Các yếu tố phiên mã lớp I thuộc họ homeodomain-leucine zipper (HD-Zip) ATHB7 và ATHB12 điều chỉnh tín hiệu axit abscisic bằng cách điều tiết hoạt động của gen protein phosphatase 2C và gen thụ thể axit abscisic

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