... ofone of the CUL4 -based E3 ligase complexes, CUL4–DDB1–DDB2, in the control of genome integrity in response to UV radiation in Arabidopsis. Plants are in the precarious position of, on the one ... under controlled labora-tory conditions but only in the field, suggesting that anenvironmental factor is triggering the transition. As the transition from yellow, insect-pollinated flowers to red,bird-pollinated ... presented research on gene regulonsand regulatory pathways involved in freezing tolerance in Arabidopsis. Freezing tolerance increases in manyplants in response to low, non-freezing temperature,...