Tail-like anther crest aids pollination by manipulating pollinator's behaviour in a wild ginger

Area of Science:

• * Botany
• * Evolutionary Biology
• * Plant Reproduction

Background:

• * Innovative floral organs are common in angiosperms, but their evolutionary origins and functions remain largely unexplored.
• * Floral structures are hypothesized to be crucial for pollination, yet the specific roles of novel organs are puzzling.
• * The anther crest, a tail-like appendage of the anther, is a widespread but functionally enigmatic structure in Zingiberaceae (ginger family).

Purpose of the Study:

• * To investigate the function of the anther crest in Zingiber densissimum (wild ginger).
• * To determine how this innovative floral structure influences pollinator interactions and plant reproductive success.
• * To understand the adaptive significance of resource allocation to male organs for enhancing both male and female functions.

Main Methods:

• * Focused on Zingiber densissimum, a species featuring a prominent anther crest.
• * Observed and analyzed pollinator behavior and interactions with the anther crest.
• * Assessed the impact of the anther crest on pollen removal (male function) and pollen receipt (female function).

Main Results:

• * The anther crest significantly influences pollinator positioning during flower visits.
• * This manipulation by the anther crest optimizes pollen removal and enhances pollen receipt.
• * Both male and female reproductive success of the plant are promoted by the anther crest.

Conclusions:

• * The anther crest is an adaptive floral innovation that enhances plant reproductive fitness.
• * This structure demonstrates how resource allocation to a male organ can simultaneously boost both male and female functions.
• * The study expands understanding of the sexual roles and adaptive evolution of specialized floral appendages.