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Related Experiment Video

Updated: Sep 22, 2025

Live Confocal Imaging of Developing Arabidopsis Flowers

Live Confocal Imaging of Developing Arabidopsis Flowers

Published on: April 1, 2017

Architectural effects regulate resource allocation within the inflorescences with nonlinear blooming patterns.

Hao Wang¹, Zhi-Qiang Zhang¹, Bo Zhang²

¹Yunnan Key Laboratory of Plant Reproductive Adaptation and Evolutionary Ecology, and State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Institute of Biodiversity, School of Ecology and Environmental Science, Yunnan University, Kunming, 650504, Yunnan, China.

American Journal of Botany

|May 19, 2022

Summary

Resource competition and plant architecture significantly impact flower reproductive success in Salvia przewalskii. Inflorescence structure, not flowering order, drives resource allocation and sex allocation in this species.

Keywords:

Lamiaceae floral position floral traits flowering sequence pollen:ovule ratio reproductive success

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Published on: April 12, 2018

Area of Science:

Plant reproductive biology
Ecology
Evolutionary botany

Background:

Intra-inflorescence resource allocation is key to plant reproductive success.
Decoupled flowering patterns challenge traditional models of resource distribution.
Understanding sex allocation in species with fixed ovule numbers is crucial.

Purpose of the Study:

Investigate intra-inflorescence variation in reproductive traits of Salvia przewalskii.
Determine the effects of resource competition and inflorescence architecture on reproductive success.
Analyze sex allocation patterns in a species with decoupled flowering.

Main Methods:

Manipulated floral bud removal by position and flowering sequence.
Performed pollination treatments (open and supplemented).
Quantified pollen production, dry mass, seed production, fruit set, and bud development.

Main Results:

Pollen production and dry mass decreased acropetally (bottom to top).
Basal flowers showed male-biased sex allocation.
Seed production, fruit set, and bud development declined basipetally (proximal to distal).
Thinning by flowering sequence did not affect reproductive success.

Conclusions:

Inflorescence architecture significantly influences resource allocation in decoupled flowering systems.
Fixed ovule production can modify the impact of architectural effects on sex allocation.
Positional effects within the inflorescence are more critical than flowering sequence for reproductive success.