Peroxynitrite mediates programmed cell death both in papillar cells and in self-incompatible pollen in the olive (Olea europaea L.).

ABSTRACT: Programmed cell death (PCD) has been found to be induced after pollination both in papillar cells and in self-incompatible pollen in the olive (Olea europaea L.). Reactive oxygen species (ROS) and nitric oxide (NO) are known to be produced in the pistil and pollen during pollination but their contribution to PCD has so far remained elusive. The possible role of ROS and NO was investigated in olive pollen-pistil interaction during free and controlled pollination and it was found that bidirectional interaction appears to exist between the pollen and the stigma, which seems to regulate ROS and NO production. Biochemical evidence strongly suggesting that both O(2)(-) and NO are essential for triggering PCD in self-incompatibility processes was also obtained. It was observed for the first time

SUBMITTER: Serrano I 

PROVIDER: S-EPMC3276107 | biostudies-literature | 2012 Feb

REPOSITORIES: biostudies-literature