Vol. 8, Issue 6 (2020)
Anatomical study of ethylene induced gum duct formation and scientific gum tapping technique in gum Karaya (Sterculiaurens Roxb.)
Author(s): Vidya Bhushan Kuruwanshi and Pratibha Katiyar
Abstract: Gums and resins occupy a prime place among Non-Wood Forest Produce (NWFP/NTFP) and are known to mankind since time immemorial. Gums are metabolic by-products of plant tissues either in normal course or often as a result of disease or injury to the bark or wood of certain plants and it cannot be re-enter with plant system. Gum Karaya (Sterculia urens Roxb.) is a dry deciduous tree belonging to the family Sterculiaceae distributed throughout India and Chhattisgarh. The impact of gum enhance ethephon was found significantly superior, regarding the production of biopolymers. The biological (anatomical), studies were done via taking the sample of soft (sapwood) after injecting the gum enhancer ethephon at different time intervals. It can observed that the application of ethephon enhance the process of gummosis due to formation of gum duct. The gum duct formation was observed in histological analysis of bark section within 2 hrs of ethephon treatment in gum Karaya. The histological changes indicated that the gum ducts lysigenously are present in the pith and cortex of the young stem of Sterculia urens but absent in the xylem. The commercial tapping of Karaya is done by blazing, peeling, or by making deep cuts at the base of the bole using an axe or a cycle. These methods often lead to the death of the tapped trees. On account of crude tapping methods and over exploitation the population of karaya trees has markedly declined. The harvesting method currently used are traditional and injurious due to which often obtained inferior quality of products. Hence, the study was undertaken in ICAR Network Project to develop the scientific tapping technique for sustainable harvesting in major gum producing tree of Chhattisgarh state to enhance the livelihood of the rural areas as well as to protect the plant and generate the revenue of the government. The chemical tapping method using ethephon and IAA injected by battery operated drill machine. However, temperature and relative humidity also play significant role in gum exudation. The ethephon @ 3.9% in 4 ml in two consecutive doses in 45-60 days intervals at high temperature in month of April to June was found significantly effective for maximum gum production during both the year 2015 and 2016. The physiochemical properties of exudated gum were investigated and gum was found to be mild acidic, least soluble in cold water but absorb water and swell, soluble in hot water but insoluble in organic solvent.
DOI: 10.22271/chemi.2020.v8.i6ah.11129
Pages: 2376-2382 | 420 Views 144 Downloads
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How to cite this article:
Vidya Bhushan Kuruwanshi, Pratibha Katiyar. Anatomical study of ethylene induced gum duct formation and scientific gum tapping technique in gum Karaya (Sterculiaurens Roxb.). Int J Chem Stud 2020;8(6):2376-2382. DOI: 10.22271/chemi.2020.v8.i6ah.11129
