Question

function of plastids ....​

Answer 1

Answer:

Plastids are double membrane-bound organelles found inside plants and some algae, which are primarily responsible for activities related to making and storing food. In plants, plastids may differentiate into several forms, depending upon which function they play in the cell. Undifferentiated plastids (proplastids) may develop into any of the following variants:

Chloroplasts: These plastids are green due to the presence of chlorophyll pigment, and hence are responsible for photosynthesis.

Chromoplasts: These are coloured plastids containing pigments other than chlorophyll, are found in fruits, flowers, roots, and stressed and aging leaves, and are responsible for their distinctive colors.

Leucoplasts: These are colourless non-pigmented plastids found in the non-photosynthetic parts of the plant, such as the roots, and may differentiate into more specialized plastids like-

Amyloplasts: used for storage of starch and gravity detection (geotropism).

Elaioplasts: used for fat storage.

Proteinoplasts: used for protein storage and modification.

Tannosomes: responsible for synthesizing and producing tannins and polyphenols

Answer 2

Answer:

Plastids are the cytoplasmic organelles found only in plant cells. On the basis of pigments present, plastids are of three types:

(i) Leucoplasts (colourless plastids)

(ii) Chloroplasts (green coloured plastids)

(iii) Chromoplasts (coloured plastids other than green).

Leucoplasts are for storage of starch grain and oil drops. Such colourless plastids are present in underground roots, stems.

Chloroplasts are mainly for photosynthesis. They are present in leaves.

Chromoplasts are responsible for the characteristic colour of flower and fruit. They are involved in attracting insects, various vectors for pollination and for fruit dispersal.

Explanation:

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