Induced Mutations in Ornamental Plants

A Highly Mutable GST is Essential for Bract Colouration in Euphorbia Pulcherrima Willd. Ex Klotsch

“…A majority of studies compared historical events for mostly shorter SSRs (2 and 3 bp repeats with larger repeat numbers) in present-day populations or the dynamic repeats responsible for human diseases (mostly trinucleotide repeats), which usually display effects beyond those of large numbers of repeats (> 30 repeats (Pearson et al, 2005)) Our observation that a large number of mutation events could be observed in the side shoots of ten irradiated plants indicates an unusually high mutation rate, which is in contrast to the few reports in which exact mutation rates have been reported for vegetatively propagated crops (Schum and Preil, 1998). In one example, the woody ornamental plant Tibouchina urvelliana was irradiated three independent times with a 45 Gy dose, resulting in 0.06% dwarf mutants each time (Schum and Preil, 1998 In this study, we showed that the poinsettia Bract1 gene is an active GST gene involved in the expression of anthocyanins in poinsettia bracts. Furthermore, a 4 bp deletion in a short repeat within the coding region of Bract1 is the most likely cause of many mutations that lead to a white bract colour.…”

Induction of novel variants through physical and chemical mutagenesis in Barbeton daisy (Gerbera jamesoniiHook.)

“…A wide range of solid or sectoral colour variants have been reported and released over the years (Nagatomi et al, 2000;Misra and Datta 2004;Son et al, 2006;Misra et al, 2007;Seneviratne and Wijesundara 2007). Overall, 55% of reports on induced mutations in ornamental plants concern changes in flower colour, and only 15% on flower morphology (Schum and Peril, 1998). Flower colour changes may be due to quantitative and/or qualitative changes in the colour pigments caused by mutations in their biosynthetic pathways or induced at independent loci that control flower colour (Ruminska and Zalewska, 2005).…”

“…The spectrum of mutations observed in ornamental plants includes features such as floral characteristrics (colour, size, morphology, fragrance), leaf characteristics (form, size, pigmentation), growth habit (compact, branching, climbing), physiological traits (photoperiodism), early flowering, free flowering, keeping quality, and tolerance of biotic or abiotic stresses (Schum and Peril, 1998). A combination of in vitro techniques and induced mutagenesis has been *Author for correspondence.…”

Improvement of Commercially Valuable Traits of Industrial Crops by Application of Carbon-based Nanomaterials

“…Thus, the global revenue from ornamental horticulture (floriculture) is projected to supersede the valuation of US $43.2 billion, registering a robust annual growth rate of 7%, in 2019. The early development of flowers and fruits, as well as an increase in the number of produced flowers, are common desired traits of commercially valuable crops 30–32 . It is well known that ideal ornamental crops should produce high-quality flowers and leaf characters including aesthetic features, pigmentation, and plant architecture such as compact shape and enhanced branching 32 .…”