Ground Tissue System
one tissue type - parenchyma
Parenchyma Tissue
simple tissue with one cell type - parenchymous
Parenchymous cells with amyloplasts, starch storing plastids,
found in the parenchyma tissue of cotelydons in a bean seed.
Close of up amyloplasts.
Amyloplasts stained with IKI.
This large reserve of starch in the cotyledon is used when the seed begins to germinate.
Sclerenchyma Tissue
simple tissue with two cell types - fibres or sclereids
A bundle of fibres pulled from Sansevieria.
Fibres after being separated from the bundle.
note: no picture of sclereids.
Vascular Tissue System
two tissue types - xylem and phloem
Xylem
complex tissue with four cell types - tracheids, vessels, parenchymous cells, & fibres
Phloem
complex tissue with three cell types - sieve elements, parenchymous cells, & fibres
Vascular bundle in stem of young Buttercup.
A stained vascular bundle.
The three regions of the vascular bundle are very distinct.
Within the xylem there are tracheids which have thinnings in their cell walls called pits.
The following three pictures are of Gymnosperm xylem.
Tracheids organized in xylem in a prepared slide. Note the pits.
With a longitudinal section of xylem, the rays of parenchymous cells
responsible for lateral transport of water & minerals can be seen.
This cross section shows a resin canal amongst tracheids in gymnosperm xylem.
The function of the resin canal is to store secondary
metabolites and secret them when damaged or under attack. (?)
The following three pictures are of Angiosperm xylem
These are two vessels amongst tracheids.
Note: the picture is rotated 180 degrees.
This shows rays amongst the tracheids and vessels.
Note: the picture is rotated 180 degrees.
This shows vessels in cross section amongst tracheids.
Dermal Tissue System
Epidermis
outer layer of cells that covers the entire primary body of a plant
Glandular trichome of geranium.
Stomata of germanium. Stomata is used for gas exchange in plants.
Thank you to Katherine Lin for the IKI stain picture.
Parenchyma Tissue
simple tissue with one cell type - parenchymous
Parenchymous cells with amyloplasts, starch storing plastids,found in the parenchyma tissue of cotelydons in a bean seed.
Close of up amyloplasts.
Amyloplasts stained with IKI.This large reserve of starch in the cotyledon is used when the seed begins to germinate.
Sclerenchyma Tissue
simple tissue with two cell types - fibres or sclereids
A bundle of fibres pulled from Sansevieria.
Fibres after being separated from the bundle.note: no picture of sclereids.
Vascular Tissue System
two tissue types - xylem and phloem
Xylem
complex tissue with four cell types - tracheids, vessels, parenchymous cells, & fibres
Phloem
complex tissue with three cell types - sieve elements, parenchymous cells, & fibres
Vascular bundle in stem of young Buttercup.
A stained vascular bundle.The three regions of the vascular bundle are very distinct.
Within the xylem there are tracheids which have thinnings in their cell walls called pits.The following three pictures are of Gymnosperm xylem.
Tracheids organized in xylem in a prepared slide. Note the pits.
With a longitudinal section of xylem, the rays of parenchymous cellsresponsible for lateral transport of water & minerals can be seen.
This cross section shows a resin canal amongst tracheids in gymnosperm xylem.The function of the resin canal is to store secondary
metabolites and secret them when damaged or under attack. (?)
The following three pictures are of Angiosperm xylem
These are two vessels amongst tracheids.Note: the picture is rotated 180 degrees.
This shows rays amongst the tracheids and vessels.Note: the picture is rotated 180 degrees.
This shows vessels in cross section amongst tracheids.Dermal Tissue System
Epidermis
outer layer of cells that covers the entire primary body of a plant
Glandular trichome of geranium.
Stomata of germanium. Stomata is used for gas exchange in plants.Thank you to Katherine Lin for the IKI stain picture.
Dear Midy Liou and Douglas Newbigging,
ReplyDeleteI found your website while I was studying about tracheid. And the images in your website helped me to understand them. The images are very clear and they really helped me. Thank you so much for your great work.
A teacher from Sri Lanka, Kandy.