caa a22 4500 397570821 CHVBK 20180308164840.0 cr unu---uuuuu 161202e19960401xx s 000 0 eng 10.1093/ee/25.2.416 doi (NATIONALLICENCE)oxford-10.1093/ee/25.2.416 Injury by Hyalaphora cecropia (Lepidoptera: Saturniidae) and Photosynthetic Responses of Apple and Crabapple [Elektronische Daten] [Robert K. D. Peterson, Leon G. Higley, Stephen M. Spomer] The influence of arthropods on plant gas exchange processes, such as photosynthesis, water-vapor transfer, and respiration is important to characterize because these processes are crucial determinants of plant growth, yield, and fitness. Studies were conducted from 1992 through 1994 to characterize the gas exchange responses of apple, Pyrus malus L., (‘Jonathan') and crabapple, Pyrus coronaria L. (‘Liset‘ and ‘Spring Snow'), to simulated and actual leaf mass consumption larvae of the cecropia moth, Hyalophora cecropia (L.). Photosynthetic rates of injured crabapple leaves were not significantly different from uninjured leaves. Further, Spring Snow and Liset did not seem to respond differently to injury; leaves of both varieties were unaffected by injury. Photosynthetic rates of injured crabapple leaves were not significantly different from uninjured leaves 3, 27, or 75 h after the cessation of injury. Photosynthetic rates of injured apple leaves were not significantly different from uninjured leaves 3 or 24 h after the cessation of injury. Similarly, stomatal conductance and transpiration rates were not significantly different among treatments. Therefore, the principal effect of leaf mass consumption on photosynthetic responses of apple and crabapple was to reduce leaf area, not photosynthetic rates. Our results are consistent with other studies on different plant species that indicate gross leaf tissue removal does not affect photosynthetic rates of remaining leaf tissue. However, our findings contradict previously published results on apple. The potential reasons for these differences, particularly the role of intrinsic and extrinsic factors, are discussed. © 1996 Entomological Society of America Physiological and Chemical Ecology nationallicence Hyalophora cecropia nationallicence herbivory nationallicence gas exchange nationallicence defoliation nationallicence apple nationallicence crabapple nationallicence Peterson Robert K. D. Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583-0816 aut Higley Leon G. Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583-0816 aut Spomer Stephen M. Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583-0816 aut Environmental Entomology Oxford University Press 25/2(1996-04-01), 416-422 0046-225X 25:2<416 1996 25 ee https://doi.org/10.1093/ee/25.2.416 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1093/ee/25.2.416 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Peterson Robert K. D. Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583-0816 aut NATIONALLICENCE 700 1- Higley Leon G. Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583-0816 aut NATIONALLICENCE 700 1- Spomer Stephen M. Department of Entomology, University of Nebraska-Lincoln, Lincoln, NE 68583-0816 aut NATIONALLICENCE 773 0- Environmental Entomology Oxford University Press 25/2(1996-04-01), 416-422 0046-225X 25:2<416 1996 25 ee Metadata rights reserved CC BY-NC-4.0 http://creativecommons.org/licenses/by-nc/4.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-oxford