Question

what is protostele explain its types with diagram​

Answer 1

Protostele:

Jeffrey (1898), for the first time pointed out the stelar theory from the point of view of the phylogeny. According to him, the primitive type of stele is protostele. In protostele, the vascular tissue is a solid mass and the central core of the xylem is completely surrounded by the strand of phloem.

There are usually three basic types of protostele: haplostele – consisting of a cylindrical core of xylem surrounded by a ring of phloem.

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