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Plant Foraging Strategies Driven by Distinct Genetic Modules : Cross-Ecosystem Transcriptomics Approach

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Title: Plant Foraging Strategies Driven by Distinct Genetic Modules : Cross-Ecosystem Transcriptomics Approach
Authors: Sugimura, Yusaku Browse this author
Kawahara, Ai Browse this author
Maruyama, Hayato Browse this author →KAKEN DB
Ezawa, Tatsuhiro Browse this author →KAKEN DB
Keywords: arbuscular mycorrhiza
field transcriptomics
gene coexpression network
foraging strategies
Issue Date: 2022
Publisher: Frontiers Media
Journal Title: Frontiers in plant science
Volume: 13
Start Page: 903539
Publisher DOI: 10.3389/fpls.2022.903539
Abstract: Plants have evolved diverse strategies for foraging, e.g., mycorrhizae, modification of root system architecture, and secretion of phosphatase. Despite extensive molecular/physiological studies on individual strategies under laboratory/greenhouse conditions, there is little information about how plants orchestrate these strategies in the field. We hypothesized that individual strategies are independently driven by corresponding genetic modules in response to deficiency/unbalance in nutrients. Roots colonized by mycorrhizal fungi, leaves, and root-zone soils were collected from 251 maize plants grown across the United States Corn Belt and Japan, which provided a large gradient of soil characteristics/agricultural practice and thus gene expression for foraging. RNA was extracted from the roots, sequenced, and subjected to gene coexpression network analysis. Nineteen genetic modules were defined and functionally characterized, from which three genetic modules, mycorrhiza formation, phosphate starvation response (PSR), and root development, were selected as those directly involved in foraging. The mycorrhizal module consists of genes responsible for mycorrhiza formation and was upregulated by both phosphorus and nitrogen deficiencies. The PSR module that consists of genes encoding phosphate transporter, secreted acid phosphatase, and enzymes involved in internal-phosphate recycling was regulated independent of the mycorrhizal module and strongly upregulated by phosphorus deficiency relative to nitrogen. The root development module that consists of regulatory genes for root development and cellulose biogenesis was upregulated by phosphorus and nitrogen enrichment. The expression of this module was negatively correlated with that of the mycorrhizal module, suggesting that root development is intrinsically an opposite strategy of mycorrhizae. Our approach provides new insights into understanding plant foraging strategies in complex environments at the molecular level.
Type: article
Appears in Collections:農学院・農学研究院 (Graduate School of Agriculture / Faculty of Agriculture) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

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