External　stimuli　may　activate　the　stress　response　in　Arabidopsis　thaliana.　The　molecules　which　play　important　roles　in　the　stress　response　have　been　widely　studied.　However,　the　interactions,　especially　logic　interactions,　among　these　molecules,　need　to　be　studied.　In　this　paper,　logic　networks　are　constructed　based　on　gene　expression　profiles　of　Arabidopsis　under　the　normal　condition　and　four　different　stimuli　conditions,　respectively.　It　is　found　that　the　distribution　of　different　types　of　2-order　logics　in　the　gene　logic　network　under　the　normal　condition　is　different　from　the　others.　Furthermore,　the　logic　networks　of　genes　which　play　important　roles　are　constructed　and　their　dynamics　are　simulated.　It　is　then　observed　that　the　number　of　attractors　in　the　logic　network　for　Arabidopsis　under　the　normal　condition　is　less　than　those　under　four　external　stimuli.　It　is　also　observed　that　the　number　of　attractors　with　large　attraction　domain　in　the　logic　network　for　Arabidopsis　under　the　normal　condition　is　greater　than　those　under　four　external　stimuli.　The　results　show　that　the　distribution　of　different　types　of　2-order　logics　and　the　number　of　attractors　clearly　distinguish　logic　network　under　the　normal　condition　from　those　under　external　stimuli　conditions.　Our　studies　will　provide　the　theoretical　basis　for　experimental　studies　on　the　stress　response　of　Arabidopsis.