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Recently, the Rice Molecular Design Technology and Application Innovation Team of the Institute of Crop Science, Chinese Academy of Agricultural Sciences found that the distribution pattern of the plant hormone cytokinin changes rapidly under high-salt stress, accumulating from above-ground tissues to underground roots
Tong Hongning, a team member and a researcher at the Institute of Crop Science, Chinese Academy of Agricultural Sciences, said that the grain length of rice is closely related to its yield, and salt tolerance helps it grow on saline-alkali soils.
This study is the first to find that plants can respond to high-salt stress by adjusting the spatial distribution of cytokinins, thereby improving their adaptation to stress
The researchers introduced that, unlike the overall manipulation of hormone content, manipulation of hormone transport reflects a more economical and flexible principle, and is expected to overcome the contradiction between high yield and high resistance, so it has great potential in molecular design breeding
On this theoretical basis, the researchers found that overexpression of either AGO2 or BG3 could alter the spatial distribution of cytokinins and significantly increase grain length and salt tolerance in rice, thus validating the feasibility of this approach
