Long-distance control of potato storage organ formation by SELF PRUNING 3D and FLOWERING LOCUS T-like 1  

作　　者：SaloméPratand Botao Song Shenglin Jing Peng Jiang Xiaomeng Sun Liu Yu Enshuang Wang Jun Qin Fei Zhang SaloméPrat Botao Song 

机构地区：[1]National Key Laboratory for Germplasm Innovation&Utilization of Horticultural Crops,Huazhong Agricultural University,Wuhan,Hubei 430070,China [2]Key Laboratory of Potato Biology and Biotechnology(HZAU),Ministry of Agriculture and Rural Affairs,Wuhan,Hubei 430070,China [3]College of Horticulture and Forestry Science,Huazhong Agricultural University,Wuhan,Hubei 430070,China [4]Centro de Investigación en Agrigenomica(CRAG),CSIC-IRTA-UAB-UB,Cerdanyola,08193 Barcelona,Spain

出　　处：《Plant Communications》2023年第3期258-273,共16页植物通讯（英文）

基　　金：supported by the China Agricultural Research System(Potato,CARS-09);the National Natural Science Foundation of China(3161101332 and 31971988).

摘　　要：Plants program their meristem-associated developmental switches for timely adaptation to a changing environment.Potato(Solanum tuberosum L.)tubers differentiate from specialized belowground branches or stolons through radial expansion of their terminal ends.During this process,the stolon apex and closest axillary buds enter a dormancy state that leads to tuber eyes,which are reactivated the following spring and generate a clonally identical plant.The potato FLOWERING LOCUS T homolog SELF-PRUNING 6A(StSP6A)was previously identified as the major tuber-inducing signal that integrates day-length cues to control the storage switch.However,whether some other long-range signals also act as tuber organogenesis stimuli remains unknown.Here,we show that the florigen SELF PRUNING 3D(StSP3D)and FLOWERING LOCUS T-like 1(StFTL1)genes are activated by short days,analogously to StSP6A.Overexpression of StSP3D or StFTL1 promotes tuber formation under non-inductive long days,and the tuber-inducing activity of these proteins is graft transmissible.Using the non-tuber-bearing wild species Solanum etuberosum,a natural SP6A null mutant,we show that leaf-expressed SP6A is dispensable for StSP3D long-range activity.StSP3D and StFTL1 mediate secondary activation of StSP6A in stolon tips,leading to amplification of this tuberigen signal.StSP3D and StFTL1 were observed to bind the same protein partners as StSP6A,suggesting that they can also form transcriptionally active complexes.Together,our findings show that additional mobile tuber-inducing signals are regulated by the photoperiodic pathway.

关 键 词：POTATO Solanum tuberosum L. FLOWERING LOCUS T StSP3D TUBERIZATION tuber-inducing signal long-distance signaling 

分 类 号：S532[农业科学—作物学]