Does free-floating carsharing reduce private vehicle ownership? The case of SHARE NOW in European cities.

During the last decade, the use of free-floating carsharing systems has grown rapidly in urban areas. However, little is known on the effects free-floating carsharing offerings have on car ownership in general. Also the main drivers why free-floating users sell their cars are still rarely analysed.

GABA signaling in plants: targeting the missing pieces of the puzzle.

The adaptation of plants to unstable environments relies on their ability to sense their surroundings and to generate and transmit corresponding signals to different parts of the plant to evoke changes necessary for optimizing growth and defense. Plants, like animals, contain a huge repertoire of intra- and intercellular signals, including organic and inorganic molecules. The occurrence of neurotransmitter-like signaling molecules in plants has been an intriguing field of research.

A Ca/CaM-regulated transcriptional switch modulates stomatal development in response to water deficit.

Calcium (Ca) signals are decoded by the Ca-sensor protein calmodulin (CaM) and are transduced to Ca/CaM-binding transcription factors to directly regulate gene expression necessary for acclimation responses in plants. The molecular mechanisms of Ca/CaM signal transduction processes and their functional significance remains enigmatic. Here we report a novel Ca/CaM signal transduction mechanism that allosterically regulates DNA-binding activity of GT2-LIKE 1 (GTL1), a transrepressor of STOMATAL DENSITY AND DISTRIBUTION 1 (SDD1), to repress stomatal development in response to water stress.

Root Plasticity in the Pursuit of Water.

One of the greatest challenges of terrestrial vegetation is to acquire water through soil-grown roots. Owing to the scarcity of high-quality water in the soil and the environment's spatial heterogeneity and temporal variability, ranging from extreme flooding to drought, roots have evolutionarily acquired tremendous plasticity regarding their geometric arrangement of individual roots and their three-dimensional organization within the soil. Water deficiency has also become an increasing threat to agriculture and dryland ecosystems due to climate change.

CALMODULIN-BINDING TRANSCRIPTION ACTIVATOR 6: A Key Regulator of Na Homeostasis during Germination.

Salinity impairs seed germination and seedling establishment. We investigated the role of Arabidopsis () CALMODULIN-BINDING TRANSCRIPTION ACTIVATOR 6 (CAMTA6) in salinity stress responses during early germination. Compared with the wild type, the and mutants were more tolerant to NaCl and abscisic acid (ABA) and accumulated less Na In contrast, 4- to 11-d-old seedlings were more sensitive to NaCl.