The possible role of BAX and BI-1 genes in chilling-induced cell death in cucumber fruit

Physiological, molecular and ultrastructural analyses during ripening and over‐ripening of banana (Musa spp., AAA group, Cavendish sub‐group) fruit suggest characteristics of programmed cell death

“…PCD processes have been extensively studied in flower petals and vegetative tissues . There are very limited reports on PCD events in fleshy fruits including heat‐induced PCD in tomato, ethylene induced PCD in immature cucumber, and CI‐induced PCD in cucumber . None have addressed the occurrence of PCD‐like events during ripening and over‐ripening in fleshy fruits.…”

Comparison of tissue deterioration of ripening banana fruit (Musa spp., AAA group, Cavendish subgroup) under chilling and non‐chilling temperatures

“…In fleshy fruits, PCD has been induced by heat treatments in tomato fruit and by exogenous ethylene exposure in immature cucumber . PCD symptoms have also been induced in immature cucumber fruit by exposure to low temperatures . In cucumber fruit, DNA degradation, chromatin condensation, and ethylene and Ca 2+ signaling were involved in the induction and progression of CI‐induced PCD .…”

“…Expression of BAX, a pro‐apoptotic protein, was higher in chill‐induced death at 2 °C . Gene expression of BAX and BI‐1 (Bax inhibitor‐1, a cell death suppressor) was synchronized with initiation of CI symptoms …”

“…[16][17][18] PCD symptoms have also been induced in immature cucumber fruit by exposure to low temperatures. 19,20 In cucumber fruit, DNA degradation, chromatin condensation, and ethylene and Ca 2+ signaling were involved in the induction and progression of CI-induced PCD. 20 Expression of BAX, a pro-apoptotic protein, was higher in chill-induced death at 2 ∘ C. 19,21 Gene expression of BAX and BI-1 (Bax inhibitor-1, a cell death suppressor) was synchronized with initiation of CI symptoms.…”

“…19,20 In cucumber fruit, DNA degradation, chromatin condensation, and ethylene and Ca 2+ signaling were involved in the induction and progression of CI-induced PCD. 20 Expression of BAX, a pro-apoptotic protein, was higher in chill-induced death at 2 ∘ C. 19,21 Gene expression of BAX and BI-1 (Bax inhibitor-1, a cell death suppressor) was synchronized with initiation of CI symptoms. 19 Aside from immature cucumber fruit, no other fleshy fruit has been evaluated for CI-induced PCD, especially mature fruit with full ripening capacity that would simulate commercial life.…”