Development of an Efficient Virus Induced Gene Silencing Strategy in the Non-Model Wild Ginger-Zingiber zerumbet and Investigation of Associated Proteome Changes.
Zingiber zerumbet (Zingiberaceae) is a wild, tropical medicinal herb that shows a high degree of resistance to diseases affecting cultivated ginger. Barley stripe mosaic virus (BSMV) silencing vectors containing an endogenous phytoene desaturase (PDS) gene fragment were agroinfiltrated into young leaves of Z. zerumbet under controlled growth conditions to effect virus-induced gene silencing (VIGS). Infiltrated leaves as well as newly emerged leaves and tillers showed visual signs of PDS silencing after 30 days. Replication and systemic movement of the viral vectors in silenced plants were confirmed by RT-PCR. Real-time quantitative PCR analysis verified significant down-regulation of PDS transcripts in the silenced tissues. Label-free proteomic analysis was conducted in leaves with established PDS transcript down regulation and buffer-infiltrated (mock) leaves. A total of 474 proteins were obtained, which were up-regulated, down-regulated or modulated de novo during VIGS. Most of these proteins were localized to the chloroplast, as revealed by UniprotKB analysis, and among the up-regulated proteins there were abiotic stress responsive, photosynthetic, metabolic and membrane proteins. Moreover, the demonstration of viral proteins together with host proteins proved successful viral infection. We report for the first time the establishment of a high-throughput gene functional analysis platform using BSMV-mediated VIGS in Z. zerumbet, as well as proteomic changes associated with VIGS.
Division of Plant Molecular Biology, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala State, India-695014.
Chidambareswaren
C
Mahadevan
Proteomics Core Facility, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala State, India-695014.
Abdul
A
Jaleel
Institute of Bioresources and Sustainable Development, Imphal, Manipur, India-795001.
Lokesh
L
Deb
Division of Plant Molecular Biology, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala State, India-695014.
George
G
Thomas
Division of Plant Molecular Biology, Rajiv Gandhi Centre for Biotechnology, Thycaud, Thiruvananthapuram, Kerala State, India-695014.
Manjula
M
Sakuntala
D002736:Chloroplasts / Q000378:metabolism; D018506:Gene Expression Regulation, Plant; D020868:Gene Silencing; D020939:Zingiber officinale / Q000378:metabolism / Q000821:virology*; D009029:Mosaic Viruses / Q000201:enzymology / Q000235:genetics / Q000502:physiology*; D018515:Plant Leaves / Q000378:metabolism / Q000821:virology; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism*; D030821:Plants, Genetically Modified / Q000378:metabolism / Q000821:virology; D040901:Proteomics; D012328:RNA Viruses / Q000201:enzymology / Q000235:genetics / Q000502:physiology*; D014779:Virus Replication
D010940:Plant Proteins