REVIEW published: 17 November 2015 doi: 10.3389/fpls.2015.01020 Edited by: Richard Sayre, New Mexico Consortium at Los Alamos National Labs, USA Reviewed by: Shan Lu, Nanjing University, China Bala Rathinasabapathi, University of Florida, USA *Correspondence: Zhihui Cheng [email protected] Specialty section: This