Thermoregulatory plasticity in flower spike pigmentation and reflectance in a northern population of Plantago lanceolata

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http://urn.fi/URN:NBN:fi:hulib-202106032468
Title: Thermoregulatory plasticity in flower spike pigmentation and reflectance in a northern population of Plantago lanceolata
Author: Burg, Skylar
Other contributor: Helsingin yliopisto, Bio- ja ympäristötieteellinen tiedekunta
University of Helsinki, Faculty of Biological and Environmental Sciences
Helsingfors universitet, Bio- och miljövetenskapliga fakulteten
Publisher: Helsingin yliopisto
Date: 2021
Language: eng
URI: http://urn.fi/URN:NBN:fi:hulib-202106032468
http://hdl.handle.net/10138/330541
Thesis level: master's thesis
Degree program: Kasvitieteen maisteriohjelma
Master 's Programme in Integrative Plant Sciences
Magisterprogrammet i botanik
Specialisation: ei opintosuuntaa
no specialization
ingen studieinriktning
Abstract: In this study, a greenhouse experiment was used to assess if temperature sensitivity, specifically, thermoregulatory plasticity, has a functional role in floral reflectance and pigmentation in a population of P. lanceolata grown in three different temperature treatments, reflecting past, present, and future summer temperatures. Spectrophotometry, surface temperature readings, and near-infrared (NIR) region image analysis were used to identify how the spectral absorbance properties and biochemical makeup of P. lanceolata flowers differed between treatments. Reflectance and phenolic absorbance were both found to be influenced by ambient temperature. However, surface temperature of flower spikes was not affected by growing temperature, reflectance, or phenolic absorbance. The results suggest that Plantago lanceolata may utilize thermoregulatory plasticity in reflectance and phenolic absorbance to adjust to rising temperatures. These findings have important implications in species reactions to climate change and denotes that increased selection on thermal function traits may occur under a future climate scenario of continued warming in temperate and boreal biomes.
Subject: phenotypic plasticity
thermoregulatory plasticity
Plantago lanceolata
floral reflectance
flower color
phenolics
spectrophotometry
image analysis
greenhouse experiment


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