Overexpression of a Brassica rapa MADS-box gene, BrAGL20, induces early flowering time phenotypes in Brassica napus

• Published in: Plant biotechnology reports Vol. 7; no. 3; pp. 231 - 237
• Main Authors: Hong, Joon Ki, Kim, Soo-Yun, Kim, Kwang-Soo, Kwon, Soo-Jin, Kim, Jung Sun, Kim, Jin A., Lee, Soo In, Lee, Yeon-Hee
• Format: Journal Article
• Language: English
• Published: Tokyo Springer Japan 01.07.2013; Springer Nature B.V; 한국식물생명공학회
• Subjects: Adaptations; Agriculture; Biomedical and Life Sciences; Biotechnology; Brassica napus; Brassica rapa; Cell Biology; Climate change; Crops; Cultivars; flowering; Flowers & plants; Gene expression; gene overexpression; genes; Genomics; Genotype & phenotype; Life Sciences; meristems; Original Article; Phase transitions; phenotype; Phenotypes; Plant Biochemistry; Plant biology; Plant Sciences; Planting season; Rape plants; Rural development; shoots; Studies; Sucrose; Transcription factors; Transgenic plants; Winter; 농학; United States > US; Early flowering time; MADS box; Floral integrator gene; Transgenic plants
• ISSN: 1863-5466; 1863-5474
• DOI: 10.1007/s11816-012-0254-z

BrAGL20 ( SOC1 ) containing MADS box, a floral integrator gene, was introduced into Brassica napus cv. “Youngsan” by Agrobacterium -mediated transformation. Constitutively overexpressed BrAGL20 under the CaMV 35S promoter induced early flowering time compared to the wild-type. These phenotypes were stably inherited through generations T 2 and T 3 , regardless of planting season. The expression of the floral meristem identity genes LFY and AP1 seemed to appear rapidly in the shoot apex region of transgenic plants showing the early flowering time phenotype. These results suggest that overexpression of BrAGL20 can significantly affect the flowering time of B. napus , and regulation of floral integrator gene expression could be applied for adaptation of crops to local environments and climate changes.