Abstract
Medicinal plants are in huge demand since the consumption is widespread and ever-increasing globally. The conventional breeding programs are generally environmental dependent; prone to different biotic and abiotic stresses as well as the secondary metabolite content is too low to harvest. In this context, developing polyploid individuals artificially would be a remarkable approach to increase vigor and attain this objective. Polyploids often exhibit some morphological features that are different or greater in forms than their diploid progenies. Polyploidization can be induced by quite a few antimitotic agents. The most frequently used antimitotic chemicals are colchicine, trifluralin, and oryzalin. The whole method of induced chromosome doubling consists of a series of steps, including an induction phase, regrowth phase, and a confirmation technique to evaluate the rate of achievement. The induction phase depends on different factors, such as explant types, antimitotic agents, its different concentrations, and exposure durations. To evaluate the accomplishment of polyploidization, morphological or anatomical observations are recorded as a rapid method. However, chromosome count and flow cytometry are the most eminent method for absolute confirmation. Despite significant prospects of polyploidization, there has been very little research on medicinal plants. The current review gives an overview of the different parameters of in vitro chromosome doubling, the history of the technique, and progress made over the last two decades.
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Abbreviations
- BA:
-
N6-benzyladenine
- BAP:
-
N6-benzylaminopurine
- Ca:
-
callus
- DMSO:
-
dimethyl sulfoxide
- IAA:
-
indole-3-acetic acid
- MS:
-
Murashige and Skoog (1962)
- Mult Sht:
-
multiple shoot
- NAA:
-
α-napthalene acetic acid
- NS:
-
nodal segment
- PGR:
-
plant growth regulator
- RT:
-
root tip
- SE:
-
somatic embryo
- ST:
-
shoot tip
- TDZ:
-
thidiazuron
- FCM:
-
flow cytometry
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Salma, U., Kundu, S. & Mandal, N. Artificial polyploidy in medicinal plants: Advancement in the last two decades and impending prospects. J. Crop Sci. Biotechnol. 20, 9–19 (2017). https://doi.org/10.1007/s12892-016-0080-1
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DOI: https://doi.org/10.1007/s12892-016-0080-1