Rhizodeposition under drought is controlled by root growth rate and rhizosphere water content

• Published in: Plant and soil Vol. 423; no. 1/2; pp. 429 - 442
• Main Authors: Holz, Maire, Zarebanadkouki, Mohsen, Kaestner, Anders, Kuzyakov, Yakov, Carminati, Andrea
• Format: Journal Article
• Language: English
• Published: Cham Springer 01.02.2018; Springer International Publishing; Springer Nature B.V
• Subjects: biodegradation; Biological activity; Biomedical and Life Sciences; carbon; Diffusion rate; Drought; Droughts; Ecology; Elongation; energy; Energy sources; Environmental aspects; Exudates; Growth; Growth rate; image analysis; Labeling; Life Sciences; Mathematical models; Microbial activity; Microorganisms; Moisture content; Mucilage; mucilages; Neutron radiography; neutrons; Plant growth; Plant Physiology; Plant Sciences; Radiography; radionuclides; Regular Article; rhizodeposition; Rhizosphere; root exudates; root growth; Roots; Roots (Botany); Soil microorganisms; Soil Science & Conservation; Soil water; soil water content; Spatial distribution; Temporal distribution; Water content; Neutron radiography; Rhizosphere extension; Root exudates; Mucilage; Convection–diffusion model; C imaging

Aims Rhizodeposition is an important energy source for soil microorganisms. It is therefore crucial to estimate the distribution of root derived carbon (C) in soil and how it changes with soil water content. Methods We tested how drought affects exudate distribution in the rhizosphere by coupling 14...