The angle between helical windings of microfibrils in the secondary cell wall of fibers and the long axis is called microfibril angle (MFA). Stiffness of wood depends on variations in the MFA. The large MFA shows low stiffness, which is found in juvenile wood and this character make threes vulnerable to high winds breaking. Timber containing a high proportion of juvenile wood is unsuitable for use as high-grade structural timber. On the other hand, the small MFA in wood shows high stiffness, which has importance in a good view of the trend in forestry. The timber with high stiffness is commonly high economic value. They are grown mainly for construction, timber and furniture. Until date, it is under pressure for increased timber production means that ways will be sought to improve the quality of timber by reducing MFA. Commonly, MFA decrease during the formation of tension wood therefore study on tension wood related to MFA formation is important for MFA reduction in normal wood. The study on tension wood formation could predict expression patterns of genes/proteins for reduction of MFA. Herein, the orientation of microfibril and MFA in cell wall layers of normal and tension wood fiber are discussed.
Rubaiyat Sharmin Sultana,
Md. Mahabubur Rahman,
An Overview of Microfibril Angle in Fiber of Tension Wood, European Journal of Biophysics.
Vol. 2, No. 2,
2014, pp. 7-12.
Archer RR (1986) Growth Stresses and Strains in Trees. Springer Verlag, Berlin.
Timell TE (1986) Compression wood in gymnosperms I. Springer-Verlag, Berlin New York.
Bailey IW, Kerr T (1935). The visible structure of the secondary wall and its significance in physical and chemical investigations of tracheary cells and fibres. J Arnold Arboretum, 16: 273–300.
Frei E, Preston RD, Ripley GW (1957) The fine structure of the walls of conifer tracheids VI. Electron microscopy of sections. J Exp Bot, 8: 139–146.
Wardrop AB (1954) The mechanism of surface growth involved in the differentiation of fibres and tracheids. Australian J Bot, 2: 165–175.
Wardrop AB (1964) The structure and formation of the cell wall in xylem. In The Formation of Wood In Forest Trees (ed. M. H. Zimmermann). Academic Press, New York.
Mellerowicz EJ, Sundberg B (2008) Wood cell walls: biosynthesis, developmental dynamics and their implications for wood properties. Curr Opin Plant Biol, 11: 293–300.
Fournier M, Chanson B, Thibaut B, Guitard D (1991) Mechanics of standing trees: modelling a growing structure submitted to continuous and fluctuating loads. 2. Tridimen-sional analysis of maturation stresses. Case of standard hardwood. Ann Sci For, 48: 527–546 (in French).
Moulia B, Coutand C, Lenne C (2006) Posture control and skeletal mechanical acclimation in terrestrial plants: implications for mechanical modeling of plant architecture. Am J Bot, 93: 1477–1489.
Alme´ras T, Fournier M (2009) Biomechanical design and long-term stability of trees: morphological and wood traits involved in the balance between weight increase and the gravitropic reaction. J Theor Biol, 256: 370–381.
Bowling AJ, Vaughn KC (2009) Gelatinous fibers are widespread in coiling tendrils and twining vines. Am J Bot, 96: 719–727.
Boyd JD (1972) Tree growth stresses. Part V. Evidence of an origin in differen-tiation and lignification. Wood Sci Technol, 6: 251–262.
Bamber RK (1987) The origin of growth stresses: a rebuttal. IAWA Bull, 8: 80–84
Bamber RK (2001) A general theory for the origin of growth stresses in reaction wood: how trees stay upright. IAWA J, 22: 205–212.
Okuyama T, Yamamoto H, Yoshida M, Hattori Y, Archer RR (1994) Growth stresses in tension wood: role of microfibrils and lignification. Ann Sci For, 51: 291–300.
Okuyama T, Yoshida M, Yamamoto H (1995) An estimation of the turgor pressure change as one of the factors of growth stress generation in cell walls: diurnal change of tangential strain of inner bark. Mokuzai Gakkaishi, 41: 1070–1078.
Yamamoto H (1998) Generation mechanism of growth stresses in wood cell walls: roles of lignin deposition and cellulose microfibril during cell wall maturation. Wood Sci Technol, 32: 171–182.
Yamamoto H (2004) Role of the gelatinous layer on the origin of the physical properties of the tension wood. J Wood Sci, 50: 197–208.
Alme´ras T, Gril J, Yamamoto H (2005) Modelling anisotropic maturation strains in wood in relation to fibre boundary conditions, microstructure and maturation kinetics. Holzforschung, 59: 347–353.
Alme´ras T, Yoshida M, Okuyama T (2006) The generation of longitudinal maturation stress in wood is not dependent on diurnal changes in diameter of trunk. J Wood Sci, 52: 452–455.
Bowling AJ, Vaughn KC (2008) Immunocytochemical characterization of tension wood: gelatinous fibers contain more than just cellulose. Am J Bot, 95: 655–663.
Goswami L, Dunlop JWC, Jungnikl K, Eder M, Gierlinger N, Coutand C, Jeronimidis G, Fratzl P, Burgert I (2008) Stress generation in the tension wood of poplar is based on the lateral swelling power of the G-layer. Plant J, 56: 531–538.
Mellerowicz EJ, Immerzeel P, Hayashi T (2008) Xyloglucan: the molecular mus-cle of trees. Ann Bot (Lond), 102: 659–665.
Nishikubo N, Awano T, Banasiak A, Bourquin V, Ibatullin F, Funada R, Brumer H, Teeri TT, Hayashi T, Sundberg B (2007) Xyloglucan en-do-transglycosylase (XET) functions in gelatinous layers of tension wood fibers in poplar: a glimpse into the mechanism of the balancing act of trees. Plant Cell Physiol, 48: 843–855.
Mu¨nch E (1938) Statik und Dynamik des Schraubigen Baus der Zwellwand, besonders der Druck- and Zugholzes. Flora, 32: 357–424.
Clair B, Thibaut B (2001) Shrinkage of the gelatinous layer of poplar and beech tension wood. IAWA J, 22: 121–131.
Fang CH, Clair B, Gril J, Alme´ras T (2007) Transverse shrinkage in G-fibers as a function of cell wall layering and growth strain. Wood Sci Technol, 41: 659–671.
Clair B, Gril J, Di Renzo F, Yamamoto H, Quignard F (2008) Characterization of a gel in the cell wall to elucidate the paradoxical shrinkage of tension wood. Biomacromolecules, 9: 494–498.
Onaka F (1949) Studies on compression and tension wood. Wood Res, 1: 1–88 (translation from Japanese).
Clair B, Ruelle J, Beaucheˆne J, Pre´vost MF, Fournier Djimbi M (2006) Tension wood and opposite wood in 21 tropical rain forest species. 1. Occurrence and efficiency of the G-layer. IAWA J, 27: 329–338.
Ruelle J, Yamamoto H, Thibaut B (2007) Growth stresses and cellulose structural parameters in tension and normal wood from three tropical rainforest angiosperm species. BioResources, 2: 235–251.
Barnett JR, Bonham VA (2004) Cellulose microfibril angle in the cell wall of wood fibers. Biol Rev Camb Philos Soc, 79: 461–472.
Wardrop AB, Dadswell HE (1955) The nature of reaction wood: IV. Variations in cell wall organization of tension wood fibres. Australian J Bot, 3: 177-189.
Saiki H, Ono K (1971) Cell wall organization of gelatinous fibers in tension wood. Bull Kyoto Univ Forests, 43: 210-217.
Araki N, Fujita M, Saiki H, Harada H (1982) Transition of fiber wall structure from normal wood to tension wood in Robinia pseudoacacia L. and Populus euramericana Guinier. Mokuzai Gakkaishi, 28: 267-273.
Araki N, Fujita M, Saiki H, Harada H (1983) Transition of fiber wall structure from normal wood to tension wood in certain species having gelationous fibers of S1 + G and S1 + S2 + S3 + G types. Mokuzai Gakkaishi, 29: 491-499.
Prodhan AKMA, Funada R, Ohtani J, Abe H, Fukazawa K (1995a) Orientation of microfibrils and microtubules in developing tension-wood fibres of Japanese ash (Fraxinus mandshurica var. japonica). Planta, 196: 577-585.
Prodhan AKMA, Ohtani J, Funada R, Abe H, Fukazawa K (1995b) Ultrastructural investigation of tension wood fibre in Fraxinus mandshurica Rupr. var. japonica Maxim. Ann Bot, 75: 311- 317.
Okuyama T, Yamamoto H, Iguchi M, Yoshida M (1990) Generation process of growth stresses in cell walls II: Growth stresses in tension wood. Mokuzai Gakkaishi, 36: 797-803.
Sugiyama K, Okuyama T, Yamamoto H, Yoshida M (1993) Generation process of growth stresses in cell walls: Relation between longitudinal released strain and chemical composition. Wood Sci Technol, 27: 257- 262.
Yoshizawa N, Inami A, Miyake S, Ishiguri F, Yokota S (2000) Anatomy and lignin distribution of reaction wood in two Magnolia species. Wood Sci Technol, 34: 183-196.
Yoshida M, Ohta H, Yamamoto H, Okuyama T (2002) Tensile growth stress and lignin distribution in the cell walls of yellow poplar, Liriodendron tulipifera Linn. Trees, 16: 457-464.
Hiraiwa T, Yamamoto Y, Ishiguri F, Iizuka K, Yokota S, Yoshizawa N (2007) Cell wall structure and lignin distribution in the reaction wood fiber of Osmanthus fragrans var. au-rantiacus Makino. Cellulose Chem Technol 41: 537-543.
Côté WA Jr, Day AC (1965) Anatomy and ultrastructure of reaction wood. In: Côté WA Jr (ed), Cellular ultrastructure of woody plants, Syracuse University Press, New York, pp391-418.
Wardrop AB (1965) The formation and function of reaction wood. In: Côté WA Jr (ed), Cellular ultrastructure of woody plants, Syracuse University Press, New York, pp, 371-390.
Côté WA Jr, Day AC, Timell TE (1969) A contribution of the ultrastructure of tension wood fibres. Wood Sci Technol, 3: 257–271.
Scurfield G (1973) Reaction wood: Its structure and function. Science 179: 647-655.
Wilson BF, Archer RR (1977) Reaction wood: Induction and mechanical action. Annual Rev Plant Physiol, 28: 23-43.
Fisher JB (1985) Induction of reaction wood in Ter-minalia (Combretaceae): Roles of gravity and stress. Ann Bot, 55: 237-248.
Yamamoto H, Okuyama T, Sugiyama K, Yoshida M (1992) Generation process of growth stresses in cell walls IV: Action of the cellulose microfibril upon the generation of the tensile stresses. Mokuzai Gakkaishi, 38: 107-113.
Sultana RS, F Ishiguri, S Yokota, K Iizuka, T Hiraiwa, N Yoshizawa (2010) Wood anatomy of nine Japanese hardwood species forming reaction wood without gelatinous fibers. IAWA J, 31(2): 191-202.