EST 7 SSH 7 DNA library 4 DNA sequence 4 DNA, Complementary 4 Expressed Sequence Tags 4 Flowers 4 Gene Expression Profiling 4 Gene Expression Regulation, Developmental 4 Gene Expression Regulation, Plant 4 Gene Library 4 Helianthus 4 Helianthus annuus 4 Nucleic Acid Hybridization 4 Organ-specific transcripts 4 Plant Leaves 4 Plant Roots 4 Plant Stems 4 RNA 4 Reproducibility of Results 4 Sensitivity and Specificity 4 Sequence Analysis, DNA 4 Sunflower 4 agronomic trait 4 article 4 breeding 4 chemistry 4 comparative study 4 complementary DNA 4 controlled study 4