Open AccessTriallate absorption and metabolism in relationship to tolerance in wheat (Triticum aestivum and Triticum durum)
Author(s) -
Patrick M. McMullan,
John D. Nalewaja
Publication year - 1991
Publication title -
canadian journal of plant science/canadian journal of plant science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.338
H-Index - 59
eISSN - 1918-1833
pISSN - 0008-4220
DOI - 10.4141/cjps91-150
Subject(s) - coleoptile , shoot , agronomy , meristem , absorption (acoustics) , chemistry , biology , botany , physics , acoustics
Research was conducted to determine the influence of temperature on triallate absorption and metabolism in triallate-tolerant durum wheat (Triticum durum L. 'Monroe'), moderately tolerant Hard Red Spring (HRS) wheat (Triticum aestivum L. 'Coteau'), and susceptible HRS wheat, Alex. Uptake of 14 C-triallate by the shoot was greater at 24 than at 8 °C by all species. Triallate uptake as influenced by soil temperature is a factor affecting triallate phytotoxicity to wheat. However, Monroe shoot meristematic tissue contained more 14 C-label than Alex or Coteau, indicating that 14 C-label content in the meristematic tissue was not related to triallate tolerance. Further, the coleoptile tissue of Monroe contained less 14 C-label than Alex or Coteau. The coleoptile tissue did not prevent 14 C-label entry into shoot tissue. Coleoptile tissue did not seem to be a factor influencing triallate tolerance. 14 C-triallate concentration in the shoot related to triallate tolerance at both 8 and 24 °C. Triallate metabolism was apparently involved in differential tolerance among cultivars as the more tolerant Monroe and Coteau had more 14 C-metabolites than susceptible Alex. Key words: Wheat, triallate, herbicide, temperature, absorption, metabolism