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ERIC Number: EJ1004171
Record Type: Journal
Publication Date: 2013
Pages: 5
Abstractor: As Provided
Reference Count: 40
ISSN: ISSN-2168-8281
Mesophytic Root Responses to O[subscript 2]
Lynagh, Peter
Natural Sciences Education, v42 n1 p28-32 2013
Hypoxic and anoxic stresses on mesophytes cause a waste of plant productivity. Many phenotypic responses of roots to hypoxia have long been known, and now genotypic and biochemical responses are being elucidated. Hypoxia causes activation of dozens of specific genes that help the plant to survive hypoxia. It is now clear that mesophytes actively respond to O[subscript 2] or the lack thereof. The new understanding of O[subscript 2] responses could allow scientists to modify mesophytic plants for various O[subscript 2] concentrations. The most famous mesophytic root responses to hypoxia include decreased root growth, decreased root metabolism and the formation of aerenchyma. Additionally, mesophytes might increase adventitious roots, decrease their water uptake by decreasing aquaporin activity, and form partial barriers to radial oxygen loss (ROL). Soils that have low O[subscript 2], such as waterlogged soils, tend to be relatively reduced. The redox status of the soil has implications for plant nutrition, which roots actively manage. (Contains 1 table and 3 figures.)
American Society of Agronomy. 5585 Guilford Road, Madison, WI 53711. Tel: 608-273-8080; Fax: 608-273-2021; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Adult Education; Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A