Fig. 4

Numbers of the 273 PgbZIP gene transcripts expressing across tissues, the roots of differently aged plants, and genotypes. a Percentage of the PgbZIP gene transcripts expressing in different numbers of tissues. The number of tissues from 0 through 14 are indicated by different colorful squares. b Percentage of the PgbZIP gene transcripts expressing in the roots of differently aged plants from 0 through 4. c Percentage of the PgbZIP gene transcripts expressing in four-year-old roots of different numbers of genotypes from 0 through 42. “0” indicates the numbers of the 273 PgbZIP gene transcripts did not express in any of the 14 tissues of the plant, the root of any of the four differently aged plants analyzed or any of the 42 genotypes analyzed