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Micro RNA-induced gene silencing strategy for the delivery of siRNAs targeting Meloidogyne incognita in a model plant Nicotiana benthamiana.
Hada, Alkesh; Patil, Basavaprabhu L; Bajpai, Akansha; Kesiraju, Karthik; Dinesh-Kumar, Savithramma; Paraselli, Bheema; Sreevathsa, Rohini; Rao, Uma.
Afiliación
  • Hada A; Division of Nematology, ICAR-Indian Agricultural Research Institute, New Delhi, India.
  • Patil BL; ICAR-National Institute for Plant Biotechnology, New Delhi, India.
  • Bajpai A; Division of Basic Sciences, ICAR-Indian Institute of Horticultural Research, Bengaluru, India.
  • Kesiraju K; ICAR-National Institute for Plant Biotechnology, New Delhi, India.
  • Dinesh-Kumar S; ICAR-National Institute for Plant Biotechnology, New Delhi, India.
  • Paraselli B; Department of Plant Biology and The Genome Center, College of Biological Sciences, University of California Davis, Davis, CA, USA.
  • Sreevathsa R; Chemveda Life Sciences, Hyderabad, India.
  • Rao U; ICAR-National Institute for Plant Biotechnology, New Delhi, India.
Pest Manag Sci ; 77(7): 3396-3405, 2021 Jul.
Article en En | MEDLINE | ID: mdl-33786977
BACKGROUND: Occurrence of multiple biotic stresses on crop plants result in drastic yield losses which may have severe impact on the food security. It is a challenge to design strategies for simultaneous management of these multiple stresses. Hence, establishment of innovative approaches that aid in their management is critical. Here, we have introgressed a micro RNA-induced gene silencing (MIGS) based combinatorial gene construct containing seven target gene sequences of cotton leaf curl disease (CLCuD), cotton leaf hopper (Amrasca biguttula biguttula), cotton whitefly (Bemisia tabaci) and root-knot nematode (Meloidogyne incognita). RESULTS: Stable transgenic lines of Nicotiana benthamiana were generated with the T-DNA harboring Arabidopsis miR173 target site fused to fragments of Sec23 and ecdysone receptor (EcR) genes of cotton leaf hopper and cotton whitefly. It also contained C2/replication associated protein (C2/Rep) and C4 (movement protein) along with ßC1 gene of betasatellite to target CLCuD, and two FMRFamide-like peptide (FLP) genes, Mi-flp14 and Mi-flp18 of M. incognita. These transgenic plants were assessed for the amenability of MIGS approach for pest control by efficacy evaluation against M. incognita. Results showed successful production of small interfering RNA (siRNA) through the tasiRNA (trans-acting siRNA) pathway in the transgenic plants corresponding to Mi-flp18 gene. Furthermore, we observed reduced Mi-flp14 and Mi-flp18 transcripts (up to 2.37 ± 0.12-fold) in females extracted from transgenic plants. The average number of galls, total endoparasites, egg masses and number of eggs per egg mass reduced were in the range 27-62%, 39-70%, 38-65% and 34-49%, respectively. More importantly, MIGS transgenic plants showed 80% reduction in the nematode multiplication factor (MF). CONCLUSION: This study demonstrates successful validation of the MIGS approach in the model plant, N. benthamiana for efficacy against M. incognita, as a prelude to translation to cotton. © 2021 Society of Chemical Industry.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tylenchoidea / MicroARNs Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Pest Manag Sci Asunto de la revista: TOXICOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Tylenchoidea / MicroARNs Tipo de estudio: Prognostic_studies Límite: Animals Idioma: En Revista: Pest Manag Sci Asunto de la revista: TOXICOLOGIA Año: 2021 Tipo del documento: Article País de afiliación: India Pais de publicación: Reino Unido