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Arabidopsispollen tube integrity and sperm release are regulated by RALF-mediated signaling

Ge, Zengxiang ; Bergonci, Tabata ; Zhao, Yuling ; Zou, Yanjiao ; Du, Shuo ; Liu, Ming-Che ; Luo, Xingju ; Ruan, Hao ; García-Valencia, Liliana E. ; Zhong, Sheng ; Hou, Saiying ; Huang, Qingpei ; Lai, Luhua ; Moura, Daniel S. ; Gu, Hongya ; Dong, Juan ; Wu, Hen-Ming ; Dresselhaus, Thomas ; Xiao, Junyu ; Cheung, Alice Y. ; Qu, Li-Jia


In flowering plants, fertilization requires complex cell-to-cell communication events between the pollen tube and the female reproductive tissues, which are controlled by extracellular signaling molecules interacting with receptors at the pollen tube surface. We found that two such receptors in Arabidopsis, BUPS1 and BUPS2, and their peptide ligands, RALF4 and RALF19, are pollen tube-expressed ...


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