What callus ?Name its colour

What callus ?Name its colour
  • 1 answers

Yogita Ingle 5 months, 2 weeks ago

Sieve plate (oblique transverse perforated septa) is present between the two sieve tube elements at their end wall. It is porous. Materials are transported through these pores. Callose deposited on the radius of pores during dropping season (autumn) of leaves, to form a thick layer. This is called Callus pad.
Sieve plate is protected by callus pad. It also prevented from bacterial infection and drought.

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