Effect of Simulated Grasshopper Grazing on CO2 Exchange Rates of Western Wheatgrass Leaves13
- 1 June 1979
- journal article
- research article
- Published by Oxford University Press (OUP) in Journal of Economic Entomology
- Vol. 72 (3) , 403-406
- https://doi.org/10.1093/jee/72.3.403
Abstract
Single, intact, fully-expanded leaves of western wheatgrass, Agropyron smithii Rydb., were mechanically damaged to simulate grasshopper feeding. When 4 cm long notches (ca. 25% of the leaf area) were removed from the base and tip of the blade, net photosynthetic rate (PN) per unit of remaining tissue was reduced by 31% within 1 h and remained at ca. this level over the next 6 days. Photorespiration (Rp) and dark respiration (RD) were unaffected by this treatment. Similar PN reductions occurred when a single notch was removed from the base of the leaf or when the top ⅓ of the blade was severed. Removal of a single notch from the tip end of the blade had little impact on PN. The immediate reduction in PN following simulated grazing does not appear to be related to a disruption in water supply to the tissue above the damaged area.This publication has 4 references indexed in Scilit:
- Reduction of Western Wheatgrass by the Feeding of Two Rangeland Grasshoppers, Aulocara elliotti and Melanoplus infantilis1Journal of Economic Entomology, 1978
- Grasshopper food habits within a shrub-steppe communityOecologia, 1977
- Effects of Partial Defoliation on Petiole Phloem Area, Photosynthesis, and 14C Translocation in Developing Soybean Leaves1Crop Science, 1977
- Plant‐Animal Interactions: Studies of the Effects of Grasshopper Grazing on Blue Grama GrassEcology, 1976