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The ABA receptor NtPYL6 promotes flavonol biosynthesis to enhance tobacco resistance to UV-B.

Plant physiology - 2 Jun 2026

Wang Zhong, Xu Li, Huang Haitao, Liu Yali, Liu Pingping, Jiang Jiarui, Xu Xin, Zhou Huina, Chen Qiansi, Li Xuemei, Gao Qian, Yang Jun

Abstract excerpt

ABA and flavonol accumulation protect plants against UV-B radiation damage. However, the molecular mechanism by which UV-B enhances ABA signaling to induce flavonol biosynthesis remains largely unknown. Here, we found that ABA receptor ntpyl6 (PYRABACTIN RESISTANCE 1-LIKE6) mutants are more sensitive to UV-B than the wild type and that UV-B significantly induces ABA accumulation and NtPYL6 expression in tobacco...

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Identifiers

PMID: 42052928
DOI: 10.1093/plphys/kiag257
PMCID: PMC13281938

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