How can 3D virtual plant help to better understand plant physiology and genotype-environment interactions?

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~----~---How can 3D virtual plant help to better understand plant physiology and

genotype-environment interactions?

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K. Chenu,,2,3, H. Rey4, A. Christophe1, B. Andrieu

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C. Fournier

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C. Giauffret

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J. Dauzatl and

J. Lecoeur

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1UMR LEPSE, INRA-ENSAM, 2 place Viala, 34060 Montpellier, France-2UMR EGC, INRA -lNAPG, 78850 Thiverval- Grignon, France

3UMR SADV, INRA-USTL, 80203 Péronne, France • UMR AMAP, CIRAD/AMIS, 34398 Montpellier, France

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'II response to lighl, to better understand the genotype-environment

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~ dissection of architectural;

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interactions, to quanüfy the impact ofdifferent architectural traits 1

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charaeteristics (piani dimension.

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involved in integraled responses and finally to forecast plant

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rate of growth, Ieaf inclination... )

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development in response to ils environment.

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on integrative traits such as the.

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' a m o u n t of radiation intercepted by

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environment at the high throughout scale by

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dimension (lamina, shealh and;

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The arnountofradiation absort>ed by the plant

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experiment. The aim is to evaluate!

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Through lhe accurate characterisation of the environment, 3D ~I _ro<litllOn1"'"pif'd·'> A I > _,00"lion(mmoIpoIt·'d·')

'II virtual plants aliowed us 10 find out some robust relationships I! '

1belw'een plant development and plant environment. InArabidopsis 1 The model developed in Arabidopsis allowed us to characlerise Ihe

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l and sunflower early leaf development is retated 10 the amount

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behaviour of a genotype by a set of parameters independenl of Ihe

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radiation absorbed by the plant and could then be driven by trophic

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environment. The parameters of the response CUIV6S are genotype SpeciflC and stable for a wide range of light environmental conditions. They can be used in further studies to better understand genes and pathways involved in these responses.

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: Piani Ieaf area was simulaled in response to temperalure and !ight

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The mulalionofthe SERRATE gene was found to play a key role in the 1

inlensity in sunflower andArabidopsis, during the vegetative phase. 1

The next step is to simulale different genotypes in differenl climalic

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1 leat initiation. Contrary la the wild type, serrate mutanl had a leaf

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initiation rate unaffected by light (Chenu el al. 2004). 1

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~~SiIYobserved and Ihe comparisonofdifferenl genotypes. Genotype-environmenl interaclions can thenbe =~::: :=l~~~32;112)-1134

dlssecled to focus on gene effects. CIMnuKel01 f2C07) $al1O.ndCo~n PlarKSyOl8nu

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of the piani behaviour in different environments and for·

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,\:l,fferenl specles. Wlth Ihelr adaplalion to dlfferenl genotypes, such lools could help 10 define ideotypes_{;depending on the climatic scenario.}

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How can 3D virtual plant help to better understand plant physiology and genotype-environment interactions?