Effects of Cotyledonary Petiole Length and Incubation Period on Borassus flabellifer L. Haustorium Development
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Studies of palmyra palm haustorium development from the cotyledonary petioles lengths (<8, 9-16, 17-24, 25-32 and >33 cm) and incubation periods were investigated at Faculty of Science and Technology, Prince of Songkla University, Pattani Province, during June-September 2013. The results showed that the lengths of cotyledonary petiole at 17-24, and 25-32 cm could yield no difference in terms of haustorium weight, volume, width and firmness, although the length >33 cm could give more volume and width but the weight did not differ significantly. However, at the length <8 and 9-16 cm resulted in the lower weight and volume than the length 25-32 cm. The density, firmness and moisture content declinded when the cotyledonary petiole length increased. Incubation period from 0 to 4 months had effect on development of haustorium during the period of 1 month. Interaction between cotyledonary petiole length and incubation period was found on haustorium width and water content whereas no effect on weight, volume and firmness.
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