Question

Using complete sentences, explain the significance of the following to plant biology. scarification allelopathy florigen micronutrients

Answer 1

Scarification:-Scarification is a process of inducing seed germination.It involves weakening or opening of seed coat to induce seed germination.It can be done mechanically,thermally and chemically.in mechanical scarification,with the help of hammer or knife the seed coat are become weak.In chemical scarification,acids and bases are used to induce germination.seed are soaked in respective acids and bases. Chemicals sulfuric acid and potassium nitrate plays vital role in scarification.In thermal scarification,heat is used to bring out scarification.

Allelopathy:- It is derived from greek word,Alleo and pathy means mutual harm and suffering.It refers to benificial or harmful of one plant to others.In this process organisms produces a biochemical know as allelochemicals which have both positive and negetive effects.negative effects helps plants to protect them from herbivore.

Florigen:-Julius von sachs in 1865 discovered florigen.It plays vital role in flowering of plants.This hormone is produced at the leaf of a plant.It act on shoot apical meristem of bud and growing tip.

Micronutrients:-micronutrients or trace elements are needed in very small amounts .these include iron,manganese,copper,molybdenum,zinc,boron,chlorine,and nickel.Iron is required in larger amount in comparison to other micronutrients.It is involved in the transfer of electrons like ferredoxin and cytochromes.