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qRT-PCR analysis of NtXTH gene expression in response to hormone treatments and abiotic stresses. Four-weeks-old common tobacco (K326) seedlings were treated with 150 mM NaCl (A), 50 mM Na2CO3 (B), 1 µM 2,4-epi-brassinolide (epiBL) (C), 1 µM IAA (D), 37 °C heat (E), and 4 °C chilling (F).
