Successful field performance in warm and dry environments of soybean expressing the sunflower transcription factor HB4.

ABSTRACT: Soybean yield is limited primarily by abiotic constraints. No transgenic soybean with improved abiotic stress tolerance is commercially available. We transformed soybean plants with genetic constructs able to express the sunflower transcription factor HaHB4, which confers drought tolerance to Arabidopsis and wheat. One line (b10H) carrying the sunflower promoter was chosen among three independent lines because it exhibited the best performance in seed yield, and was evaluated in the greenhouse and in 27 field trials in different environments in Argentina. In greenhouse experiments, transgenic plants showed increased seed yield under stress conditions together with greater epicotyl diameter, larger xylem area, and increased water use efficiency compared with controls. They also exhibited en

SUBMITTER: Ribichich KF 

PROVIDER: S-EPMC7260725 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature