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

Plant protection Pests Mango hopper (Tenemanchu purugu) ( Idioscopus clypealis , Idioscopus nitidulus   Amritodus atkinsoni   )             Damage is caused by sucking sap from tender leaves and inflorescence. Ovipositional punctures also cause damage to tender leaves and inflorescence. Severely infested leaves become curled and inflorescence gets dried. Affected parts are covered with honeydew and sooty mould. Control One spray with carbaryl @ 3 gms/litre of water in November before panicle  formation   ensuring  that tree trunks are also thoroughly drenched during the spray. During full length stage of panicle but before full bloom full bloom stage spraying with endosulfan @ 2 ml /litre of water or Dimethoate @ 2 ml /litre of water or imida cloprid @ 0.3 ml/ litre of water if incidence of hoppers is high (more than 5-10 per panicle).After fruit set at pea size stage spraying with imida c...
Post a Comment
Read more

POMEGRANATE INSECT PESTS AND DISEASES author:- swaroopa.v

pomegranate insect pests Article by:- swaroopa.v Anar butterfly/ Pomegranate fruit borer:- scientific name:- Virachola isocrates , Deudorix isocrates Family:-Lycaenidae order:-Lepidoptera Damage symptoms:- 👉Caterpillar bores into young fruits. 👉Feeds on internal contents (pulp and seeds). 👉Fruit rotting and dropping may occur. Fruit sucking Moth:- Scientific Name:- Othreis fullonica , Othreis materna Family:-Noctuidae Order:-Lepidoptera Damage symptoms:- 👉A circular pinhole like spot appears at the feeding site. 👉Later on, the area around the damaged portion turns yellowish-brown. 👉 The punctured fruits are easily infected with bacteria and fungi. As a result, the fruit rot and falls prematurely.  Diseases:- 1.Bacterial leaf and  fruit spot :- Disease symptoms:- 👉 appearance of one to several small water soaked,dark coloured irregular spots on leaves resulting in premature defoliation under severe cases. 👉 The pathogen also infects stem and br...
Post a Comment
Read more

TYPES OF SOILS IN INDIA YOU MUST KNOW

  TYPES OF SOILS IN INDIA YOU MUST KNOW                                                 -NAGA SPURTHI    INTRODUCTION As a horticulture or agriculture student we must identify the soils in order to know the productivity and other properties of soil. Here are the top soils and their easy identification :                                   1: Alluvial soil (43%) Colour: Light Grey to Ash Grey. Texture: Sandy to silty loam or clay. Rich in: potash Poor in: phosphorous. Crops : Wheat, rice, maize, sugarcane, pulses, oilseed etc are cultivated mainly. Area : covers 143 sq.km in India . Widespread in northern plains and river valleys. Properties. : Humus, lime and organic matter are...
1 comment
Read more