1. Gamma rays induced acquisition of structural modification in chitosan boosts photosynthetic machinery, enzymatic activities and essential oil production in citronella grass (Cymbopogon winterianus Jowitt).
- Author
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Ahmed KBM, Khan MMA, Jahan A, Siddiqui H, and Uddin M
- Subjects
- Acyclic Monoterpenes isolation & purification, Acyclic Monoterpenes metabolism, Aldehydes isolation & purification, Aldehydes metabolism, Carotenoids agonists, Carotenoids metabolism, Chitosan pharmacology, Chlorophyll biosynthesis, Cymbopogon growth & development, Cymbopogon metabolism, Gamma Rays, Oils, Volatile chemistry, Oils, Volatile metabolism, Photosynthesis physiology, Plant Growth Regulators pharmacology, Plant Leaves growth & development, Plant Leaves metabolism, Chitosan radiation effects, Chlorophyll agonists, Cymbopogon drug effects, Photosynthesis drug effects, Plant Growth Regulators radiation effects, Plant Leaves drug effects
- Abstract
Oligomers derived through irradiation of marine polysaccharides have generated a lot of interest of plant biologists as the application of these molecules has yielded positive results regarding various plant processes. To comprehend the previously established growth-promoting activity of irradiated chitosan (ICH) and to gain insight of the structure-property relationship, gamma rays induced structural changes were analyzed using techniques such as Fourier Transform Infrared (FT-IR) spectroscopy, Ultraviolet-visible (UV-Vis) spectroscopy,
13 C-Nuclear Magnetic Resonance (NMR) spectroscopy and Scanning Electron Microscopy (SEM). Moreover, to study the bioactivity of ICH samples a pot experiment was conducted on citronella grass (Cymbopogon winterianus) to access its response to foliar application of various levels (40, 60, 80 and 100 mg L-1 ) of ICH in terms of growth, physiological attributes and essential oil (EO) production. The application of ICH at 80 mg L-1 (ICH-80) resulted in the maximum values of most of the attributes studied. Due to this treatment, the maximum improvement in the content (29.58%) and yield (90.81%) of EO in Cymbopogon winterianus were achieved. Gas chromatography-mass spectrometry (GC-MS) analysis revealed that ICH-80 also increased the content of citronellal (14.81%) and geraniol (18.15%) of the EO as compared to the control., Competing Interests: Declaration of competing interest None., (Copyright © 2019 Elsevier B.V. All rights reserved.)- Published
- 2020
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