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i think it is vascular cambium layer............ :)
Meristematic tissue (vascular cambium) produces secondary growth. In plant stems, this serves to increase the diameter, and it forms between the primary xylem and phloem.
The two kind of vascular tissue angiosperms have would be the Monocot vascular bundles distributed througout the stem and the Dicot vascular bundles arranged in circles!
The primary growth in vascular plants takes place with the differentiation of vascular tissue from parenchymatous cells and the secondary growth takes place when the intra-vascular and inter vascular cambium adds to the secondary phloem and secondary xylem.
A plant's vascular system consists of vascular tissue. The vascular tissue is made up of xylem (transports water) and the phloem (transports sugars and other nutrients). Another component of the vascular system is the meristems: the vascular meristem and the cork cambium, both of which are sites of growth.
A plant's vascular system consists of vascular tissue. The vascular tissue is made up of xylem (transports water) and the phloem (transports sugars and other nutrients). Another component of the vascular system is the meristems: the vascular meristem and the cork cambium, both of which are sites of growth.
The function of vascular cambium in dicots is to give rise to new vascular tissue.
A plant's vascular system consists of vascular tissue. The vascular tissue is made up of xylem (transports water) and the phloem (transports sugars and other nutrients). Another component of the vascular system is the meristems: the vascular meristem and the cork cambium, both of which are sites of growth.
Periosteum
It gives rise to the vascular tissues of phloem and xylem. Thus it helps in the secondary growth of a plant.
Lateral meristems. Usually, vascular tissue is produced in the center of the stalk and grows outward continually. The vascular cambium is responsible for the new vascular tissue and the cork cambium produces new dermal coverings.
organogenesis: -production of UNIPOLAR structure (shoot OR root PRIMODIUM) -vascular system CONNECTED to parent tissue somatic embryogenesis: - production of BIPOLAR structure (shoot AND root axes) - vascular system NOT CONNECTED to parent tissue