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Related Experiment Video

Updated: May 4, 2026

Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections

Semi-High Throughput Screening for Potential Drought-tolerance in Lettuce Lactuca sativa Germplasm Collections

Published on: April 17, 2015

Light effects upon dry lettuce seeds.

¹Department of Biological Sciences, Florida International University, 33199, Miami, FL, USA.

|January 11, 2014

Summary

This summary is machine-generated.

Red and far-red light influence lettuce seed germination by interacting with phytochrome. Phytochrome becomes functional upon wetting, regulating dormancy during seed maturation.

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Published on: December 31, 2012

Area of Science:

Plant biology
Photomorphogenesis
Seed physiology

Background:

Phytochrome mediates plant responses to light.
Seed germination is often regulated by light signals.

Purpose of the Study:

To investigate the role of phytochrome in dry and wetted Lactuca sativa seeds.
To determine the effect of red (R) and far-red (FR) light on seed germination.

Main Methods:

Irradiation of dry and wetted lettuce seeds with R and FR light.
Assessing germination percentages after light treatments.
Investigating phytochrome's functionality at different moisture levels.

Main Results:

Red light (R) increased germination of dry seeds, an effect reversed by far-red light (FR).
Wetting seeds activated phytochrome's response to light signals.
Phytochrome's PFR to PR transformation is more efficient at lower moisture content, potentially inducing dormancy.

Conclusions:

Phytochrome is present and can be functional in dry lettuce seeds.
Seed moisture content is critical for phytochrome-mediated germination responses.
Dormancy in seeds ripened in sunlight may be regulated by phytochrome during dehydration.