Patterns of ROS Accumulation in the Stigmas of Angiosperms and Visions into Their Multi-Functionality in Plant Reproduction

• DOI: 10.3389/fpls.2016.01112
• Publication Date: 2016-08-04T23:15:37Z
• Authors: Adoración Zafra; Juan D. Rejón; Simon J. Hiscock; Juan de Dios Alché
• Keywords: Plant reproduction

Accumulation of reactive oxygen species (ROS) in the stigma several plant has been investigated. Four developmental stages (unopened flower buds, recently opened flowers, dehiscent anthers and flowers after fertilization) were analyzed by confocal laser scanning microscopy using ROS-specific probe DCFH2-DA. In all plants scrutinized, presence ROS stigmas was detected at higher levels during those phases considered "receptive" to pollen interaction. addition, these molecules also present early flower) or later (post-fertilization) stages, following differential patterns depending on different species. The biological significance may differ between including defense functions, signaling senescence. Pollen-stigma is likely involved mechanisms self-incompatibility plants. study register a general decrease upon pollination, when NO supposedly produced an active manner grains. Finally, distribution primitive Angiosperms genus Magnolia determined. production such chemical orders magnitude than remaining evoking massive displacement towards function. This might indicate that functions ROS/NO evolved later, as fine tune specialized interactions like self-incompatibility.