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B. Gurudev Singh , Rekha R. Warrier , R. Anandalakshmi , V. Sivakumar , R. Sivalingam , N. P. Mahadevan , G. Chevanan

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R. Anandalakshmi , B. Gurudev Singh , R. Parimalam , R. R. Warrier , V. Sivakumar

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V. Sivakumar , Rekha. R. Warrier , R. Anandalakshmi , R. Parimalam , S. N. Vijaya Chandaran , B. Gurudev Singh

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Aegle marmelos and Feronia elephantum are indigenous medicinal tree species cultivated in many Asian countries. Seeds of these species were studied to improve the viability. As temperature plays major role in improving the viability, seeds were stored at different temperatures like ambient temperature (25 to 28 ° C), 10 to 12 ° C, 0 to −5 ° C in closed plastic containers. Seeds were tested for germination at monthly intervals. Initial germination of fresh seeds was 72 per cent and 94 per cent for A. marmelos and F. elephantum, respectively. At the end of 12 months, seeds of A. marmelos stored in ambient and 10-12 ° C temperature showed higher germination per cent (50% and 45% ) suggesting that the seeds could be stored for long durations under ambient temperature. Storing of A. marmelos seeds under low temperature (0 to −5 ° C) was found to be deleterious. On the other hand, seeds of F. elephantum stored well at 0 to −5 °C with 71 per cent germination after 12 months suggesting that the seeds could tolerate low temperatures.

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B. Gurudev Singh , N. P. Mahadevan , K. Shanthi , L. Manimuthu , S. Geetha

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Two methods of drying neem seeds were followed viz. sun drying and shade drying and found that the any of these two methods can be followed for drying seeds. The reduction in seed moisture has not affected the germination per cent. Storing seeds with high moisture content in deep freeze condition had deleterious effect on the viability. Storing seeds with low moisture content in ambient and refrigerator condition was recommended.

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K. Shanthi , N. P. Mahadevan , S. Geetha , B. Gurudev Singh

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B. Gurudev Singh , N. P. Mahadevan , K. Shanthi , S. Geetha , L. Manimuthu

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Multiple seedling development from a seed was observed in Neem (Azadirachta indica) during germination studies. The results are presented in this paper.

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K. N. Subramanian , B. Gurudev Singh , N. Venkatasubramanian , K. R. Sasidharan

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Litsea ghatica Saldanha hitherto recorded from the Western Ghat area of Karnataka is now traced from further south in Wynad Forest Division, Kerala State. A brief description of the taxon for easy iodentification aod the salient differences of the same with Litsea deccanensis Gamble, a closely allied species, are given. The need for the conservation and protection of the species is highlighted.

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A. Nicodemus ¹, A. Pauldasan ¹, P. Vipin ¹, J. Soosairaj ¹, A. Durai ¹, B. Gurudev Singh ¹

Affiliations
1 Institute of Forest Genetics and Tree Breeding Coimbatore, Tamil Nadu, IN

Abstract

Twenty provenances of six species of Casuarina (C. cristata, C. cunninghamiana, C. equisetifolia, C, glauca, C. junghuhniana, and C. obesa) were field tested for growth, stem straightness, bark, wood and fibre characters in Karunya, Tamil Nadu, India. Results obtained at 12 years ageshowedthat C. junghuhniana was the most adaptable and fastest growing species with 54% more volume production than the next ranking and widely cultivated species, C. equisetifolia. The SW Soe provenance of C. junghuhniana was the best provenance which recorded around 36% more volume than the species average and the best provenance of C. equisetifolia. The stem straightness was the best in C. cunninghamiana making it suitable for pole production. Bark thickness, wood density, moisture content and fibre traits varied significantly among species and provenances providing opportunity to select for different end uses like paper and fuelwood production. Since no adverse correlation was found between growth and wood traits, selections can be made independently for different traits. Testing of more provenances of C. cunninghamiana and C. cristata from northern latitudes and hybridization between species to combine desirable traits are proposed for effective utilization of genetic resources to increase plantation productivity.

Keywords

Casuarina, Provenance, Variation, South India.

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