Data/hora: 12/06/2024 15:46:13

Biblioteca(s): | Embrapa Cerrados; Embrapa Recursos Genéticos e Biotecnologia; Embrapa Semiárido.
Data corrente: | 07/12/2021
Data da última atualização: | 10/12/2021
Autoria: | LISEI-DE-SÁ, M. e; RODRIGUES‑SILVA, P. L.; MORGANTE, C. V.; MELO, B. P. de; LOURENCO, I. T.; ARRAES, F. B. M.; SOUSA, J. P. A.; GALBIERI, R.; AMORIM, R. M. S.; LINS, C. B. J. de; MACEDO, L. L. P. de; MOREIRA, V. J.; FERREIRA, G. F.; RIBEIRO, T. P.; FRAGOSO, R. da R.; SILVA, M. C. M. da; ALMEIDA-ENGLER, J. de; SA, M. F. G. de.
Afiliação: | MARIA E LISEI-DE-SÁ, Empresa de Pesquisa Agropecuária de Minas Gerais; PAOLO L. RODRIGUES‑SILVA, UCB; CAROLINA VIANNA MORGANTE, CPATSA; BRUNO PAES DE MELO, INCT PlantStress Biotech; ISABELA TRISTAN LOURENCO TESSUTTI, Cenargen; FABRICIO B. M. ARRAES, INCT PlantStress Biotech; JOÃO P. A. SOUSA, UCB; RAFAEL GALBIERI, Instituto Matogrossense do Algodão; REGINA M. S. AMORIM; CAMILA B. J. DE LINS; LEONARDO LIMA PEPINO DE MACEDO, Cenargen; VALDEIR J. MOREIRA, UNB; GILANNA F. FERREIRA; THUANNE P. RIBEIRO, INCT PlantStress Biotech; RODRIGO DA ROCHA FRAGOSO, CPAC; MARIA CRISTINA MATTAR DA SILVA, Cenargen; JANICE DE ALMEIDA-ENGLER, UMR Institut Sophia Agrobiotech INRA/CNRS/UNS, France; MARIA FATIMA GROSSI DE SA, Cenargen.
Título: | Pyramiding dsRNAs increases phytonematode tolerance in cotton plants.
Ano de publicação: | 2021
Fonte/Imprenta: | Planta, v. 254, 2021.
DOI: | https://doi.org/10.1007/s00425-021-03776-0
Idioma: | Inglês
Notas: | Na publicação: Isabela T. Lourenço-Tessutti; Leonardo L. P. Macedo; Rodrigo R. Fragoso; Maria C. M. Silva; Maria F. Grossi-de-Sa.
Conteúdo: | Root-knot nematodes (RKN) represent one of the most damaging plant-parasitic nematode genera worldwide. RNAi-mediated suppression of essential nematode genes provides a novel biotechnological strategy for the development of sustainable pest-control methods. Here, we used a Host Induced Gene Silencing (HIGS) approach by stacking dsRNA sequences into a T-DNA construct to target three essential RKN genes: cysteine protease (Mi-cpl), isocitrate lyase (Mi-icl), and splicing factor (Mi-sf), called dsMinc1, driven by the pUceS8.3 constitutive soybean promoter. Transgenic dsMinc1-T4 plants infected with Meloidogyne incognita showed a signifcant reduction in gall formation (57?64%) and egg masses production (58?67%), as well as in the estimated reproduction factor (60?78%), compared with the susceptible non-transgenic cultivar. Galls of the RNAi lines are smaller than the wild-type (WT) plants, whose root systems exhibited multiple welldeveloped root swellings. Transcript levels of the three RKN-targeted genes decreased 13- to 40-fold in nematodes from transgenic cotton galls, compared with those from control WT galls. Finally, the development of non-feeding males in transgenic plants was 2?6 times higher than in WT plants, indicating a stressful environment for nematode development after RKN gene silencing. Data strongly support that HIGS of essential RKN genes is an efective strategy to improve cotton plant tolerance. This study presents the frst application of dsRNA sequences to target multiple genes to promote M. incognita tolerance in cotton without phenotypic penalty in transgenic plants.
Palavras-Chave: | Fitonematóide; Interfering RNA; Nematóides das galhas.
Thesagro: | Algodão; Gossypium Hirsutum; Meloidogyne Incognita; Nematóide.
Thesaurus Nal: | Gene silencing.

Categoria do assunto:

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G Melhoramento Genético

Registro original: | Embrapa Semiárido (CPATSA)

Exemplares:

CENARGEN - (38683-1) - UPC - AP - DD -  -  -  - DIS
CPATSA - (59711-1) - UPC - AP - DD -  -  -  - DIS
CPAC - (37192-1) - UPC - AP - DD - DIGITAL -  - DIGITAL - DIS