Flowering Plant, Flowering Tree.

Home :: Used By Humans :: Flower Development :: Resources :: Contact Us :: Hotel

Flower Development :

The molecular control of floral organ identity determination is fairly well understood. In a simple model, three gene activities interact in a combinatorial manner to determine the developmental identities of the organ primordia within the floral meristem. These gene functions are called A, B and C-gene functions. In the first floral whorl only A-genes are expressed, leading to the formation of sepals. In the second whorl both A- and B-genes are expressed, leading to the formation of petals. In the thrid whorl, B and C genes interact to form stamens and in the center of the flower C-genes alone give rise to carpels. The model is based upon studies of homeotic mutants in Arabidopsis thaliana and snapdragon, Antirrhinum majus. For example, in a loss of B-gene function mutant flower we get sepals in the first whorl asu usual, but also in the second whorl (the B-function lost that is needed for petal development). In the third whorl the lack of B function but presence of C-function mimics the fourth whorl, leading to the formation of carpels also in the third whorl. See also The ABC Model of Flower Development.

Most genes central in this model belong to the MADS-box genes and are transcription factors that regulate the expression of the genes specific for each floral organ.

Flowering transition :

The transition to flowering is one of the major phase changes that a plant makes during its life cycle. The transition must take place at a time that will ensure maximal reproductive success. To meet these needs a plant is able to interprate important endogenous and environmenal cues such as changes in plant hormones levels and seasonable temperature and photoperiodchanges. Many perennial plants require vernalization to flower. The molecular interpretation of these signals through genes such as CONSTANS and FLC ensures that flowering occurs at a time that is favorable for fertilization and the formation of seeds.

Flowers n Fruits: At Flowers N Fruits we believe in constantly meeting the different needs and budget of our customers. We guarantee delivery of order Send Flower, Gift to Mumbai today.we have special arrangements with Fruits , Chocolates , Dry fruits also. Send Flowers Mumbai through online www.flowersnfruits.com and gift flower delivery service all over Maharashtra and India.

Florist

Florimaya: Florimaya Florist for Your Wedding decorations help lend an aura of elegance and beauty to your wedding. Find the Florist who can produce your vision for your special day form www.florimaya.com. Florimaya design flowers and arrangements as per client request. Florimaya florist is provide you with arrangements and advice on how to use them.