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Decoding the gene coexpression network underlying the ability of Gevuina avellana to live in diverse light conditions

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Title Decoding the gene coexpression network underlying the ability of Gevuina avellana to live in diverse light conditions
 
Creator Ostria-Gallardo, Enrique
Ranjan, Aashish
Ichihashi, Yasunori
Corcuera, Luis J.
Sinha, Neelima R.
 
Subject gene coexpression network
Gevuina avellana
light acclimation
photosynthesis
temperate rainforest
 
Description Accepted date: 21 May 2018
Gevuina avellana (Proteaceae) is a typical tree from the South American temperate rainforest.
Although this species mostly regenerates in shaded understories, it exhibits an exceptional
ecological breadth, being able to live under a wide range of light conditions. Here we studied
the genetic basis that underlies physiological acclimation of the photosynthetic responses of
G. avellana under contrasting light conditions.
We analyzed carbon assimilation and light energy used for photochemical processes in
plants acclimated to contrasting light conditions. Also, we used a transcriptional profile of leaf
primordia from G. avellana saplings growing under different light environments in their natural
habitat, to identify the gene coexpression network underpinning photosynthetic performance
and light-related processes.
The photosynthetic parameters revealed optimal performance regardless of light conditions.
Strikingly, the mechanism involved in dissipation of excess light energy showed no significant
differences between high- and low-light-acclimated plants. The gene coexpression network
defined a community structure consistent with the photochemical responses, including genes
involved mainly in assembly and functioning of photosystems, photoprotection, and retrograde
signaling.
This ecophysiological genomics approach improves our understanding of the intraspecific
variability that allows G. avellana to have optimal photochemical and photoprotective mechanisms
in the diverse light habitats it encounters in nature.
E.O-G. thanks the Chilean National Commission for Scientific
and Technological Research for doctoral fellowship, and the
internship grant supported by Universidad de Concepci on, project
Mecesup UCO0708. We also thank Dr Carolina Sanhueza
and Karina Rifo for their support in gas exchange and fluorescence
of Chla measurements, and Katalapi Park for excellent
research field facilities. Part of the work was supported by NSF
PGRP grant IOS‐1238243 (to Julia Bailey-Serres, N.R.S., Siobhan
Brady and Roger Deal). Y.I. thanks the Japan Science and
Technology Agency (PRESTO, JPMJPR15Q2).
 
Date 2018-07-10T09:49:48Z
2018-07-10T09:49:48Z
2018
 
Type Article
 
Identifier New Phytologist, 220(1): 278-287
1469-8137
http://223.31.159.10:8080/jspui/handle/123456789/870
https://nph.onlinelibrary.wiley.com/doi/full/10.1111/nph.15278
https://doi.org/10.1111/nph.15278
 
Language en_US
 
Format application/pdf
 
Publisher John Wiley & Sons