1. Z-box Binding Factors in Light Signal-controlled Plant Growth and Development Sudip Chattopadhyay National Institute of Plant Genome Research New Delhi 110067 National Institute of Technology, Durgapur 713209 &

2. Arabidopsis seedling development SkotomorphogenesisPhotomorphogenesis DarkLight

3. Photomorphogenesis COP1 COP1, a master negative regulator of photomorphogenesis, acts as ubiquitin ligase Tumor Suppressor Protein: p53 (Mammals) Nature (2004)

4. basicLzip 177168 HY5, a positive regulator of photomorphogenesis

5. ZBF1/MYC2 acts as a negative regulator of blue light mediated seedling development Col atmyc2-3 atmyc2-2 0 1 2 3 4 5 6 7 Hypocotyl length (mm) BL fluence rate (  mol/sec/m 2 ) 5 15 20 30 Red lightFar-red light Blue light WT zbf1-1 (atmyc2-3) WT zbf1-1 (atmyc2-3) WT zbf1-1 (atmyc2-3) Blue light WT zbf1-2 (atmyc2-2) ZBF1/MYC2 1623 aa

6. Pphysically interactions with COP1 In vitro binding: Two-hybrid:

7. Physically interactions with COP1 Co-localization:

8. Regulation of genes in an additive or antagonistic manner

9. ZBF1/MYC2 acts as a negative regulator of blue light mediated seedling development Red lightFar-red light Blue light WT zbf1-1 (atmyc2-3) WT zbf1-1 (atmyc2-3) WT zbf1-1 (atmyc2-3) Col atmyc2-3 atmyc2-2 0 1 2 3 4 5 6 7 Hypocotyl length (mm) BL fluence rate (  mol/sec/m 2 ) 5 15 20 30 Blue light WT zbf1-2 (atmyc2-2)

10. Morphological defects in adult stage Flowering time Lateral root development WT zbf1-1

11. ABA (abiotic stress) WT zbf1-1 JA (biotic stress) Morphological defects in adult stage

12. Cloning and over-expression in tomato transgenic plants Transformed tomato plants