Comparative analysis of fruit aroma patterns in the domesticated wild strawberries "Profumata di Tortona" (F. moschata) and "Regina delle Valli" (F. vesca).

Strawberry is one of the most valued fruit worldwide. Modern cultivated varieties (Fragaria × ananassa) exhibit large fruits, with intense color and prolonged shell life. Yet, these valuable traits were attained at the cost of the intensity and the variety of the aroma of the berry, two characteristics highly appreciated by consumers.

The AtMYB11 gene from Arabidopsis is expressed in meristematic cells and modulates growth in planta and organogenesis in vitro.

In plants, MYB transcription factors play important roles in many developmental processes including cell cycle progression, cell differentiation, and lateral organ polarity. It is shown here that the R2R3-MYB AtMYB11 gene is expressed in root and shoot meristems and also in young still meristematic leaf and flower primordia of Arabidopsis. Knock-out atmyb11-I mutants and RNAi plants germinate faster, show a faster hypocotyl and primary root elongation, develop more lateral and adventitious roots, show faster development of the inflorescence, and initiate more lateral inflorescences and fruits than wild-type plants.

Expression analysis of anthocyanin regulatory genes in response to different light qualities in Arabidopsis thaliana.

In this work we analysed, at the transcript level, the response of Arabidopsis anthocyanin regulatory genes of the MYB (PAP1 and PAP2), bHLH (TT8, EGL3 and GL3) and WD40 (TTG1) families to white light in seedlings and to different light qualities in rosette leaves. Our experiments showed strong light induction of the MYB genes PAP1 and PAP2. In particular, the kinetics of PAP1 expression preceded those of PAP2 and all of the structural genes (CHS, DFR, F3H, LDOX), consistent with the hypothesis that it has a key role in light induction of anthocyanin biosynthesis.