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Histological studies on ginger rhizome (Zingiber officinale Rosc.)

Remashree, A.B.; Sherlija, K.K.; Unnikrishnan, K.; Ravindran, P.N.

Phytomorphology (Delhi) 47(1): 67-75

1997


ISSN/ISBN: 0031-9449
Accession: 002859576

The vascular pattern of the underground rhizome of ginger was studied at different stages of development. The internal structure of the rhizome showed an inner zone and an outer zone, separated by intermediate layers. Collateral vascular bundles were scattered but were more frequent in the inner zone. The xylem vessels have scalariform thickenings and scalariform perforation plates. Libriform fibres or rarely fibre tracheids are present. The phloem consisted of sieve tubes companion cells, parenchyma and fibres. Oil cells and canals are numerous. Numerous starch grains, varying in shape, size and number, were present on both sides of an intermediate zone. Rhizomes enlarged by: (i) activity in the primary meristem and procambial cells in the ground parenchyma, (ii) actively dividing ground parenchyma and (iii) activity of the secondary meristem in which the fusiform and ray initials are discrete. The presence of a cambium-like layer was an important feature found in ginger.

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