Keywords: Galaxy disks; Galaxy clusters; Field galaxies; Metallicity; Galaxy chemical evolution

1. INTRODUCTION

2. GALAXY SAMPLES  
2.1. GASP sample  
2.2. MaNGA sample  

3. DATA ANALYSIS  
3.1. GASP data analysis  
3.2. MaNGA data analysis  

4. RESULTS

5. MASS DEPENDENCE OF METALLICITY GRADIENTS

6. BEHAVIORS OF CLUSTER GALAXIES

7. CONCLUSIONS