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Short Note: Cleistogamy in Eucalyptus tereticornis Sm. and its Genetic Implications

. BARBOUR, A. B. HINGSTON and R. E. VAILLANCOURT (2003): Turner Review No. 6 Genetic pollution of native eucalypt gene pools - identifying the risks. Australian Journal of Botany 51: 1-25. PRYOR, L. D. (1976): The Biology of Eucalyptus, Edward Arnold, London. VENKATESH, C. S. (1971): Cleistogamy in Eucalyptus tereticornis Sm. Paper presented at IUFRO working group meeting, Gainesville, Fla. USA, March, 14-20. VENKATESH, C. S., R. S. ARYA and V. K. SHARMA (1973): Natural selfing in planted Eucalyptus and its estimation

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Genetic Variability and Early Growth Performance of Eucalyptus tereticornis Sm. in Provenance cum Progeny Trials in India

References BANERJEE, S. K., NATH, S. and NANDI, APARJITA (1990): Provenance trials of Eucalyptus tereticornis in two lateritic soils of West Bengal. Indian Journal of Forestry 13 (1): 1-7. CHAMSHAMA, S. A. O., MUGASHA, A. G. and WATE, P. A. (1999): Variation in performance of Eucalyptus tereticornis provenances at Michafutene, Mozambique. Silvae Genetica 48: 6. CHAPOLA, G. B. and NGULUBE, M. R. (1991): Productivity and wood properties of some Eucalypts at kasungu flue cured tobacco authority, Malawi. Forest

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Selection and validation of reference genes for real-time qRT-PCR normalization in different tissues of Eucalyptus tereticornis

primary cell wall synthesis in Bambusa oldhamii. Phytochemistry 71: 1270-1279. CHEZHIAN, P., R. YASODHA and M. GHOSH (2010): Genetic diversity analysis in a seed orchard of Eucalyptus tereticornis. New Forest 40(1): 85-99. CZECHOWSKI, T., M. STITT, T. ALTMAN, M. K. UDVARDI and W. R. SCHEIBLE (2005): Genome-wide identification and testing of superior reference genes for transcript normalization in Arabidopsis. Plant Physiol 139(1): 5-17. DAY, M. E., M. S. GREENWOOD and C. DIAZ-SALA (2002): Age- and size-related trends in

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Co-expression network of secondary cell wall biogenesis genes in Eucalyptus tereticornis

Biology 10: 341. https://doi.org/10.1186/1471-2148-10-341 Dharanishanthi V and M Ghosh Dasgupta (2016) Construction of co-expression network based on natural expression variation of xylogenesis-related tran­scripts in Eucalyptus tereticornis. Mol. Biol. Rep. 43: 1129-1146. https://doi.org/10.1007/s11033-016-4046-3 Du J and A Groover (2010) Transcriptional regulation of secondary growth and wood formation. Journal of Integrative Plant Biology 52: 17-27. https://doi.org/10.1111/j.1744-7909.2010.00901.x Ferreira SS, CT Hotta

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Fertility Variation and its Implications on Relatedness in Seed Crops in Seedling Seed Orchards of Eucalyptus camaldulensis and E. tereticornis

size in seedling seed orchards of Casuarina equisetifolia and C. junghuhniana. Silvae Genet. 53: 141-192. VARGHESE, M., N. RAVI, S. G. SON and D. LINDGREN (2002): Variation in fertility and its impact on gene diversity in a seedling seed orchard of Eucalyptus tereticornis. In: WEI, R. P. and XU, D. (eds.). Eucalyptus plantations- Research, Management and Development. World Scientific, Singapore. pp 111-126. VENKATESH, C. S. and S. KEDHARNATH (1965): Genetic improvement of Eucalyptus in India. Silvae Genet. 14, 141-176.

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Evaluation of Provenances of Eucalyptus camaldulensis and Clones of E. camaldulensis and E. tereticornis at Contrasting Sites in Southern India

. HARWOOD (2004): Genetic variability and early growth performance of Eucalyptus tereticornis Sm. in provenance cum progeny trials in India. Silvae Genetica 53, 148-161. GREAVES, B. L., N. M. G. BORALLHO and C. A. RAYMOND (1997): Breeding objectives for plantation eucalypts grown for kraft pulp. Forest Science 43, 465-472. HEGDE, R. and M. VARGHESE (2002): Selection and thinning in an unpedigreed seedling seed orchard of Eucalyptus camaldulensis Dehn. In: BAGCHI, S. K., VARGHESE, M. and SIDDAPPA (Eds.) Recent Eucalypt Research in India

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Compressional, mechanical and release properties of a novel gum in paracetamol tablet formulations

ABSTRACT

The binding properties of Eucalyptus gum obtained from the incised trunk of Eucalyptus tereticornis, were evaluated in paracetamol tablet formulations, in comparison with that of Gelatin B.P. In so doing, the compression properties were analyzed using density measurements and the compression equations of Heckel, Kawakita and Gurham. In our work, the mechanical properties of the tablets were assessed using the crushing strength and friability of the tablets, while the drug release properties of the tablets were assessed using disintegration and dissolution times. The results of the study reveal that tablet formulations incorporating Eucalyptus gum as binder, exhibited faster onset and higher amount of plastic deformation during compression than those containing gelatin. What is more, the Gurnham equation could be used as a substitute for the Kawakita equation in describing the compression properties of pharmaceutical tablets. Furthermore, the crushing strength, disintegration and dissolution times of the tablets increased with binder concentration, while friability values decreased. We noted that no significant differences in properties exist between formulations derived from the two binders (p > 0.05) exist. While tablets incorporating gelatin exhibited higher values for mechanical properties, Eucalyptus gum tablets had better balance between mechanical and release properties - as seen from the CSFR/Dt values. Tablets of good mechanical and release properties were prepared using Eucalyptus gum as a binder, and, therefore, it could serve as an alternative binder in producing tablets with good mechanical strength and fast drug release.

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Microsatellite allele length variations in inter-specific hybrids of Eucalyptus

Abstract

The genus Eucalyptus encompasses several species of industrial importance. Many of these species have been subjected to genetic characterization using different kinds of DNA markers. More than 1000 microsatellites have been identified from the genome of eucalypts and they are highly amenable for cross species transferability. During cross amplification of microsatellites, homoplasy is reported in many species in which although the allele size might be the same, the sequences are not. Thus, it is essential to ascertain the DNA sequence homology with source and target microsatellite repeats. Accordingly, fifty five alleles from six microsatellite loci (ECc1, ECc2, Eg61, Embra100, Embra1468 and Embra2002) were amplified in two inter-specific hybrid populations (Eucalyptus tereticornis × E. grandis and E. tereticornis × E. camaldulensis) and sequenced. The results showed that all the microsatellite loci were amplifying the target repeat types except for the loci Eg61 and Embra2002. The locus Eg61 has target repeat of (CAA)(GAT) but the sampled alleles had either (CAA)(GAT) or (GAT) alone. Similarly, the Embra2002 locus was targeting interrupting repeats of (CCA)..(CCA), but the sequenced alleles had repeats of (CCA) with or without interruption. Nevertheless, the allele size estimated in electrophoresis for hybrids was in conformity with that of the parent alleles. This study suggests the need for validation of the repeat characteristics of microsatellites by sequencing of the alleles particularly in cross species amplification.

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Seed Source Variation in Growth Performance of Eucalyptus camaldulensis Dehnh. of Australian Origin in India

. RAO, D.V. (1984): Provenance trial of Eucalyptus. Indian Forester 110: 28-34. RATHINAM, M., SUERNDRAN, C. and KONDAS, S. (1982): Interrelationship of wood yield component in Eucalyptus tereticornis Sm. Indian Forester 108: 460-470. SIDDIQUI, K. M., KJAN, M., and AKHTAR, S. (1979): Results of 10year old Eucalyptus camaldulensis Dehn. provenance study at Peshwar. Silvae Genetica 28: 24-26. SNEDECOR, G.W. and COCHRAN, W. G. (1967): Statistical Methods. Oxford and IBH, New Delhi. 593 pp. SUBRAMANIAN, K. N

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Genetic Gain and Gene Diversity Following Thinning in a Half-Sib Plantation

., N. RAVI, S.-G. SON and D. LINDGREN (2003): Variation in fertility and its impact on gene diversity in a seedling seed orchard of Eucalyptus tereticornis, pp. 46-60 in Proceedings from Symposium on Eucalyptus plantations, Sept 1-6, 2002, Guangdong, China. WU, H. X., A. C. MATHESON and D. SPENCER (1998): Inbreeding in Pinus radiata. I. The effect of inbreeding on growth, survival and variance. Theor. Appl. Genet. 97(8): 1256-1268.

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