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Pyrus ussuriensis rootstocks improve scion potassium homeostasis by modulating lignin biosynthesis and ROS signaling under deficiency
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DOI：10.1016/j.scienta.2026.114933.png)
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Abstract
En 中文
• Under low‑K stress, P. ussuriensis rootstocks better maintain scion leaf K⁺ content, leaf area, and biomass than P. betulaefolia. • Transcriptomic analysis shows that efficient rootstocks regulate phenylpropanoid, flavonoid pathways and POD genes involved in lignin biosynthesis. • A regulatory model is proposed where ROS signaling and lignification mediated by rootstocks contribute to potassium use efficiency and scion growth.
Keywords:
Potassium utilization efficiency (KUE)
Plant stress
Pear
Lignin content
Scion-rootstocks
Micrografting
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