Skip to main content
Recent Advancements of Biotechnology for improvement of Ornamentals
                  Ornamentals recognized as a vital part of the world’s natural heritage. They have great economic and cultural importance and potential, providing economic security for vast number of people throughout the world. A total of 409 ornamental varieties with new flower colour and chlorophyll variegation in leaves have been developed in different ornamental crops.
                   Recent advances in genetic engineering technology have opened up the possibility of manipulating the concentration of flower colour pigments in a highly controlled fashion. Petunia flower colour, pigmentation patterns and anthocyanin composition have been changed with sense or antisense constructs of the F3’5’H gene under the control of the CaMV 35S promoter.
                 Rapid development in molecular techniques for plant transformations, especially identification of ethylene biosynthesis pathways has opened the way for developing improved varieties with increased post-harvest longevity.
                 Reduction or elimination of flower colour pigments has been possible by sense and antisense has been developed for gene suppression. Sense constructs of the CHS and dihydro flavonol 4-reductase (DFR) genes were found to inhibit anthocyanin pigmentation, and sometimes to produce unusual and interesting patterns on flower petals.
                 Genetically engineering floral scent may also enhance the value of cut flowers to consumers. Several genes make the organs to produce secondary metabolites that will enhance floral scent and fruit flavor.
                   One of the recent exciting areas of genetic engineering is manipulation of flower shape. Deficiens genes and agamous genes isolated from Antirrhinum majus and A. thaliana have created novel flower shapes through molecular manipulation of floral homeotic genes.
                    No blue rose is in the nature, as it is in capable of synthesizing the blue pigment delphinidin due to deficiency of the enzyme dihydrokaempferol 3’5’ hydroxylase. Calgene pacific company at Melbourne, Japan, and Petunia Genetics group, France have collectively successfully isolated and standardized the technique to transfer the blue gene from petunia to roses.
                     Bioinformatics and Biotechnology  paving a widening path for the new era of research in the domain of Floriculture and creating wide spread research opportunities in the field of pigmentation and architecture of flowers.

Comments

Post a Comment

Popular posts from this blog

🍀HOME GARDEN🍀 Author:- G.keerthana

HOME GARDENING  Article by :- G.keerthana . Growing your own vegetables can be fun as well as rewarding. All you need to get started is - some decent soil and few plants and this way you provide fresh healthy vegetables.         My own home garden  A good home gardening plan may include selecting the right location, determining the size of the garden, deciding upon the types and varieties of vegetables to plant.  It must be noted that there are many vegetables that can be grown in pots. How to begin with Home Gardening: Site selection. Size of the garden. Deciding on what to grow. Location of vegetables in the garden. Time for plantation. Gardening images of my own garden: Uses of Home gardening:- Improve your health. Consuming more fresh fruits and vegetables is one of the most important things you can do to stay healthy. Save money on groceries. Get outdoor exercise. Gardening is a natural stress reliever. May lower the stress...
5 comments
Read more

GRAFT OR BUD UNION Author:- S.Hemanth

Physiology of graft (or) bud union formation   Article by:- S.Hemanth A. Characteristics of a functional graft union  Mechanical strength  Initially some sticking together of scion and stock is achieved by intercellular adhesion at first and intermingling of callus subsequently, but ultimately it is the interlocking of xylem fibers (wood) that results in a strong, permanent graft union.  Translocation   The structural integrity of the graft union not only holds the grafted plant together, but it is the reestablishment of anatomical and functional continuity between xylem and phloem that allows for translocation of water and minerals by the xylem, and conduction of carbohydrates and other organics by the phloem.    B. Sequence of graft union formation  Necrotic plate  The necrotic plate is a layer of desiccated, crushed cell walls at the cut surface of both stock and scion. Suberin (a waxy material) and pectin...
Post a Comment
Read more
INTRODUCTION OF ORCHID  Orchids are monocotyledonous, perennial herbs belonging to orchidaceae family Orchids are accepted to world’s most exotic & fascinating flowers Valued for their long spikes which display a variety of colours & long vase life  Ranks  first  in global trade of tropical cut flowers &  13th  in total cut flower trade in  international market   ORIGIN & DISTRIBUTION Ø    Ø     Orchidaceae - 800 genera & 25,000 sp.  around the world. Ø     India is home to about 1,300 sp. (about  800 sp. in NEH region ). Three major orchid growing regions  in the world- Ø            i ).  Tropical American Zone :   SE Brazil, NW  \ Bolivia, Western    Venezuela, Central America- Cattleya & Oncidium .        ...
Post a Comment
Read more