Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Spatio-temporal patterns of root growth in Nicotiana tabacum. (A) Set-up for root growth monitoring. (B) Original image and colour-coded distribution of relative elemental growth rates. (C) Instantaneous distributions of relative elemental growth rates at five different times throughout the diurnal course (night 2000–0800 h). (D) Growth velocity of the root tip (Vtip) during four typical diurnal courses (1-h mean values and variations).
