Cytology, transcriptomics, and mass spectrometry imaging reveal changes in late-maturation elm (Ulmus pumila) seeds

QI Xiao-hong, Lulu Chen, Zijian Hu, Weiwei Shen, Huimin Xu, Lingyu Ma, Guangchao Wang, Yanping Jing, Xiaodong Wang, Bolin Zhang, Jinxing Lin