DEFINITIONS AND KEY POINTS FOR Growth & Plant Hormones

Botany No Comments

Terms Definitions

Growth : The quantitative increase in plant body is called growth.

Meristem: Meristents are young tissues or group of cells that retain the potential to divide.

Apical Meristems: The meristems present at the tips of roots and shoot are called apical meristems.

Intercalary
Meristems: The meristem situated at the bases of internodes is called intercalary meristem.

Lateral Meristems: The cylinders of dividing cells present in the vascular and cork tissue of the plants are called lateral meristems.

Primary Growth: In this growth. primary tissues are added by the apical meristem. It increases

the length of the plant.

Secondary Growth: In this growth, secondary tissues are added by the intercalary or vascular cambium. It increases the thickness of plant.

Plant hormone	The special substances produced by the plants which influence the growth and plant responses are ---------------------------- ---------------------------- called plant hormones. ,
Apical dominance	The phenomenon in which shoot apex inhibits the growth of lateral buds is called apical dominance.
Abscission	The falling of leaves, flowers and fruits is called abscission.
Tropism	The bending of plant organs like coleoptile. stem and root toward or away from stimulus due to unequal growth is called tropism.
Seed dormancy	The physiological inability of a seed to grow is called seed dormancy.
Rosette dwarf	The plants with very short stem and crowed leaves are called rosette plant.
Bolting	The rapid stein elongation of rosette plant is called bolting.
Fruit setting	The start of fruit growth after pollination is called fruit setting.
Morphogeneas	The differentiationof different tissueslike root. shoot from callous is called morphogenesis.
Leaf senescence	The degradative changes which lead to death of an organ or organism are called leaf senescence.
Tissue culture	The in vitrocultivation of any partof plant in nutrient medium is called tissue culture.
Callus	An undifferentiated group of cells is called callus.

Biology Boom