Plants droop and shed their leaves when parched, but with a splash of water, their stems regain strength and their leaves unfurl. This dramatic transformation is a clear signal for us to reach for the watering can—and it demonstrates a delicate balance at the cellular level, which lies at the heart of a plant’s rigidity. Plants droop and shed their leaves when parched, but with a splash of water, their stems regain strength and their leaves unfurl. This dramatic transformation is a clear signal for us to reach for the watering can—and it demonstrates a delicate balance at the cellular level, which lies at the heart of a plant’s rigidity. Plants & Animals Cell & Microbiology Phys.org – latest science and technology news stories