Effect of Ammonium Nitrate and Relative Humidity on Hyperhydricity in In Vitro Shoot Cultures of Eucalyptus Interspecific Hybrid (Eucalyptus camaldulensis Dehnh. X Eucalyptus pellita F.Muell.)

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Rattapum Roumunyamanee
Somkid Siripatanadilok
Sutee Duangjai

Abstract

In vitro shoot cultures of Eucalyptus interspecific hybrid (Eucalyptus camaldulensis Dehnh. X Eucalyptus pellita F. Muell.) have hyperhydricity problem in process therefore experimenting of suitable medium formula. A 3×4 in factorial designs in RCBD with two factors namely, ammonium nitrate concentration at three level (82.5 mgl-1, 165 mgl-1 and 330 mgl-1) and four levels of filter (0, 1, 2 and 3 pore) to create different relative humidity. After four weeks, record relative humidity, hyperhydricity rate and number of shoots were record, One week after subculture to root induction medium root induction rate, quantity of root and root elongation were record.


The results showed that root elongation was significantly influenced by ammonium nitrate. Hyperhydricity rate, number of shoots, root induction rate, quantity of root and survival rate were significantly influenced by relative humidity, Number of shoots were decreased when relative humidity was decrease. Subculturing hyperhydricity shoot into root induction medium caused undeveloped or poor root and the plant died when applied to transplanting it died.


Analysis of data showed that treatment MSc9 had ammonium nitrate 82.5 mgl-1 and relative humidity 78.66% as the treatment best of low hyperhydricity rate, many shoot, high root induction rate and many number of root. Reduction of ammonium nitrate concentration to half of the standard formula at 82.5 mgl-1 can reduce production costs of seedlings.

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How to Cite
Roumunyamanee, R., Siripatanadilok, S., & Duangjai, S. (2017). Effect of Ammonium Nitrate and Relative Humidity on Hyperhydricity in In Vitro Shoot Cultures of Eucalyptus Interspecific Hybrid (Eucalyptus camaldulensis Dehnh. X Eucalyptus pellita F.Muell.). Thai Journal of Forestry, 36(1), 22–32. Retrieved from https://li01.tci-thaijo.org/index.php/tjf/article/view/246863
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Original Articles

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