Crystal structures of two phytohormone signal-transducing α/β hydrolases: karrikin-signaling KAI2 and strigolactone-signaling DWARF14

• 来源期刊: 细胞研究（英文版）
• 年，卷（期）: 2013,（3）
• 页码范围: 436-439
• 页数: 4页
• 语种: 英文
• DOI: 10.1038/cr.2013.19

摘要

Dear Editor, Karrikins and strigolactones (SL) are two classes of butenolide compounds that control many aspects of plant physiology.Karrikins,originally found in the smoke of forest fires,have the ability to stimulate seed germination [1].SL are endogenous plant hormones that mediate responses to low levels of soil nutrients,such as phosphate and nitrate [2].They promote root branching to increase nutrient uptake while inhibiting shoot branching to reduce nutrient demand.SL are also secreted from roots to stimulate symbiotic associations with arbuscular mycorrhizal fungi for increased nutrient uptake,signals that are exploited to induce seed germination in parasitic weeds,including Striga and Orobanche,which are major causes of crop losses [2].