Plasticity and ontogenetic drift of biomass allocation in response to above- and below-ground resource availabilities in perennial herbs: a case study of Alternanthera philoxeroides

Article

Geng, Yu-Peng, Pan, Xiao-Yun, Xu, Cheng-Yuan, Zhang, Wen-Ju, Li, Bo and Chen, Jia-Kuan. 2007. "Plasticity and ontogenetic drift of biomass allocation in response to above- and below-ground resource availabilities in perennial herbs: a case study of Alternanthera philoxeroides." Ecological Research. 22 (2). https://doi.org/10.1007/s11284-006-0017-9
Article Title

Plasticity and ontogenetic drift of biomass allocation in response to above- and below-ground resource availabilities in perennial herbs: a case study of Alternanthera philoxeroides

ERA Journal ID3235
Article CategoryArticle
AuthorsGeng, Yu-Peng (Author), Pan, Xiao-Yun (Author), Xu, Cheng-Yuan (Author), Zhang, Wen-Ju (Author), Li, Bo (Author) and Chen, Jia-Kuan (Author)
Journal TitleEcological Research
Journal Citation22 (2)
Year2007
Place of PublicationJapan
ISSN0912-3814
1440-1703
Digital Object Identifier (DOI)https://doi.org/10.1007/s11284-006-0017-9
Web Address (URL)http://www.springerlink.com/content/112404/
Abstract

Changes in plant biomass allocation in response to varying resource availabilities may result from ontogenetic drift caused by allometric growth (i.e., apparent plasticity), a true adjustment of ontogenetic trajectories (true plasticity) or both (complex plasticity). Given that the root allocation of annual species usually decreases during the growth, the developmentally explicit model predicts that annual herbs will exhibit true plasticity in root allocation under above-ground resource limitation and apparent plasticity for moderate stress of below-ground resource. For perennial species, the root allocation of which increases during growth, the reverse patterns would be expected.
In this study, we tested the developmentally explicit model with a perennial weed, Alternanthera philoxeroides (Mart.) Griseb. We report its adaptive changes and ontogenetic drift of root allocation in response to different resource levels (i.e., light, water and nutrient availability) by comparing root allocation on both an age and a size basis. The root allocation of A. philoxeroides increased with the size (i.e., ontogenetic drift) during the growth, and exhibited significant changes in response to different resource availabilities. Furthermore, the root allocation in response to water or nutrient availability exhibited typical complex plasticity, while the light stress only slowed down the growth, with the ontogenetic trajectory unchanged (apparent plasticity). The contrasting responses to above-ground and below-ground stresses were consistent with the prediction of the developmentally explicit model

Keywordsbiomass allocation; plasticity; ontogenetic drift: perennial; Alternanthera philoxeroides
ANZSRC Field of Research 2020310806. Plant physiology
310303. Ecological physiology
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Byline AffiliationsFudan University, China
Columbia University, United States
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https://research.usq.edu.au/item/9zw3v/plasticity-and-ontogenetic-drift-of-biomass-allocation-in-response-to-above-and-below-ground-resource-availabilities-in-perennial-herbs-a-case-study-of-alternanthera-philoxeroides

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