Photosynthetica

, 49:478 | Cite as

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

Brief Communication
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Abstract

This study measured individual leaf area expansion rate and leaf net photosynthetic rate (PN) 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. PN 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 

Abbreviations

gs

stomatal conductance

N

nitrogen

PN

net photosynthetic rate

PAR

photosynthetically active radiation

WUE

water-use efficiency

References

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Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Semiarid Prairie Agricultural Research CentreAgriculture and Agri-Food CanadaSwift CurrentCanada
  2. 2.Department of Plant SciencesUniversity of SaskatchewanSaskatoonCanada

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