Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Aphid Colonization Affects Gas Exchange and Nitrogen Concentration in Urban Ornamental Shrubs

Leopold Poljaković-Pajnik
* ORCID logo ,
Nataša Nikolić
,
Branislav Kovačević
ORCID logo ,
Verica Vasić
ORCID logo ,
Milan Drekić
,
Saša Orlović
,
Lazar Kesić
ORCID logo
Version 1 : Received: 28 November 2023 / Approved: 29 November 2023 / Online: 29 November 2023 (11:05:44 CET)

How to cite: Poljaković-Pajnik, L.; Nikolić, N.; Kovačević, B.; Vasić, V.; Drekić, M.; Orlović, S.; Kesić, L. Aphid Colonization Affects Gas Exchange and Nitrogen Concentration in Urban Ornamental Shrubs. Preprints 2023, 2023111845. https://doi.org/10.20944/preprints202311.1845.v1 Poljaković-Pajnik, L.; Nikolić, N.; Kovačević, B.; Vasić, V.; Drekić, M.; Orlović, S.; Kesić, L. Aphid Colonization Affects Gas Exchange and Nitrogen Concentration in Urban Ornamental Shrubs. Preprints 2023, 2023111845. https://doi.org/10.20944/preprints202311.1845.v1

Abstract

Shrubs are a significant component of urban vegetation residing in parks, but they experience various influences of biotic and abiotic agents, among which aphids play an important role. In this work, the effect of aphid colonization on three shrub species in urban environment was examined. Fourteen parameters have been analyzed, describing photosynthetic pigment content and gas exchange to carbon, nitrogen, and hydrogen partition. While no significant effect of colonization was found on photosynthetic pigment parameters, the effect was significant on gas exchange parameters. The strongest effect aphid colonization achieved on nitrogen partition and C/N ratio, parameters that could be suggested in further similar studies. All parameters were classified in two groups according to principal component analysis, suggesting correlation between nitrogen and carbon content, C/N ratio, measured gas exchange parameters and chlorophyll a content. The ratio between net photosynthesis and dark respiration (A/K) was in the second group, suggesting that this parameter provide additional information on the effect of aphid colonization, and deserve special attention in further studies. There were differences in reaction of examined shrub species, where the strongest reaction by gross primary productivity (GPP) achieved Hybiscus syriacus, and by nitrogen partition and C/N ratio Spirea trilobata and Cydonia japonica.

Keywords

aphids; shrubs; gas exchange; photosynthetic pigments; CHN partition

Subject

Biology and Life Sciences, Insect Science

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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