Calcium (Ca2+) is one of the most important second messengers in plant signalling, but high-level accumulation in cytosol causes toxicity. Now, a chloroplast calcium uniporter has been found to mediate Ca2+ influx from cytosol to chloroplast and, interestingly, regulate plant responses to osmotic stress.
- Enrico Teardo
- Luca Carraretto
- Ildiko Szabo
