CO2 and Chamber Effects on Epidermal Development in Field-Grown Peanut (Arachis hypogaea L.) - American Journal of Plant Sciences

AJPS > Vol.8 No.3, February 2017

American Journal of Plant Sciences

Volume 8, Issue 3 (February 2017)

ISSN Print: 2158-2742 ISSN Online: 2158-2750

Google-based Impact Factor: 1.20 Citations h5-index & Ranking

CO₂and Chamber Effects on Epidermal Development in Field-Grown Peanut (Arachis hypogaea L.) ()

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Download as PDF (Size: 906KB) PP. 349-362

DOI: 10.4236/ajps.2017.83025 1,349 Downloads 2,290 Views Citations

Author(s)

D. C. Gitz III, J. T. Baker, H. Echevarria-Laza, P. Payton, J. R. Mahan, R. J. Lascano

Affiliation(s)

Cropping Systems Research Laboratory, ARS-USDA, Lubbock, TX, USA.

ABSTRACT

Peanut, (Arachis hypogaea L.) cvar. C76-16, was grown either in the field, or in open gas exchange chambers under elevated or ambient CO₂ concentrations. Stomatal density and other selected epidermal parameters associated with leaf development and gas exchange were measured on recently fully expanded canopy leaves. It was hypothesized that exclusion of solar UV by chambers would affect stomatal density, but no clear statistically significant chamber effect on stomatal density was found. However, elevated [CO₂] did lead to a reduction in both adaxial and abaxial stomatal developmental initiation and in stomatal density. Since each stomate was bounded by companion cells resulting from developmental events, non-random stomatal spacing as the “one cell spacing rule” appears to result from ontogeny rather than a long hypothesized chemical signal inhibiting adjacent meristemoid differentiation into guard cells. A method of visualizing epidermal patterns is also described.

KEYWORDS

Peanut, Stoma, Stomatal Density, Carbon Dioxide, Climate Change

Share and Cite:

Gitz III, D. , Baker, J. , Echevarria-Laza, H. , Payton, P. , Mahan, J. and Lascano, R. (2017) CO₂and Chamber Effects on Epidermal Development in Field-Grown Peanut (Arachis hypogaea L.). American Journal of Plant Sciences, 8, 349-362. doi: 10.4236/ajps.2017.83025.

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