tailieunhanh - báo cáo khoa học: " Transcriptional regulatory network triggered by oxidative signals configures the early response mechanisms of japonica rice to chilling stress"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành y học dành cho các bạn tham khảo đề tài: Transcriptional regulatory network triggered by oxidative signals configures the early response mechanisms of japonica rice to chilling stress | Yun et al. BMC Plant Biology 2010 10 16 http 1471-2229 10 16 BMC Plant Biology RESEARCH ARTICLE Open Access Transcriptional regulatory network triggered by oxidative signals configures the early response mechanisms of japonica rice to chilling stress 1Ỷ 1Ỷ 1 I- 1 3 Kil-Young Yun Myoung Ryoul Park Bijayalaxmi Mohanty Venura Herath Fuyu Xu Ramil Mauleon c 4X A Z-A 1-4 A u-a -a l 4 I ir D D-AU -6 Dr rlz ZVA z lA3D I Cz Z A IZ A r Dzai zzxr1 t Edward Wijaya Vladimir B Bajic Richard Bruskiewich Benildo G de los Reyes Abstract Background The transcriptional regulatory network involved in low temperature response leading to acclimation has been established in Arabidopsis. In japonica rice which can only withstand transient exposure to milder cold stress 10 C an oxidative-mediated network has been proposed to play a key role in configuring early responses and short-term defenses. The components hierarchical organization and physiological consequences of this network were further dissected by a systems-level approach. Results Regulatory clusters responding directly to oxidative signals were prominent during the initial 6 to 12 hours at 10 C. Early events mirrored a typical oxidative response based on striking similarities of the transcriptome to disease elicitor and wounding induced processes. Targets of oxidative-mediated mechanisms are likely regulated by several classes of bZIP factors acting on as1 ocs TGA-like element enriched clusters ERF factors acting on GCC-box JAre-like element enriched clusters and R2R3-MYB factors acting on MYB2-like element enriched clusters. Temporal induction of several H2O2-induced bZIP ERF and MYB genes coincided with the transient H2O2 spikes within the initial 6 to 12 hours. Oxidative-independent responses involve DREB CBF RAP2 and RAV1 factors acting on DRE CRT rav1-like enriched clusters and bZIP factors acting on ABRE-like enriched clusters. Oxidative-mediated clusters were activated earlier than ABA-mediated