Advances and perspectives in discovery and functional analysis of small secreted proteins in plants Authors Xiao-Li Hu, Haiwei Lu, Md Mahmudul Hassan, Jin Zhang, Guoliang Yuan, Paul E. Abraham, Him K. Shrestha, Manuel I. Villalobos Solis, Jin-Gui Chen, Timothy J. Tschaplinski, Mitchel J. Doktycz, Gerald A. Tuskan, Zong-Ming (Max) Cheng and Xiaohan Yang Journal-Book Horticulture Research Year 2021