Live Imaging of <em>Arabidopsis</em> Pollen Tube Reception and Double Fertilization Using the Semi-<em>In Vitro Cum Septum</em> Method

Nicholas J. Desnoyer; Ueli Grossniklaus

doi:10.3791/65156

Live Imaging of Arabidopsis Pollen Tube Reception and Double Fertilization Using the Sem...

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Live Imaging of Arabidopsis Pollen Tube Reception and Double Fertilization Using the Semi-In Vitro Cum Septum Method

Live Imaging of Arabidopsis Pollen Tube Reception and Double Fertilization Using the Semi-In Vitro Cum Septum Method

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06:45 min

February 24, 2023

DOI: 10.3791/65156-v

Nicholas J. Desnoyer¹, Ueli Grossniklaus¹

¹Department of Plant and Microbial Biology and Zurich-Basel Plant Science Center,University of Zurich

Overview

This study presents an enhancement of the semi-in vitro (SIV) method for analyzing pollen tube guidance and ovule receptivity in Arabidopsis thaliana. The improved SIV cum septum approach allows for better observation of gametophyte interactions, facilitating higher sample sizes and more effective fertilization monitoring.

Key Study Components

Research Area

Reproductive biology
Fertilization processes in plants
Pollen tube dynamics

Background

Challenges in observing ovule receptivity
Importance of gametophyte interactions in fertilization
Previous limitations of in vitro methods

Methods Used

Enhancement of semi-in vitro technique
Arabidopsis thaliana as the model organism
Utilization of fluorescent imaging and gametophyte marker lines

Main Results

Improved receptivity of ovules with the new method
Successful observation of pollen tube reception dynamics
Increased efficiency rates for fertilization outcomes

Conclusions

The technique enhances the understanding of gametophyte interactions during fertilization.
This method holds potential for advancing research in plant reproductive biology.

Frequently Asked Questions

What is the significance of the improved SIV method?

The improved SIV method allows for better observation of pollen tube guidance and higher ovule receptivity, facilitating more effective fertilization studies.

Which organism is primarily studied in this research?

The primary model organism used in this study is Arabidopsis thaliana.

What are the main advantages of this enhanced method?

The enhanced method increases sample size and receptivity of ovules, allowing for high-throughput observation of fertilization.

How does this method contribute to plant reproductive biology?

It provides insights into gametophyte interactions and the dynamics of pollen tube reception, crucial for understanding plant fertilization.

What imaging techniques are utilized?

Fluorescent imaging combined with gametophyte marker lines are used for monitoring fertilization processes.

What is the efficiency rate achieved with this method?

The method demonstrates a significant efficiency range of approximately 70 to 100% for successful pollen tube reception.

Can this method be coupled with other techniques?

Yes, it can be paired with two-photon excitation imaging for closer observation of physiological changes.

Here, we describe an improvement of the semi-in vitro (SIV) method for observing pollen tube guidance and reception in Arabidopsis thaliana, which increases the receptivity of ovules. The high-throughput SIV cum septum method may be coupled with gametophyte marker lines and genetically encoded biosensors to monitor the dynamic process of fertilization.

This method will facilitate research on sexual reproduction in Arabidopsis by allowing for the observation of gametophyte interactions with high efficiency and with high sample size number per imaging session. The main advantage of this technique is by keeping the ovules on the septum, the amount and receptivity of the ovules is greatly increased over previous methods. The dissection technique can initially be difficult and requires a steady hand.

Therefore, it's recommended to practice a few times on emasculated pistils before getting started with the experiment. Begin by preparing the pollen germination medium as explained in the text. After the agar is completely melted, pipette 130 microliters of the medium into the 14 millimeter well of a 35 millimeter glass bottom dish.

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