The selection of floral and reproductive traits is influenced by the plant’s abiotic environment, florivores and pollinators. Leroy et al.  show that mutualistic associations with ants can result in an enhanced reproductive allocation for the tank‐bromeliad Aechmea mertensii. They find that association with Camponotus femoratus results in more and larger inflorescences, more flowers and fruits, and [...]

Stomatal aperture is regulated by the stress-induced phyto-hormone abscisic acid (ABA), and by CO2 and Ca2+ concentrations. Hubbard et al. review the topic and propose models to explain the specificity of signalling for the common intermediate, intracellular Ca2+. These models are put in the context of recent research identifying ABA receptors. New genetic Ca2+-dependent protein kinase [...]