AI Article Synopsis
- Ongoing research is focused on identifying new natural molecules to enhance plant growth, with Mentha arvensis L. being a key source of menthol-rich essential oil used in various industries.
- Experimental comparisons of calliterpenone (CA) and gibberellic acid (GA3) on plant growth showed that CA treatment led to better overall growth, increased biomass, and higher essential oil production.
- The study indicates that CA enhances trichome density and oil biosynthesis, suggesting its potential as a natural growth promoter for improving crop yields and oil quality.
Article Abstract
Extensive research is going on throughout the world to find out new molecules from natural sources to be used as plant growth promoter. Mentha arvensis L. is the main source of menthol rich essential oil used commercially in various food, pharmaceutical and other preparations. Experiments were conducted on field grown plants for understanding the effect of calliterpenone (CA), a stereo-isomer of abbeokutone, in comparison to gibberellic acid (GA3) on growth attributes, trichomes, essential oil biosynthesis and expression of some oil biosynthetic pathway genes. The exogenous application of CA (1 μM, 10 μM and 100 μM) was found to be better in improving plant biomass and stolon yield, leaf area, branching and leaf stem ratio than with counterpart GA3 at the same concentrations. CA treated plants showed higher glandular trichome number, density and diameter and also correlated with enhanced oil biogenetic capacity as revealed by feeding labeled (14)C-sucrose for 72 h to excised shoots. Semi-quantitative PCR analysis of key pathway genes revealed differential up regulation under CA treatments. Transcript level of menthol dehydrogenase/menthone reductase was found highly up regulated in CA treated plants with increased content of menthone and menthol in oil. These findings demonstrate that CA positively regulated the yields by enhanced branching and higher density of trichomes resulting into higher accumulation of essential oil. The results suggest CA as a novel plant derived diterpenoid with growth promoting action and opens up new possibilities for improving the crop yields and essential oil biosynthesis in qualitative and quantitative manner.
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| http://dx.doi.org/10.1016/j.plaphy.2013.02.011 | DOI Listing |
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