Scheffler, J.A., Romano, G.B. and Blanco, C.A. (2012) Evaluating Host Plant Resistance in Cotton (Gossypium hirsutum L.) with Varying Gland Densities to Tobacco Budworm (Heliothis virescens F.) and Bollworm (Helicoverpa zea Boddie) in the Field and Laboratory. Agricultural Sciences, 3, 14-23.

has been cited by the following article:

• TITLE: Evaluating Protective Terpenoid Aldehyde Compounds in Cotton (Gossypium hirsutum L.) Roots

  AUTHORS: Jodi A. Scheffler

  KEYWORDS: Cotton, Gossypol, Host Plant Resistance, Roots, Cotton Seed, Terpenoid Aldehyde

  JOURNAL NAME: American Journal of Plant Sciences, Vol.7 No.7, May 18, 2016

  ABSTRACT: Cotton (Gossypium hirsutum L.) has epidermal glands containing terpenoid aldehyde (TA) compounds that protect the plant from pests and diseases. One TA, gossypol, has two forms (+) and (-) that are present in varying amounts. This study evaluated the variation in roots for TA compounds and how environment affected the levels of these compounds. Similar to seed, gossypol was the predominant TA in roots. No heliocides were detected with only trace amounts of other TAs, such as hemigossypolone or hemigossypol, detected in a few lines. Among the glanded lines, there were significant differences in gossypol content. Percent plus gossypol was consistently 4% - 10% higher in roots than seed. One line, “Mac7”, had 12 - 14 ug/mg gossypol in roots and 18 ug/mg in seed as well as >90% (+) gossypol in both roots and seed. Unlike other tissues in glandless cotton, the roots of glandless lines consistently produced detectable amounts of gossypol with 77% to 82% in the (+) form. Multi-year field tests showed that although gossypol levels in the roots were more affected by insect pressure or other environmental conditions than seed, there was selectable variation in upland cotton for root gossypol content. Unlike other parts of a glandless plant, the roots retained a functioning biochemical pathway for gossypol production.