Aluminum Alters the Histology and Pectin Cell Wall Composition of Barley Roots.

Aluminum (Al) is one of the most important crust elements causing reduced plant production in acidic soils. Barley ( L.) is considered to be one of the crops that is most sensitive to Al, and the root cell wall is the primary target of Al toxicity.

Rays, intrusive growth, and storied cambium in the inflorescence stems of Arabidopsis thaliana (L.) Heynh.

Arabidopsis thaliana is a model plant used in analysis of different aspects of plant growth and development. Under suitable conditions, secondary growth takes place in the hypocotyl of Arabidopsis plants, a finding which helps in understanding many aspects of xylogenesis. However, not all developmental processes of secondary tissue can be studied here, as no secondary rays and intrusive growth have been detected in hypocotyl.