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Tree Gum: Gum Kondagogu

  • Rao Beedu SashidharEmail author
  • D. Raju
  • Rasineni Karuna
Reference work entry

Abstract

Tree gums are obtained as the natural exudates of different tree species and exhibit unique properties with a wide variety of applications. Commercially, gums have a separate niche in the world market as a commodity of international trade. These biopolymers are abundant, come from renewable sources, are relatively inexpensive and nontoxic, and are amenable to both chemical and biochemical modifications that find widespread and extensive food and nonfood applications. Most gums are heterogeneous polysaccharides with complicated structures and extremely high molecular masses. Major tree exudate gums include gum arabic, gum tragacanth, gum karaya, ghatti, and gum kondagogu. Exudate gums possess a unique combination of functionalities and properties that can never be matched by any other alternative synthetic polymers, which makes their complete substitution impossible. Importantly, these biopolymers are eco-friendly as they are biodeteriorable. Gum kondagogu is a naturally occurring nontoxic polysaccharide derived as an exudate from the bark of Cochlospermum gossypium (Bixaceae family), a native tree of India. To exploit its potential commercial applications, its morphological, structural, physicochemical, compositional, solution, conformational, rheological, emulsifying, and metal-biosorption properties have been elucidated. Gum kondagogu is an acidic gum with high content of uronic acid and the major functional groups identified in the gum are hydroxyl, acetyl, carbonyl, and carboxylic groups. The primary structure of this biopolymer contains sugars, such as arabinose, rhamnose, glucose, galactose, mannose, glucuronic acid, and galacturonic acid. Based on the spectroscopic categorization, the probable structural feature consigned to gum kondagogu is (1 → 2) β-d-Gal p, (1 → 6) β-d-Gal p, (1 → 4) β-d-Glc p A, 4-0-Me-α-d-Glc p A, (1 → 2) α-l-Rha, and (1 → 4) α-d-Gal p A.

The outcome of the experimental studies carried out with gum kondagogu has established its efficacy as a proficient biopolymer for (i) bioremediation of toxic metals, (ii) green synthesis of metal nanoparticles and magnetic iron oxide nanoparticles (MNP), (iii) mercury biosensor, and (iv) nanosilver-based antibacterial agent for medical applications. Additionally, appropriate chemical modification of the functional groups present in gum kondagogu may lead to the development of novel technologies for applications in pharmaceutical and food and biotechnology industries.

Keywords

Gum kondagogu Biosorption Bioremediation Nanoparticles ICP-MS SEM TEM Metals 

Abbreviations

AFM

Atomic force microscopy

Da

Dalton

EDAX

Energy-dispersive X-ray analysis

FTIR

Fourier transform infrared spectroscopy

GCC

Girijan Co-operative Corporation

GK

Gum kondagogu

h

Hour

ICP-MS

Inductively coupled plasma-mass spectrometry

kg

Kilogram

M+

Metal ion

mg g−1

Milligram per gram

MNP

Magnetic nanoparticles

MW

Molecular weight

nm

Nanometer

NMR

Nuclear magnetic resonance spectroscopy

NPs

Nanoparticles

SEM

Scanning electron microscopy

TEM

Transmission electron microscopy

UV

Ultraviolet

XRD

X-ray diffraction

μL

Microliter

Notes

Acknowledgment

Prof. Sashidhar Rao B wishes to acknowledge the contribution of his doctoral students, Janaki B, Vinod VTP, Ms. Aruna Jyoti K, and Ms. Lori Rastogi, in accepting to work on this novel biopolymer and contribute immensely to the contemporary scientific literature.

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Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Rao Beedu Sashidhar
    • 1
    Email author
  • D. Raju
    • 1
  • Rasineni Karuna
    • 1
  1. 1.Department of BiochemistryUniversity College of Science, Osmania UniversityHyderabadIndia

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