Animals, materials and methods
All experiments were approved by the regional board (Kunming Institute
of Botany, Chinese Academy of Sciences) in accordance with the Chinese
animal welfare law, as well as in accordance with local regulations and
the NRC Guide for the Care and Use of Laboratory Animals and approved by
the local Institutional Animal Care and Use Committee (the Animal Ethics
Committee of Kunming Institute of Botany, Chinese Academy of Sciences,
No. KIB-SMP-019).