Abstract
Tracheary elements (TEs) were physically separated from the hulls of cacao pods(Theobroma cacao L). Their morphological features were extensively investigated with scanning electron microscopy and chemical characterization. Spiral TEs were covered with a thin layer of primary wall that had a web-like structure on its outer surface. These TEs had a spiral circularity diameter of 8.2 ± 0.6 μm and an estimated secondary wall thickness of about 2.1 ± 0.2 μm. Polarized microscopy analysis revealed that the cellulose microfibrils were aligned parallel to that thickening. Lignin content was 36.1%, with a 0.13:1.00 molar ratio of syringyl to guaiacyl units and a 1.09:1.00 molar ratio of erythronic acid and threonic acid. Total yields of the alkaline nitrobenzene oxidation and ozonation products were 324.5 and 148.8 μmol g-1 of extract-free TEs, respectively. Based on these morphological and lignin characteristics, we conclude that fully ripened cacao hulls exhibit the same features of secondary wall thickening as those seen at an earlier stage.
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Literature Cited
Akiyama T, Magara K, Matsumoto Y, Meshitsuka G, Ishizu A, Lundquist K (2000) Proof of the presence of racemic forms of arylglycerol-β -aryl ether structure in lignin: Studies on the stereo structure of lignin by ozonation. J Wood Sci46: 414–415
Akiyama T, Sugimoto T, Matsumoto Y, Meshitsuka G (2002) Erythro/threo ratio of β -O-4 structures as an important structural characteristic of lignin. I: Improvement of ozonation method for the quantitative analysis of lignin side-chain structure. J Wood Sci48: 210–215
Anterola AM, Lewis NG (2002) Trend in lignin modification: A comprehensive analysis of the effects of genetic manipulations/ mutations on lignification and vascular integrity. Phytochemistry61: 221–294
Bierhorst DW, Zamora PM (1965) Primary xylem elements and element associations of angiosperms. Amer J Bot52: 657–710
Burgess J (1985) An Introduction to Plant Cell Development. Cambridge University Press, Cambridge, pp 21–24, 94–128
Carlquist S (1996) Wood, bark, and stem anatomy of gnetales: A summary. Intl J Plant Sci157: S58-S76
Carlquist S, Schneider EL (1997a) SEM studies on vessels in ferns. 2.Pteridium. Amer J Bot84: 581–587
Carlquist S, Schneider EL (1997b) SEM studies on vessels in ferns. 4.Astrolepis. Amer Fern J87: 43–50
Carlquist S, Schneider EL, Yatskievych G (1997) SEM studies on vessels in ferns. 1.Woodsia obtuse. Amer Fern J87: 1–8
Chen CL (1992) Nitrobenzene and cupric oxide oxidations,In SY Lin, CW Dence, eds, Methods in Lignin Chemistry. Springer-Verlag, Berlin, pp 301–321
Chung BY, liyama K, Han KW (2003) Compositional characterization of cacao(Theobroma cacao L.) hull. Agric Chem Biotechnol46: 12–16
Faix VO, Schweers W (1975) Vergleichende Untersuchungen an ploymermodellen des lignins (DHP’s) verschiedener Zusammensetzungen. 6. Mitt, athanolyse, nitrobenzol-oxidation und hydrogenolyse. Holzforschung29: 48–55
Fengel D, Wegener G (1984) Wood: Chemistry, Ultrastructure, Reactions. Walter de Gruyter, Berlin, pp 132
Frost FH (1930a) Specialization in secondary xylem in dicotyledons. I. Origin of vessel. Bot Gaz89: 67–94
Frost FH (1930b) Specialization in secondary xylem in dicotyledons. I. Evolution of end wall of vessel segment. Bot Gaz90: 198–212
FukudaH (1997) Tracheary element differentiation. Plant Cell9: 1147–1156
Fukuda H, Komamine A (1982) Lignin synthesis and its related enzymes as markers of tracheary-element differentiation in single cells isolated from the mesophyll ofZinnia elegans. Planta155: 423–430
Habu N, Matsumoto Y, Ishizu A, Nakano J (1987) Quantitative determination of the diarylpropane structure in lignin by ozonation. Mokuzai Gakkaishi33: 534–536
Habu N, Matsumoto Y, Ishizu A, Nakano J (1988) Configurational study of phenylcoumaran type structure in lignin by ozonation. Mokuzai Gakkaishi34: 732–738
liyama K, Lam TBT (1990) Lignin in wheat internodes. Part 1: The reactivities of lignin units during alkaline nitrobenzene oxidation. J Sci Food Agric51: 481–491
Jin Z, Akiyama T, Chung BY, Matsumoto Y, liyama K, Watanabe S (2003) Changes in lignin content of leaf litters during mulching. Phytochemistry64: 1023–1031
Jung JH, Park CM (2007) Vascular development in plants: Specification of xylem and phloem tissues. J Plant Biol50: 301–305
Kaliamoorthy S, Krishnamurthy KV (1998) Secondary wall deposition in tracheary elements of cucumber grownin vitro. Biol Plant41: 515–522
Kim JH, Kim JS, Wi SG, Mun SP, Chung BY (2004) The cell wall characterization at immature and mature stages ofArabidopsis thaliana L. Agric Chem Biotechnol47: 11–14
López-Serrano M, Fernández MD, Pomar F, Pedreño MA, Ros Barcelö A (2004)Zinnia elegans uses the same peroxidase isoenzyme complement for cell wall lignification in both single-cell tracheary elements and xylem vessels. J Exp Bot55: 423–431
Matsumoto Y, Ishizu A, Nakano J (1986) Studies on chemical structure of lignin by ozonation. Holzforschung40: 81–85
McCarthy JL, Islam A (2000) Lignin chemistry, technology, and utilization: A brief history,In WG Glasser, RA Northey, TP Schultz, eds. Lignin: Historical, Biological, and Materials Perspectives, Vol 742. ACS Symposium Series, American Chemical Society, Washington, DC, pp 2–99
Nakashima J, Mizuno T, Takabe K, Fujita M, Saiki H (1997) Direct visualization of lignifying secondary wall thickenings inZinnia elegans cells in culture. Plant Cell Physiol38: 818–827
Oda Y, Mimura T, Hasezawa S (2005) Regulation of secondary cell wall development by cortical microtubules during tracheary element differentiation inArabidopsis cell suspensions. Plant Physiol137: 1027–1036
Robards AW, Wilson AJ (1993) Procedures in Electron Microscopy. John Wiley &Sons, New York, pp 13:0.1–13:4.3
Romberger JA, Hejnowicz Z, Hill JF (1993) Plant Structure: Function and Development. Springer-Verlag, Berlin, pp 45–65, 89–121
Sarkanen KV, Islam A, Anderson CD (1986) Ozonation,In SY Lin, CW Dence, eds, Methods in Lignin Chemistry. Springer-Verlag, Berlin, pp 387–406
Schneider EL, Carlquist S (1997) SEM studies on vessels in ferns. 3.Phlebodium andPolystichum. Intl J Plant Sci158: 343–349
Schneider EL, Carlquist S (1998) SEM studies on vessels in ferns. 5.Woodsia scopulina. Amer Fern J88: 17–23
Schöning AG, Johansson G (1965) Absorptiometric determinationof acid-soluble lignin in semichemical bisulfite pulps and in some woods and plants. Svensk Papperstidn68: 607–613
Terashima N, Fukushima K (1988) Heterogeneity in formation of lignin-XI: An autoradiographic study of the heterogeneous formation and structure of pine lignin. Wood Sci Technol22: 259–270
Terashima N, Nakashima J, Takabe K (1989) Proposed structure for protolignin in plant cell walls,In NG Lewis, S Sarkanen, eds, Lignin and Lignan Biosynthesis, Vol 697. ACS Symposium Series, American Chemical Society, Washington, DC, pp 180–193
Ye ZH (2002) Vascular tissue differentiation and pattern formation in plants. Annu Rev Plant Biol53: 183–202
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Chung, B.Y., Cho, JY., Lee, S.S. et al. The relationship between lignin and morphological characteristics of the tracheary elements from cacao(Theobroma cacao L.) Hulls. J. Plant Biol. 51, 139–144 (2008). https://doi.org/10.1007/BF03030723
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DOI: https://doi.org/10.1007/BF03030723