Difference between revisions of "IC4R006-Microarray-2014-24913626"
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==The Background of This Project== | ==The Background of This Project== | ||
| − | + | * Root growth into hypoxic or anoxic waterlogged substrates relies on internal diffusion of oxygen (Armstrong, 1979). The roots of waterlogging-tolerant species, such as rice (Oryza sativa), typically contain a large volume of aerenchyma. The aerenchyma provides a low-resistance pathway for diffusion of oxygen from the shoot base to the root tip (Armstrong, 1979). The roots of some wetland species, including rice, also possess a barrier to radial oxygen loss (ROL) within the basal zones (Armstrong, 1971; Visser et al., 2000; Colmer, 2003a; Garthwaite et al., 2003; Garthwaite et al., 2008; Abiko et al., 2012), so that ROL occurs predominately from short lateral roots (Armstrong and Armstrong, 2005) and the apical few centimetres of the main axes of adventitious roots (Fig. 1A). A barrier to ROL prevents loss of oxygen from the basal part of roots, which can enhance oxygen transport via the aerenchyma to the root tip. In the roots with an ROL barrier, oxygen at the root tip can be maintained at a higher level to allow root elongation into hypoxic/anoxic soil. The barrier might also impede entry of phytotoxins from chemically reduced water- logged soil. | |
== Labs working on this Project == | == Labs working on this Project == | ||
Revision as of 09:08, 22 June 2016
Contents
Project Title
Microarray analysis of laser-microdissected tissues indicates the biosynthesis of suberin in the outer part of roots during formation of a barrier to radial oxygen loss in rice (Oryza sativa)
The Background of This Project
- Root growth into hypoxic or anoxic waterlogged substrates relies on internal diffusion of oxygen (Armstrong, 1979). The roots of waterlogging-tolerant species, such as rice (Oryza sativa), typically contain a large volume of aerenchyma. The aerenchyma provides a low-resistance pathway for diffusion of oxygen from the shoot base to the root tip (Armstrong, 1979). The roots of some wetland species, including rice, also possess a barrier to radial oxygen loss (ROL) within the basal zones (Armstrong, 1971; Visser et al., 2000; Colmer, 2003a; Garthwaite et al., 2003; Garthwaite et al., 2008; Abiko et al., 2012), so that ROL occurs predominately from short lateral roots (Armstrong and Armstrong, 2005) and the apical few centimetres of the main axes of adventitious roots (Fig. 1A). A barrier to ROL prevents loss of oxygen from the basal part of roots, which can enhance oxygen transport via the aerenchyma to the root tip. In the roots with an ROL barrier, oxygen at the root tip can be maintained at a higher level to allow root elongation into hypoxic/anoxic soil. The barrier might also impede entry of phytotoxins from chemically reduced water- logged soil.
Labs working on this Project
- Department of Bioscience, Fukui Prefectural University, 4-1-1 Matsuoka-Kenjyojima, Eiheiji, Fukui 910-1195, Japan.
- Graduate School of Bioagricultural Sciences, Nagoya University, Furo-cho, Chikusa, Nagoya 464-8601, Japan.
- Graduate School of Agriculture and Life Sciences, University of Tokyo, 1-1-1 Yayoi, Bunkyo, Tokyo 113-8657, Japan.
- Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore.
- School of Plant Biology and Institute of Agriculture, The University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia.
- National Institute of Agrobiological Sciences, 2-1-2 Kannondai, Tsukuba, Ibaraki 305-8602, Japan.
- Research Institute for Bioresources and Biotechnology, Ishikawa Prefectural University, 1–308 Nonoichimachi, Ishikawa 921-8836, Japan.
Corresponding Author
Katsuhiro Shiono (email: shionok@fpu.ac.jp ) & Mikio Nakazono (email:nakazono@agr.nagoya-u.ac.jp)
