A grouping of biological cells in a plant with related functions. In a seed, plant embryo tissues and endosperm have distinct developmental identities.
A region maintaining cells that support continued plant growth and organ production. Floral reproductive development coordinates organ identity with changes in the activity and termination of its meristem.
A surface barrier that limits water exchange with the environment. Its development helps regulate drying, but varies between gametophytes, sporophytes and plant organs.
A pore with associated guard cells in the plant surface. Distribution and function differ among life-cycle stages and lineages; a liverwort air pore is not an equivalent regulated structure.
Reduction of stomatal aperture through changes in guard cell mechanics and turgor pressure. In ABA responses, regulated solute efflux promotes water loss from guard cells.
Conducting tissue transporting organic compounds and other materials between source and sink regions of a vascular plant.
Explanation of bulk assimilate transport from source to sink through hydrostatic pressure differences associated with solute loading and unloading.
Conducting tissue carrying water and dissolved materials through a vascular plant. Its anatomy and vulnerability to water stress affect plant stature, growth and survival.
An elongated water-conducting cell in xylem. Its transport and support roles help explain the hydraulic organization of many gymnosperms.
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