Brief Communication

Photosynthetica

, Volume 49, Issue 3, pp 478-480

Leaf area expansion and net photosynthetic rate of three bromegrass (Bromus) species

  • B. BiligetuAffiliated withSemiarid Prairie Agricultural Research Centre, Agriculture and Agri-Food Canada
  • , B. CoulmanAffiliated withDepartment of Plant Sciences, University of Saskatchewan Email author 

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Abstract

This study measured individual leaf area expansion rate and leaf net photosynthetic rate (P N) of meadow bromegrass (Bromus riparius Rehm.), smooth bromegrass (Bromus inermis Leyss.) and hybrid bromegrass (B. riparius × B. inermis). Smooth bromegrass expanded individual leaf area 1.5 times faster than meadow bromegrass and hybrid bromegrass. P N was highest in smooth bromegrass, intermediate in hybrid bromegrass, and lowest in meadow bromegrass. Rapid growth of meadow bromegrass following defoliation compared to smooth bromegrass and hybrid bromegrass could not be explained by higher rates of these measured characteristics.

Additional key words

bromegrass forage regrowth