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Updated: Jan 25, 2026

Live Confocal Imaging of Developing Arabidopsis Flowers
Published on: April 1, 2017
Expression of IbVPE1 from sweet potato in Arabidopsis affects leaf development, flowering time and chlorophyll
Jiaojiao Jiang1,2, Jianzhong Hu3,2, Rujiao Tan1
1Institute of Integrative Plant Biology, School of Life Science, Jiangsu Normal University, Xuzhou, 221116, China.
Background:
Since their discovery, vacuolar processing enzymes (VPEs) have consistently been investigated as programmed cell death (PCD) initiators and participants in plant development and responses to biotic or abiotic stresses, in part due to similarities with the apoptosis regulator caspase-1. However, recent studies show additional functions of VPE in tomatoes, specifically in sucrose accumulation and fruit ripening.
Results:
Herein, we evaluated the functions of VPE from sweetpotato, initially in expression pattern analyses of IbVPE1 during development and senescence. Subsequently, we identified physiological functions by overexpressing IbVPE1 in Arabidopsis thaliana, and showed reduced leaf sizes and numbers and early flowering, and elucidated the underlying molecular mechanisms.
Conclusions:
The present data demonstrate functions of the VPE gene family in development and senescence and in regulation of flowering times, leaf sizes and numbers, and senescence phenotypes in Arabidopsis thaliana.
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