Nuclear behaviour during heartwood formation inAcacia auriculiformis A. Cann.
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Nuclear behaviour is studied inAcacia auriculiformis A. Cann. with reference to aging in both axial and ray parenchyma cells (contiguous to vessels and away from the vessels). The size of the nucleus and nucleolus reduces gradually towards the inner sapwood and at last they disappear at the heartwood boundary. Nuclei show lobing, fissuring, fragmentation and contraction in this zone prior to their disintegration. Thus a gradual loss of vitality of parenchyma cells during aging is noted. The parenchyma cells contiguous to vessels seem to be more actively involved in formation of heartwood extractives.
KeywordsNuclear disintegration nucleolus nucleus slenderness ratio transition wood Acacia auriculiformis
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- Bhat K V 1981Studies on heartwood formation in some Angiosperm trees; Ph.D. thesis, Sardar Patel University, Gujarat, IndiaGoogle Scholar
- Bhat K V and Patel J D 1980 Nuclear studies in relation to heartwood formation inOugeinia oojeinensis andGaruga pinnata;Caryologia 33, 519–526Google Scholar
- Bosshard H H 1966 Notes on the biology of heartwood formation;Int. Assn. Wood Anatomists, News Bull. 1 11–14Google Scholar
- Brachet J 1953 The use of basic dyes and ribonuclease for the cytochemical detection of ribonucleic acid;Q. J. Microsc. Sci. 94, 1–10Google Scholar
- Chavan R R, Kothari I L and Patel J D 1979 A simple area calculating device (ACD) for biological systems;Curr. Sci. 48 792–793Google Scholar
- Fukazawa K and Higuchi T 1966 Studies on the mechanism of heartwood formation IV. RNA content in the ray parenchyma cell;J. Jpn. Wood Res. Soc. 12 221–226Google Scholar
- Higuchi T, Fukazawa K and Shimada M 1967 Biochemical studies on the heartwood formation;Res. Bull. Coll. Expt. Forests 25 167–192Google Scholar
- O’brien T P, Fedder N and McCully M E 1964 Polychromatic staining of plant cell wall by toluidine blue ‘O’;Protoplasma 59 367–373Google Scholar
- Sass J E 1958Botanical microtechnique; Iowa State Univ. Press, USAGoogle Scholar