Anatomical features of R. stylosa as affected by N deficiency and salt. Fresh, hand-cut, transverse sections of lateral roots, 1 cm from root tip, Bar ¼ 100 mm. All sections were
stained with phloroglucinol and hydrochloric acid to show lignification, red. In N deficiency (a, left) and control root (b, middle) sections, a slight lignification was detected, N
deficiency tent to reduce lignification within cell walls; while after 2 week exposure to salt, especially in high salt treatment (right, 400 mM NaCl) (c), significant increases of
lignification were observed. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.)