Phloem flow and sugar transport in Ricinus communis L. is inhibited under anoxic conditions of shoot or roots

• Published in: Plant, cell and environment Vol. 38; no. 3; pp. 433 - 447
• Main Authors: PEUKE, ANDREAS D, GESSLER, ARTHUR, TRUMBORE, SUSAN, WINDT, CAREL W, HOMAN, NATALIA, GERKEMA, EDO, VAN AS, HENK
• Format: Journal Article
• Language: English
• Published: United States Blackwell Scientific Publications 01.03.2015
• Subjects: anaerobic conditions; assimilate transport; Biological Transport; canopy; Carbohydrate Metabolism; carbohydrates; carbon; Carbon - metabolism; carbon-isotope composition; distance water transport; flooding; fumigation; hypoxia; isotopic signature; leaves; magnetic resonance imaging; membrane-permeability; mushrooms agaricus-bisporus; Nitrogen - pharmacology; organic-matter; Oxygen - metabolism; phloem; Phloem - drug effects; Phloem - metabolism; Plant Leaves - drug effects; Plant Leaves - metabolism; Plant Roots - drug effects; Plant Roots - metabolism; Plant Shoots - drug effects; Plant Shoots - metabolism; plants; rhizosphere; Ricinus; Ricinus communis; Ricinus communis - drug effects; Ricinus communis - metabolism; roots; sap; shoots; starch; Starch - metabolism; stress; sucrose; Water - metabolism; xylem; Xylem - drug effects; Xylem - metabolism; carbohydrates; xylem; phloem; flooding; isotopic signature; Ricinus
• ISSN: 0140-7791; 1365-3040; 1365-3040
• DOI: 10.1111/pce.12399

Anoxic conditions should hamper the transport of sugar in the phloem, as this is an active process. The canopy is a carbohydrate source and the roots are carbohydrate sinks. By fumigating the shoot with N₂or flooding the rhizosphere, anoxic conditions in the source or sink, respectively, were induce...