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Large Scale Multiplication of Casuarina junghuhniana Miq. Clonal Plants through Mini-cutting Technique

Journal of Agricultural Science and Technology(B) 2020年第2期10卷 98-105页

作者： chezhian palanisamy Seenivasan Ramanathan Selvakrishnan palanisamy Suresh Kumar Ganesan Department of Plantation Tamil Nadu Newsprint and Papers LimitedKagithapurmKarurTamil Nadu 639136India

The modern concept of meeting the customer’s requirements in better products at low costs in a sustainable manner is possible only through innovative *** nodal cutting technique is the most widely used method for large scale propagation of Casuarina,Eucalyptus and other pulpwood species in *** Nadu Newsprint and Papers Limited(TNPL)has started large scale multiplication of Casuarina junghuhniana *** mini-cutting technique from indoor clonal mini hedges raised in sand *** compared to stem/nodal cuttings,indoor clonal mini hedges raised in sand beds improve the rooting potential,quality of root systems and are time-and *** productivity of cuttings is increased five times in indoor clonal hedge orchard than conventional stem/nodal *** rooting percentage also improved to 90%without rooting hormone whereas the same is only 50%in stem *** plant developed through mini-cutting technique has more lateral root system which helps the plants/trees to withstand during heavy *** such stump derived stock plants by intensively managing indoor sand bed clonal mini hedges resulted in a noticeable enhancement of cutting capacity for adventitious rooting as well as the overall quality of the plants produced in much shorter period with easier and cheaper *** study reveals that mini-cutting method is ideal propagation technique for large scale propagation of *** clones in India.

关键词： Casuarina junghuhniana mini-cutting stem cutting sand bed and propagation

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Toxicological effects of ammonia on gills of Cyprinus carpio ***(Linn.)

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Journal of Coastal Life Medicine 2014年第2期 94-98页

作者： Senthamilselvan Devaraj chezhian Arulprakasam Arul Pandian Kandhan Kabilan Neelamegam Rajalakshmi Kalaiselvan Centre of Advanced Study in Marine Biology Faculty of Marine SciencesAnnamalai UniversityParangipettai-608502Tamil NaduIndia

Objective:To monitor the response of gills of Cyprinus carpio var. communis to LC_(50) levels of ammonia over a period of 96 h by bath exposure, using scanning electron microscopy (SEM). Methods: Cyprinus carpio procured from a local fish farm in Vadalore, Cuddalore District, Tamil Nadu, India were acclimatized under laboratory conditions for 20 d. Fish were placed into experimental tanks with 20 L of water and 22 mg/L ammonia. A total of 10 fish were collected from each experimental tank every 24 h for histopathological studies. Results:Histopathological studies showed these changes in the gills:secondary lamellar fusion, haemorrhage, oedema, epithelial hyperplasia, and chloride cell proliferation. Occasionally, multifocal necrosis of inter-lamellar regions of gill filaments but with no apparent haemorrhage was observed under electron microscopy. Conclusion:The present study shows that histopathological and ultrastructural alterations in gills are useful indicators for ammonia toxicity in Cyprinus carpio.

关键词： Ammonia toxicity Gill histology scanning electron microscopy Cyprinus carpio

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