Water Stress and Seasonal Effects on Rubber Quality in Irrigated Guayule

William W. Schloman, Donald J. Garrot, Dennis T. Ray

Research output: Contribution to journalArticlepeer-review

12 Scopus citations


Guayule (line N396) was harvested monthly from January through July, 1984, from irrigated plots grown in Tucson, AZ. Irrigations were scheduled according to the crop water stress index (CWSI) to maintain three irrigation regimes. Plots were irrigated when their respective CWSI values reached or exceeded 0.3 (wet), 0.6 (medium), and 0.9 (dry). Individual plants from four replicated plots of each regime were analyzed for rubber molecular weight by gel permeation chromatography. The molecular weight (Mw) values for all three irrigation regimes increased from January through March during the plants’ winter quiescent period. Molecular weight decreased between March and April for all regimes when active growth resumed. By May, Mw had increased above March values. Between irrigation regimes, significant differences in Mw were observed only in January and June, with the dry plots yielding the highest molecular weight in both instances.

Original languageEnglish (US)
Pages (from-to)683-685
Number of pages3
JournalJournal of agricultural and food chemistry
Issue number4
StatePublished - 1986

ASJC Scopus subject areas

  • General Chemistry
  • General Agricultural and Biological Sciences


Dive into the research topics of 'Water Stress and Seasonal Effects on Rubber Quality in Irrigated Guayule'. Together they form a unique fingerprint.

Cite this