Role of plant hormone and signalling in plant architecture
Answers
Answer:
plant hormone plays an important role in life of plants it is only the hormones that lead to growth of hormone various plant hormone have their particular function.
Explanation:
Auxin
This hormone is present in the seed embryo, young leaves, and apical buds' meristem.
Functions of Auxins
Stimulation of cell elongation, cell division in cambium, differentiation of phloem and xylem, root initiation on stem cuttings, lateral root development in tissue culture
Delaying leaf senescence
Suppression of lateral bud growth when supplied from apical buds
Inhibition or promotion of fruit and leaf abscission through ethylene stimulation
Fruit setting and growth induced through auxin in some plants
Auxin can delay fruit ripening
In Bromeliads, the auxin hormone promotes flowering
Stimulation of flower parts, femaleness of dioecious flowers, and production of high concentration of ethylene in flowering plants
Cytokinin
They are synthesized in roots and then transported to other parts of the plant.
Functions of Cytokinins
Stimulation of cell division, growth of lateral buds, and apical dominance
Stimulation of shoot initiation and bud formation in tissue culture
Leaf cell enlargement that stimulates leaf expansion
Enhancement of stomatal opening in some plant species
Etioplasts converted into chloroplasts through stimulation of chlorophyll synthesis.
Ethylene
Ethylene is present in the tissues of ripening fruits, nodes of stems, senescent leaves, and flowers.
Functions of Ethylene
Leads to release of dormancy state
Stimulates shoot and root growth along with differentiation
Leaf and fruit abscission
Flower induction in Bromeliad
Stimulation of femaleness of dioecious flowers
Flower opening is stimulated
Flower and leaf senescence stimulation
Stimulation of Fruit ripening
Abscisic Acid
Abscisic acid is found mostly near leaves, stems, and unripe fruit.
Functions of Abscisic Acid
Stimulation of closing of stomata
Inhibition of shoot growth
Inducing seeds for synthesizing storage of proteins
Gibberellin
Gibberellins are present in the meristems of apical buds and roots, young leaves, and embryo.
Functions of Gibberellins
Stimulates stem elongation
Leads to development of seedless fruits
Delays senescence in leaves and citrus fruits
Ends seed dormancy in plants that require light for induction of germination