Chemical and Biological Technologies in Agriculture

Table 3 Correlation coefficients between flavonoid content and gene expression of BpR2R3-MYB15 and BpR2R3-MYB21

From: Genome-level analysis of BpR2R3-MYB family genes transcribed in seedlings of Betula platyphylla and BpR2R3-MYB15 enhanced flavonoid production

Treatment	Time/tissue	BpMYB15	BpMYB21
Daily cycle	12:00	− 0.12	− 0.78
	15:00	− 0.96	− 0.23
	18:00	− 0.69	− 0.04
	21:00	0.83	0.96
	0:00	− 0.88	− 0.16
	3:00	− 0.88	− 0.69
	6:00	0.49	− 0.72
	9:00	− 0.99*	0.19
	12:00	0.07	− 0.79
Control	Root	0.99*	− 0.95
	Stem	− 0.50	− 0.54
	Leaf	0.98*	0.57
Cd-1d	Root	− 0.93	0.96*
	Stem	0.25	0.99*
	Leaf	0.98*	− 0.28
Cd-4d	Root	− 0.49	− 0.31
	Stem	− 0.14	− 0.72
	Leaf	− 0.98*	0.93

Leaves of 18 decade-old B. platyphylla trees planted in Northeast Forestry University, which collected 3-h intervals on August 3–4 of 2020, were used for daily cycle analysis; leaves, stem, and root of 30-day-old seedlings of B. platyphylla were used for Cd treatment analysis

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