Which branch of botany deals with functional aspects of plants?

Explanation

Plants with desirable characters created through geene transfer methods are called transgenic plants .
Beneficial aspects : A. Transgenid crop plants are efficient because they have many beneficial traits like viruses resistance , insect resistance .
E.g : Papaya is resistant to papaya ring spot virus . Bt cotton is resistant to insects .
B. Transgenic plants are resistant to bacterial and fungal pathogens .
E.g : Transgenic Tomato plants are resistant to Pseudomonas bacterium . Transgenic potato is resistant to Fungas Phytophthera .
C. Transgenic plants which are suitable for good processing are produced with improved nutrional quality .
E.g : Transgenic Tomato "Flavar Savr" are bruise resistant suitable for storage and transport due to delayed ripering and offers higher shelf life . Transgenic Golden Rice "Taipei" is rich in vitamin -A , and prevent blindness.
D Transgenic plants are used for hybrid seed production .
E.g : Male sterile plants of Brassica napus are produced .This will be eliminate the problem of manual emasculation and reduces the cost of hybrid seed prduction .
E. Transgenic plants have been shown to express the genes of insulin , interferons , human , growth hormores , antibiotics and antibodies .
F. Transgenic plants are used to bloreactors for obtaining commercially useful products , specialized medicines and antibodies on large scale is called molecular farming .