2.7.8.8 anther isoform PSS1 promoter activity is prominent in developing anthers 723425 2.7.8.8 culm - 739446 2.7.8.8 embryo - 723425 2.7.8.8 flower - 738817 2.7.8.8 internode - 723504, 738817 2.7.8.8 internode especially the uppermost 739446 2.7.8.8 internode isozyme OsPSS-1 gene is expressed predominantly in elongating cells 739446 2.7.8.8 leaf - 739446 2.7.8.8 leaf low expression 723504 2.7.8.8 leaf vein - 723425