A comparison of wild-type Arabidopsis thaliana and PA-deficient mutants finds that peroxidase activity is significantly over-activated in mutant seeds.
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Although >80% of species form arbuscular mycorrhizal symbioses, the roles of plant hormones in the associations are still being determined. Foo et al. critically review recent progress in our understanding of the roles of strigolactones, auxin, abscisic acid, ethylene, jasmonic acid and salicylic acid in mycorrhizal symbiosis, and present new evidence for a novel role for [...]
Sex-based differences in reproductive costs & non-equilibrium conditions both play important roles in affecting flowering sex ratios in angiosperm species.
El Ottra et al. conclude that the degree and diversity of fusions of floral organs in Galipeinae is unique within the order Sapindales.
This study finds that the ERECTA gene is implicated in the shade-avoidance signalling in a background-dependent manner.
The Australian legume Viminaria juncea forms both cluster roots and mycorrhizal associations. de Campos et al. manipulate P supply over a range of 0 to 50 mg P kg–1 dry soil in order to investigate if these root specializations are expressed at different shoot P concentrations [P]. Remarkably, they find that shoot [P] over the entire [...]
Gloxinia (Sinningia speciosa) is a popular ornamental plant with attractive, colourful flowers, but the genetic mechanisms that regulate flowering are largely unknown. Li et al. generate transgenic gloxinia plants that over-express or supress miR159, and determine that this leads to late and early flowering, respectively. miR159-mediated SsGAMYB expression affects the expression levels of SsLEAFY (SsLFY) and [...]