylulose 5-phosphate: new insights from structural and biochemical studies on human RPE Wenguang Liang,*,†,1 Songying Ouyang,*,1 Neil Shaw,* Andrzej Joachimiak,‡ Rongguang Zhang,* and Zhi-Jie Liu*,2 *National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China; †Graduate University of Chinese Academy of Sciences, Beijing, China; and ‡Structural Biology Center, Argonne National Laboratory, Argonne, Illinois, USA ABSTRACT The pentose phosphate pathway (PPP) such as erythrose 4-phosphate, glyceraldehyde 3-phos- confers protection against oxidative stress by supplying phate, and fructose 6-phosphate that are necessary for NADPH necessary for the regeneration of glutathione, the synthesis of aromatic amino acids and production which detoxifies H2O2 into H2O and O2. RPE functions of energy (Fig. 1) (3, 4). In addition, a majority of the in the PPP, catalyzing the reversible conversion of NADPH used by the human body for biosynthetic D-ribulose 5-phosphate to D-xylulose 5-phosphate and is purposes is supplied by the PPP (5). Interestingly, RPE an important enzyme for cellular response against has been shown to protect cells from oxidative stress via oxidative stress. Here, using structural, biochemical, its participation in PPP for the production of NADPH and functional studies, we show that human D-ribulose (6–8). The protection against reactive oxygen species is ؉ 5-phosphate 3-epimerase (hRPE) uses Fe2 for cataly- exerted by NADPH’s ability to reduce glutathione, sis. Structures of the binary complexes of hRPE with which detoxifies H2O2 into H2O (Fig. 1). -
Carbohydrates: Structure and Function
CARBOHYDRATES: STRUCTURE AND FUNCTION Color index: . Very important . Extra Information. “ STOP SAYING I WISH, START SAYING I WILL” 435 Biochemistry Team *هذا العمل ﻻ يغني عن المصدر المذاكرة الرئيسي • The structure of carbohydrates of physiological significance. • The main role of carbohydrates in providing and storing of energy. • The structure and function of glycosaminoglycans. OBJECTIVES: 435 Biochemistry Team extra information that might help you 1-synovial fluid: - It is a viscous, non-Newtonian fluid found in the cavities of synovial joints. - the principal role of synovial fluid is to reduce friction between the articular cartilage of synovial joints during movement O 2- aldehyde = terminal carbonyl group (RCHO) R H 3- ketone = carbonyl group within (inside) the compound (RCOR’) 435 Biochemistry Team the most abundant organic molecules in nature (CH2O)n Carbohydrates Formula *hydrate of carbon* Function 1-provides important part of energy Diseases caused by disorders of in diet . 2-Acts as the storage form of energy carbohydrate metabolism in the body 3-structural component of cell membrane. 1-Diabetesmellitus. 2-Galactosemia. 3-Glycogen storage disease. 4-Lactoseintolerance. 435 Biochemistry Team Classification of carbohydrates monosaccharides disaccharides oligosaccharides polysaccharides simple sugar Two monosaccharides 3-10 sugar units units more than 10 sugar units Joining of 2 monosaccharides No. of carbon atoms Type of carbonyl by O-glycosidic bond: they contain group they contain - Maltose (α-1, 4)= glucose + glucose -Sucrose (α-1,2)= glucose + fructose - Lactose (β-1,4)= glucose+ galactose Homopolysaccharides Heteropolysaccharides Ketone or aldehyde Homo= same type of sugars Hetero= different types Ketose aldose of sugars branched unBranched -Example: - Contains: - Contains: Examples: aldehyde group glycosaminoglycans ketone group.