K. Palanisamy , K. Gireesan , V. Nagarajan , Maheshwar Hegde

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Maheshwar Hegde , V. Mohan , P. Manokaran , K. Palanisamy

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K. Palanisamy , Maheshwar Hegde , K. Gireesan , A. Dural

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Clonal technology for mass propagating the high yielding Neem (Azadirachta indica A. Juss) trees has been standardized for the first time. A clone bank ofNeem has been established with 60 clones from different parts of Tamil Nadu. The juvenile cuttings collected from the selected clones in the clone bank gave 77 to 100% ischolar_maining throughout the year indicating that hedging induced juvenility in mature tissues. Season does not have a major role on ischolar_maining in juvenile cuttings and superior Neem trees can be clonally multiplied throughout the year. The clonal propagules showed early flowering and fruiting suggesting the possible reduction in juvenile phase of the tree and accelerating the breeding programme. A clonal seed orchard of Neem with 17 clones has been established at Sadivayal , Coimbatore for quality seed production.

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K. Palanisamy , Pramod Kumar

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Neem (Azudirachta indica A. Juss), one of the globally important tree species, grows well in dry areas. The vegetative propagation technique (adventitious ischolar_maining in branch cuttings) has been standardized. 1000 ppm IBA induced 80% ischolar_maining and luxuriant ischolar_main system in branch cuttings of mature trees only in leaf fall season (February). However,juvenile cuttings collected from young seedlings showed ischolar_maining in most of the months. The technique is recommended for mass multiplication of superior trees for establishment of clonal seed orchard and afforestation programmes. No attempt has been made so far on the genetic improvement of the tree. It is emphasized that research on genetics and breeding shall pave the way for commercial exploitation of Neem.

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K. Palanisamy , S. S. Bisen

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R. Sivalingam , M. Smitha , Maheshwar Hegde , A. Karthikeyan , K. Palanisamy

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Response of Terminalia chebula Retz. To application with three different Biofertilizers like Azospirillum, phospobacteria and vesicular arbuscular mycorrhizal (VAM) and four different Biofertilizers combinations like Azospirillum with Phospobacteria, Azospirillum with VAM Phospobacteria with VAM and Azospirillum with Phospobacteria and VAM was studied under nursery condition. The plants were assessed for increment in height, stem girth, collar diameter and number of leaves at 30, and 60 days of treatment. The treatment with combination of Azospirillum 5g + Phospobacteria 5g to polythene bags (22 × 15 cm) containing soil, sand and FYM (2:1:1) showed higher growth in height, stem girth and ischolar_main collar diameter. Seedling treated with VAM also had greater shoot and leaf biomass. The use of Biofertilizers such as Azospirillum, Phospobacteria and Vesicular Arbuscular Mycorrhizal fungi (VAM) on Terminalia chebula to solve the problem of slow growth of seedlings is discussed.

Keywords

Terminalia chebula, Biofertilizers, Nursery, Vesicular Arbuscular Mycorrhiza, Phospobacteria

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K. Palanisamy

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K. Palanisamy , Pramod Kumar

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The seasonal influence of auxins (IAA, IBA, NAA) on adventitious ischolar_main formation in the cuttings of Pongamia pinnata was studied. 800 ppm IBA induced 100% ischolar_maining and more number of ischolar_mains in march. Exogenously applied auxins are sensitive to activate the cambium resulting adventitious ischolar_main formation in a particular season probably when the cambium is in active phase.

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