Corrigendum to: A starting guide to root ecology: strengthening ecological concepts and standardising root classification, sampling, processing and trait measurements (New Phytologist, (2021), 232, 3, (973-1122), 10.1111/nph.17572)

New Phytologist 232 (2021), 973–1122, doi: 10.1111/nph.17572. Since its publication, the authors of Freschet et al. (2021) have identified some errors in their article, as follows. On the title page, the affiliation for Štěpán Janěcek was incorrect. The correct affiliation is: Department of Ecology, Faculty of Science, Charles University, Vinicna 7, Prague 12801, Czech Republic. In section ‘XV. Root mechanics’ (p. 1050), the equation shown in the text (Eqn 10) is incorrect. The corrected equation is shown below. Finally, following a suggestion by a reader, Joseph Dubrovsky, Freschet et al. acknowledge that the term ‘secondary root’ mentioned in the section ‘IV. Below-ground plant entities and root classifications’ carries, in the current scientific literature, at least two distinct meanings, this of ‘adventitious root’, this of ‘first-order lateral root’ and is even sometimes used as a synonym of ‘secondary lateral root’. These multiple uses of the same term, originally coined to distinguish from ‘primary’ root, may therefore be considered as confusing, and caution should be exercised in the use of the term ‘secondary root’. We apologize to our readers for these mistakes. Section XV. Root mechanics (p. 1050) corrected text The MoE_L (i.e. resistance to being deformed elastically, and not to failure) is defined as the slope of the quasi-linear part (elastic zone) of the relationship when stress and strain are plotted together (Fig. 1b) which can be formalized as:Eqn 10 (Formula presented.) where (Formula presented.) is estimated as the linear slope at the beginning of a tensile test.