Harnessing anthocyanin-rich fruit: a visible reporter for tracing virus-induced gene silencing in pepper fruit

Cited 18 time in Web of Science Cited 16 time in Scopus
Kim, Jihyun; Park, Minkyu; Jeong, Eun Soo; Lee, Je Min; Choi, Doil
Issue Date
BioMed Central
Plant Methods, 13(1):3
VIGSPepperTRVReporter systemAn2AnthocyaninCapsaicinoid
Virus-induced gene silencing (VIGS) has become a powerful tool for post-genomic technology in plant species. This is important, especially in select plants, such as the pepper plant, that are recalcitrant to Agrobacterium-mediated transformation. Although VIGS in plants has been widely employed as a powerful tool for functional genomics, scattering phenotypic effects by uneven gene silencing has been implemented in order to overcome challenges in experiments with fruit tissues.

We improved the VIGS system based on the tobacco rattle virus (TRV) containing the An2 MYB transcription factor, which is the genetic determinant of purple colored- or anthocyanin-rich pepper. Silencing of endogenous An2 in the anthocyanin-rich pepper with the modified TRV vector for ligation-independent cloning (LIC) lacked purple pigment in its leaves, flowers, and fruits. Infection with TRV–LIC containing a tandem construct of An2 and phytoene desaturase (PDS) resulted in a typical photobleaching event in leaves without the purple pigment, whereas silencing of PDS led to the presence of photobleached and purple-colored leaves. Cosilencing of endogenous An2 and capsaicin synthase in fruits resulted in decreased levels of capsaicin and dihydrocapsaicin as assessed by high performance liquid chromatography analysis coupled with the absence of the purple pigment in fruits.

VIGS with tandem constructs harboring An2 as a visible reporter in anthocyanin-rich pepper plants can facilitate the application of functional genomics in the study of metabolic pathways and fruit biology.
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College of Agriculture and Life Sciences (농업생명과학대학)Dept. of Plant Science (식물생산과학부)Journal Papers (저널논문_식물생산과학부)
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