研究人员发现了一种小的激素，它能帮助植物在土壤在没有水分的情况下保持水分。研究表明水是稀缺时，肽 CLE25从根移动到叶子，有助于叶片表面气孔关闭而防止水分流失。

Newly discovered hormone helps keep plants from dehydrating

https://www.sciencedaily.com/releases/2018/04/180404133535.htm

1. Fuminori Takahashi, Takehiro Suzuki, Yuriko Osakabe, Shigeyuki Betsuyaku, Yuki Kondo, Naoshi Dohmae, Hiroo Fukuda, Kazuko Yamaguchi-Shinozaki, Kazuo Shinozaki. A small peptide modulates stomatal control via abscisic acid in long-distance signalling. Nature, 2018; DOI: 10.1038/s41586-018-0009-2