scholarly journals Additional betalain accumulation by genetic engineering leads to a novel flower color in lisianthus (Eustoma grandiflorum)

2021 ◽  
Vol 38 (3) ◽  
pp. 323-330
Author(s):  
Eri Tomizawa ◽  
Shogo Ohtomo ◽  
Kanako Asai ◽  
Yuka Ohta ◽  
Yukako Takiue ◽  
...  
Keyword(s):  
Genetic Engineering ◽  
Flower Color ◽  
Eustoma Grandiflorum

Genetic engineering of flavonoid pigments to modify flower color in floricultural plants

2010 ◽  
Vol 33 (3) ◽  
pp. 433-441 ◽  
Author(s):  
Masahiro Nishihara ◽  
Takashi Nakatsuka
Keyword(s):  
Genetic Engineering ◽  
Flower Color

scholarly journals Susceptibility of Forty-six Lisianthus Cultivars to Fusarium Crown and Stem Rot

2000 ◽  
Vol 10 (4) ◽  
pp. 816-819 ◽  
Author(s):  
Brent K. Harbaugh ◽  
R. J. McGovern
Keyword(s):  
Flower Color ◽  
The United States ◽  
White Flower ◽  
Stem Rot ◽  
Color Group ◽  
Eustoma Grandiflorum ◽  
Deep Blue ◽  
Lack Of Information ◽  
Color Class ◽  
Serious Disease

Fusarium crown and stem rot, caused by Fusarium avenaceum (Fr.: Fr.) Sacc., is a serious disease of lisianthus [Eustoma grandiflorum Raf. (Shinn.)]. While more than 80 new cultivars of lisianthus have been released for sale in the United States in the last decade, there is a lack of information on their susceptibility to this pathogen. Forty-six cultivars of lisianthus were evaluated for their response to infection by F. avenaceum. Cultivars were grouped according to blue/purple, pink, or white flower colors and evaluated within their color class. Although some plants of all cultivars were susceptible to F. avenaceum, partial resistance was observed as indicated by differences in the length of time to symptom expression and in the frequency of diseased plants within each color group. In 21 of the 46 cultivars, 80 to 100% of the plants expressed symptoms within 55 days after inoculation. The lowest frequencies of diseased plants 55 days after inoculation were found in `Ventura Deep Blue' and `Hallelujah Purple' (25%), `Bridal Pink' (23%), and `Heidi Pure White' (53%) for the blue/purple, pink, and white flower color groups, respectively. Screening cultivars for resistance to F. avenaceum is the first step in breeding resistant cultivars. The methods we developed for these studies should be useful in screening for resistance. These results also may help growers select cultivars that are less susceptible to F. avenaceum, which should aid in the management of this disease.

scholarly journals Genetically engineered orange petunias on the market

2017 ◽  
Author(s):  
Hany Bashandy ◽  
Teemu H. Teeri
Keyword(s):  
Genetic Engineering ◽  
Flower Color ◽  
Genetically Engineered ◽  
Breeding Programmes

AbstractGenetic engineering of petunia was shown to lead to novel flower color some twenty years ago. Here we show that petunia lines with orange flowers, generated for scientific purposes, apparently found their way to petunia breeding programmes, intentionally or unintentionally. Today they are widely available, but have not been registered for commerce.

scholarly journals Correlation of pH and Light Intensity on Flower Color in Potted Eustoma grandiflorum Grise.

HortScience ◽  
1992 ◽  
Vol 27 (7) ◽  
pp. 817-818 ◽  
Author(s):  
R.J. Griesbach
Keyword(s):  
Light Intensity ◽  
Flower Color ◽  
High Light Intensity ◽  
High Light ◽  
Alkaline Ph ◽  
Color Intensity ◽  
Low Light ◽  
Eustoma Grandiflorum ◽  
Growing Cell

The environment can affect the intensity of flower color in Eustoma grandiflorum. Low light and alkaline pH within the growing cell can lead to reduced color intensity. Two independent causes are responsible for the decrease in the intensity of flower color. 1) Older flowers were more alkaline than freshly opened flowers. A 7% increase in pH was related with a 10% reduction in color intensity. 2) Flowers that open under low light were paler than those opening under high light intensity. A 25% decrease in light intensity was related to a 30% reduction in the concentration of anthocyanin and a 40% reduction in color intensity.

scholarly journals Evaluation of Forty-seven Cultivars of Lisianthus as Cut Flowers

2000 ◽  
Vol 10 (4) ◽  
pp. 812-815 ◽  
Author(s):  
Brent K. Harbaugh ◽  
Michelle L. Bell ◽  
Rongna Liang
Keyword(s):  
United States ◽  
Flower Color ◽  
The United States ◽  
Cut Flower ◽  
Cut Flowers ◽  
Eustoma Grandiflorum ◽  
Comparative Performance ◽  
Cultivar Groups ◽  
Postharvest Longevity ◽  
New Cultivars

Lisianthus [Eustoma grandiflorum (Raf). Shinn.] is emerging as an important cut flower in the United States while in European and Asian markets it is already listed among the top ten cut flowers. Many new cultivars have been released in the United States within the last 5 years, but comparative performance trials of these cultivars have been lacking. This trial evaluated 47 cultivars of lisianthus representing series (cultivar groups) that were marketed in the United States in 1998. Evaluations were made for rosetting, plug performance, cut-flower characteristics (vegetative and flowering attributes) as well as postharvest longevity of cut flowers. Significant differences among cultivars were found for all of the attributes evaluated. `Malibu Purple', `Catalina Blue Blush', and `Alice Pink' were selected as the best performers in the seedling (plug) stage since they had less than 5% rosettes, large leaves and a vigorous root system. Cultivars were placed in classes based on flower color, flower size, and number of petals (single or double flowers). Cultivars were ranked for each of the attributes and the total rank sum of all attributes (TRS) was used to select the best in class. Cultivars selected as best in class were `Malibu Purple', `Malibu Blue Blush', `Alice Purple', `Balboa Blue', `Avila Blue Rim', `Mellow Pink', `Flamenco Wine Red', `Flamenco Rose Rim', `Alice Pink', `Avila Rose' and `Echo Pink', `Alice White', and `Mariachi White'.

scholarly journals Genetic engineering as a way to obtain ornamental plants with a changed flower color

2020 ◽  
Vol 3 (1) ◽  
pp. 40-45
Author(s):  
V. Yu. Sannikova
Keyword(s):  
Genetic Engineering ◽  
Rapid Development ◽  
Ornamental Plants ◽  
Flower Color ◽  
World Market ◽  
Pigment Synthesis ◽  
New Varieties ◽  
Pigment Biosynthesis ◽  
Traditional Breeding ◽  
Color Modification

An important trend in the field of floriculture is the creation of new varieties of ornamental plants, among which varieties with unusual color are most in demand. To this end, traditional breeding and selection programs have been successfully applied for many years. However, currently genetic engineering is able to offer an alternative way to obtain new forms and varieties. Anthocyanins belonging to flavonoids, betalains and carotenoids are the main types of pigments that are synthesized in the plant and are responsible for the color of flower petals. The modification of pigment biosynthesis pathways using genetic engineering techniques can produce results that cannot be obtained by traditional breeding. This review presents the main advances in the application of genetic engineering techniques in floriculture using the example of flower color modification. There are several main areas of work with the genes of pigment biosynthesis. Among them, the strategy of suppressing gene expression is used most often. Expression of certain genes is suppressed to prevent pigment synthesis, or vice versa, to eliminate factors that hinder color development. The method of additional heterologous genes insertion to plants lacking them in the pathway of pigment biosynthesis is often used. Genomic editing, in particular by using the CRISPR/Cas system, is also used for color modification, but the application of this method to ornamental plants is a relatively recent innovation. Despite the rapid development of biotechnology, there are obstacles to the distribution of genetically modified plants on the world market. By addressing a number of problems, the production of transgenic ornamental plants may become economically more cost-effective and attractive than the development of new varieties exclusively through traditional breeding methods.

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