Question: Give morphological
characters of an Angiospermic Plant.
Answer: An angiospermic plant
consists of vegetative organs, the roots, stem and branches and leaves and
reproductive organs, the flowers and fruit. Vegetative organs are meant for absorption
of raw material (water and minerals), manuface of food and its utilization for
growth and development. These organs are not directly connected with
reproduction; they may give rise to new plants. This method of reproduction
involving vegetative organs of the plant is termed as vegetative reproduction.
Roots are usually non green and grow under the soil. These anchor
the plant and absorb water and minerals from the soil. In certain instances
these act as storage organs e.g. Radish.
Stem forms the aerial axis of the plant. Stem axis elongates with
the help of terminal bud present at its apex. This stem bears branches, leaves
and flowers. Stem is responsible for conduction of absorbed material from root
to different plant parts, food manufactured in leaves and food storage in some
cases. It also bears flowers which are responsible for reproduction leaves are
usually green and are lateral outgrowth of stem and its branches. The place where
the leaf is attached to the stem is called a Node and the part of stem between
successive nodes is called an internode. Axillary space between a leaf and stem
or its branch is called axil of the leaf. In the axil of the leaves, buds
called axillary buds are found.
Each leaf usually consists of a stalk called petiole and an expanded
green potion known as lamina. In lamina a prominent median vein called mid rib
is present. Also many small veins are present.
Flowers vary in size, form and colour in
different species. Each flower is composed of four types of floral leaves, the
sepals, petals, stamens and corpels, arranged in whorls on thalamus. These
whorls are known as calyx, corolla, Androecium and Gynoecium. Sepals and petals
are together referred to as perianth. Each stamen consists of a filament and an
anther while each corpel is differentiated into a stigma, style and ovary.
Ovary contains small rounded or oval bodies, the ovules which develop into
seeds. The ovary on ripening forms fruit the seeds on germination produce
seedlings which develop into new plant.
0 Comments