Integrated physiological units in plants

Watson, Maxine A.

doi:10.1016/0169-5347(86)90005-4

Cited by 163 publications

(92 citation statements)

References 23 publications

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“…We assume that all the ramets that are connected can integrate fully, i.e., they form a single (Integrated Physiological Unit (IPU) (sensu Watson, 1986). In the Splitter, the IPU size is one ramet.…”

Section: Introductionmentioning

confidence: 99%

Ecology and Evolutionary Biology of Clonal Plants

Stuefer¹,

Erschbamer²,

Huber³

et al. 2002

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Section: Introductionmentioning

confidence: 99%

Ecology and Evolutionary Biology of Clonal Plants

Stuefer¹,

Erschbamer²,

Huber³

et al. 2002

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“…In the first case, the branch would share a root system with other branches. Experiments suggest that shoot-root connections can also be sectorial [31,36]. In that case, the branch would not have access to resources from the whole root system, only from a part of it ( Figure 1).…”

Section: Local Mechanisms and Integrationmentioning

confidence: 99%

External and internal control in plant development*

Oborny

2004

Complexity

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“…However, plants also acquire somatic mutations as they grow, and genetic mosaicism has been proposed as one method by which long-lived trees may resist rapidly evolving pests [21]. Analysis of the functional effect of internal diversity in plants has been assisted by decomposition of single plants into ramet-like domains called integrated physiological units (IPUs), modules within which production and consumption of resources is sharply constrained [22,23]. IPUs are typically aligned with morphological features such as branches, or flowers and their surrounding leaves.…”

Section: Introductionmentioning

confidence: 99%

Defining individual size in the model filamentous fungus Neurospora crassa

Song

Curran

et al. 2016

Proc. R. Soc. B.

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It is challenging to apply the tenets of individuality to filamentous fungi: a fungal mycelium can contain millions of genetically diverse but totipotent nuclei, each capable of founding new mycelia. Moreover, a single mycelium can potentially stretch over kilometres, and it is unlikely that its distant parts share resources or have the same fitness. Here, we directly measure how a single mycelium of the model ascomycete Neurospora crassa is patterned into reproductive units (RUs), meaning subpopulations of nuclei that propagate together as spores, and function as reproductive individuals. The density of RUs is sensitive to the geometry of growth; we detected 50-fold smaller RUs when mycelia had expanding frontiers than when they were constrained to grow in one direction only. RUs fragmented further when the mycelial network was perturbed. In mycelia with expanding frontiers, RU composition was strongly influenced by the distribution of genotypes early in development. Our results provide a concept of fungal individuality that is directly connected to reproductive potential, and therefore to theories of how fungal individuals adapt and evolve over time. Our data show that the size of reproductive individuals is a dynamic and environment-dependent property, even within apparently totally connected fungal mycelia.

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Integrated physiological units in plants

Cited by 163 publications

References 23 publications

Ecology and Evolutionary Biology of Clonal Plants

Ecology and Evolutionary Biology of Clonal Plants

External and internal control in plant development*

Defining individual size in the model filamentous fungus Neurospora crassa

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