Manipulation of photosensory and circadian signaling restricts phenotypic plasticity in response to changing environmental conditions in Arabidopsis  

作　　者：Martin William Battle Scott Fraser Ewing Cathryn Dickson Joseph Obaje Kristen N.Edgeworth Rebecca Bindbeutel Rea LAntoniou-Kourounioti Dmitri A.Nusinow Matthew Alan Jones 

机构地区：[1]Plant Science Group,School of Molecular Biosciences,University of Glasgow,Glasgow G128QQ,UK [2]Danforth Plant Science Center,St.Louis,MO 63132,USA [3]Department of Biological and Biomedical Sciences,Washington University in St.Louis,St.Louis,MO 63130,USA [4]Present address:School of Biological and Environmental Sciences,Liverpool John Moores University,Liverpool L22QP,UK

出　　处：《Molecular Plant》2024年第9期1458-1471,共14页分子植物（英文版）

基　　金：supported by the UKRI(BB/S005404/1 and BB/Z514469/1);the Gatsby Charitable Foundation,the Perry Foundation(to S.F.E.);the Douglas Bomford Trust(to S.F.E.);a William H.Danforth Plant Sciences Fellowship(to K.N.E.).

摘　　要：Plants exploit phenotypic plasticity to adapt their growth and development to prevailing environmental conditions.Interpretation of light and temperature signals is aided by the circadian system,which provides a temporal context.Phenotypic plasticity provides a selective and competitive advantage in nature but is obstructive during large-scale,intensive agricultural practices since economically important traits(including vegetative growth and flowering time)can vary widely depending on local environmental condi-tions.This prevents accurate prediction of harvesting times and produces a variable crop.In this study,we sought to restrict phenotypic plasticity and circadian regulation by manipulating signaling systems that govern plants'responses to environmental signals.Mathematical modeling of plant growth and develop-ment predicted reduced plant responses to changing environments when circadian and light signaling pathways were manipulated.We tested this prediction by utilizing a constitutively active allele of the plant photoreceptor phytochrome B,along with disruption of the circadian systemvia mutation of EARLYFLOW-ERING3.We found that these manipulations produced plants that are less responsive to light and temper-ature cues and thus fail to anticipate dawn.These engineered plants have uniform vegetative growth and flowering time,demonstrating how phenotypic plasticity can be limited while maintaining plant productiv-ity.This has significant implications for future agriculture in both open fields and controlled environments.

关 键 词：CIRCADIAN developmental plasticity phenotypic plasticity external coincidence light temperature 

分 类 号：Q945[生物学—植物学]