These guard cells are in turn surrounded by subsidiary cells which provide a supporting role for the guard cells.
2.
The epidermis tissue includes several differentiated cell types; epidermal cells, epidermal hair cells ( trichomes ), cells in the stomatal complex; guard cells and subsidiary cells.
3.
The plant epidermis consists of three main cell types : pavement cells, guard cells and their subsidiary cells that surround the stomata and trichomes, otherwise known as leaf hairs.
4.
There were two small guard cells surrounded by two large similarly shaped subsidiary cells ( paracytic ) deriving from a pronounced elliptical cuticular ledge on the surface of the guard cells surrounding a thickened circumporal area.
5.
On November 3, 2014 BioTime's subsidiary Cell Cure Neurosciences received FDA authorization to initiate a phase I / IIa trial of OpRegen, an embryonic stem cell-derived treatment for the dry-AMD.
6.
The stomatal pores perforate the epidermis and are surrounded on each side by chloroplast-containing guard cells, and two to four subsidiary cells that lack chloroplasts, forming a specialized cell group known as the stomatal complex.
7.
However, the genus has an anatomical feature, laterocytic stomata ( having 3 or more parallel specialised subsidiary cells ), which it shares with the Platanaceae ( next closest relatives to the Proteaceae ) and no other Proteaceae, which indicate it diverged from all other members of the family first.
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