All articles in Plants (ISSN 2223-7747) Vol 14, Issue 1, are now freely available to access, read and download: https://brnw.ch/21wQhmO COVER STORY: The accumulation of free proline in plants has been associated with stress tolerance and, more recently, with plant development, especially in reproductive and elongating organs. Despite the correlation between proline effects and accumulation, the evidence suggests that proline metabolism, rather than proline itself, is the main cause of its multip