Initiation of a region of tissue in a plant that is composed of one or more undifferentiated cells capable of undergoing mitosis and differentiation, thereby effecting growth and development of a plant by giving rise to more meristem or specialized tissue.

The establishment of an organism's body plan or part of an organism with respect to a single longitudinal plane. The pattern can either be symmetric, such that the halves are mirror images, or asymmetric where the pattern deviates from this symmetry.

The process resulting in the establishment of polarity along the adaxial/abaxial axis. Adaxial refers to being situated toward an axis of an anatomical structure. Abaxial refers to being situated away from an axis of an anatomical structure.

The specification of the meristem which will give rise to all post-embryonic above-ground structures of the plant as well as the non-root below-ground structures, such as rhizomes and tubers.

The process whose specific outcome is the progression of the integument over time, from its formation to the mature structure. Integument is one of the layers of tissue that usually covers the ovule, enveloping the nucellus and forming the micropyle at the apex.

The formation of the principal water-conducting tissue of a vascular plant.

Any process that activates or increases the rate or extent of cell proliferation.

Any process that results in a change in state or activity of a cell or an organism (in terms of movement, secretion, enzyme production, gene expression, etc.) as a result of an auxin stimulus.

The process that results in the patterns of cell differentiation that will arise in an embryo.

The establishment, maintenance and elaboration of the adaxial / abaxial axis. Adaxial refers to being situated toward an axis of an anatomical structure. Abaxial refers to being situated away from an axis of an anatomical structure.

The regionalization process in which differences in cell differentiation along the adaxial/abaxial are generated. Adaxial refers to being situated toward an axis of an anatomical structure. Abaxial refers to being situated away from an axis of an anatomical structure.

The regionalization process that results in defined areas around a point in which specific types of cell differentiation will occur.

The process in which the anatomical structures of the leaf are generated and organized.

The regionalization process that gives rise to the patterning of the conducting tissues. An example of this process is found in Arabidopsis thaliana.

The formation of the primary meristem or meristematic tissue that gives rise to the primary vascular tissue.

Any process involved in maintaining the identity, size and shape of a meristem.

Any process involved in maintaining the size and shape of a meristem.

The process whose specific outcome is the progression of phloem and/or xylem over time, from formation to the mature structure. An example of this process is found in Arabidopsis thaliana.

The process in which relatively unspecialized cells, e.g. embryonic or regenerative cells, acquire specialized structural and/or functional features that characterize the cells, tissues, or organs of the mature organism or some other relatively stable phase of the organism's life history. Differentiation includes the processes involved in commitment of a cell to a specific fate and its subsequent development to the mature state.

Any process that activates or increases the frequency, rate or extent of cell differentiation.

Determination of the identity of part of an organism or organ where those parts are of the type that occur in the dorsal region. Identity is considered to be the aggregate of characteristics by which a structure is recognized.

The developmental process by which a plant organ is generated and organized.

A membrane-bounded organelle of eukaryotic cells in which chromosomes are housed and replicated. In most cells, the nucleus contains all of the cell's chromosomes except the organellar chromosomes, and is the site of RNA synthesis and processing. In some species, or in specialized cell types, RNA metabolism or DNA replication may be absent.