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I. Made up of sclerenchymatous cells II. Generally absent in primary phloem III. Much elongated and pointed Given above characters belongs to which of the following? |
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a) |
Phloem fibre |
b) |
Xylem fibre |
c) |
Companion cells |
d) |
Sieve cells |
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I. Made up of sclerenchymatous cells II. Generally absent in primary phloem III. Much elongated and pointed Given above characters belongs to which of the following? |
|||||||
|
a) |
Phloem fibre |
b) |
Xylem fibre |
c) |
Companion cells |
d) |
Sieve cells |
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(c) Phloem fibres (bast fibres) are made up of sclerenchymatous cells. These are generally absent in the primary phloem but are found in the secondary phloem. These are much elongated, unbranched and have pointed, needle like apices. The cell wall of phloem fibres is quite thick. At maturity, these fibres lose their protoplasm and become dead. Phloem fibres of jute, flax and hemp are used commercially |