scholarly journals Niche determinants in a salamander complex: Does hybridism or reproductive parasitism explain patterns of distribution?

Ecosphere ◽  
2020 ◽  
Vol 11 (10) ◽  
Author(s):  
Peter B. Mills ◽  
Thomas J. Hossie ◽  
Dennis L. Murray
Keyword(s):  
Patterns Of Distribution ◽  
Reproductive Parasitism

Can environmental tolerances explain convergent patterns of distribution in endemic spring snails from opposite sides of the Australian arid zone?

2017 ◽  
Vol 51 (4) ◽  
pp. 605-624 ◽  
Author(s):  
Renee A. Rossini ◽  
Hannah L. Tibbetts ◽  
Roderick J. Fensham ◽  
Gimme H. Walter
Keyword(s):  
Arid Zone ◽  
Patterns Of Distribution ◽  
Spring Snails ◽  
Environmental Tolerances

scholarly journals Somatic deficiency causes reproductive parasitism in a fungus

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Alexey A. Grum-Grzhimaylo ◽  
Eric Bastiaans ◽  
Joost van den Heuvel ◽  
Cristina Berenguer Millanes ◽  
Alfons J. M. Debets ◽  
...  
Keyword(s):  
Neurospora Crassa ◽  
Experimental Evolution ◽  
Evolutionary Dynamics ◽  
Genetic Load ◽  
Wild Type ◽  
Fusion Frequency ◽  
Somatic Fusion ◽  
Extensive Variation ◽  
Reproductive Parasitism ◽  
Multicellular Organisms

AbstractSome multicellular organisms can fuse because mergers potentially provide mutual benefits. However, experimental evolution in the fungus Neurospora crassa has demonstrated that free fusion of mycelia favours cheater lineages, but the mechanism and evolutionary dynamics of this exploitation are unknown. Here we show, paradoxically, that all convergently evolved cheater lineages have similar fusion deficiencies. These mutants are unable to initiate fusion but retain access to wild-type mycelia that fuse with them. This asymmetry reduces cheater-mutant contributions to somatic substrate-bound hyphal networks, but increases representation of their nuclei in the aerial reproductive hyphae. Cheaters only benefit when relatively rare and likely impose genetic load reminiscent of germline senescence. We show that the consequences of somatic fusion can be unequally distributed among fusion partners, with the passive non-fusing partner profiting more. We discuss how our findings may relate to the extensive variation in fusion frequency of fungi found in nature.

Cell type- and brain structure-specific patterns of distribution of minibrain kinase in human brain

2004 ◽  
Vol 1010 (1-2) ◽  
pp. 69-80 ◽  
Author(s):  
Jerzy Wegiel ◽  
Izabela Kuchna ◽  
Krzysztof Nowicki ◽  
Janusz Frackowiak ◽  
Karol Dowjat ◽  
...  
Keyword(s):  
Human Brain ◽  
Brain Structure ◽  
Cell Type ◽  
Patterns Of Distribution
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