Full Text
(29 K)

Antioxidant Response to Cold Stress During Fiber Development

D.R. Gossett, S.W. Banks, M.C. Lucas, E.P. Millhollon


Ovules from flowers removed 2 d postanthesis (DPA) from field-grown Acala 1517-88 (AC-88) and Coker 312 (CO-312) were cultured either at a constant temperature of 30oC or at 18 DPA subjected to a temperature of 15oC for 15 h and then returned to 30oC. At 24 DPA the ovules were harvested and analyzed for antioxidant enzyme activity. Peroxidase and ascorbate peroxidase activities were similar in both cultivars, but cold stress appeared to cause a decrease in peroxidase activity in the ovules of both AC-88 and CO-312. Catalase, glutathione reductase, superoxide dismutase, and glutathione S-transferase activities ranged two- to three-fold higher in both the control and cold-stressed ovules of AC-88.

Reprinted from Proceedings of the 1996 Beltwide Cotton Conferences pp. 1175 - 1177
©National Cotton Council, Memphis TN

[Main TOC] | [TOC] | [TOC by Section] | [Search] | [Help]
Previous Page [Previous] [Next] Next Page
Document last modified Sunday, Dec 6 1998