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Biomass-based rapeseed (Brassica napus L.) leaf geometric parameter model Hongxin Cao

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Proceedings of the 7th International Conference on Functional-Structural Plant Models, Saariselkä, Finland, 9 - 14 June 2013. Eds. Risto Sievänen, Eero Nikinmaa, Christophe Godin, Anna Lintunen & Pekka Nygren.

http://www.metla.fi/fspm2013/proceedings. ISBN 978-951-651-408-9.

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Biomass-based rapeseed (Brassica napus L.) leaf geometric parameter model

Hongxin Cao 1,,Wenyu Zhang 1, Weixing Zhang 1, Yan Liu 1, Yongxia Liu 1, Jim Hanan2, Yuli Chen1, Yanbin Yue,3, Zhiyou Zhang4, Daokuo Ge1

1 Institute of Agricultural Economics and Information ; Engineering Research Center for Digital Agriculture, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, Jiangsu Province, P.R. China, 2The University

of Queensland, Centre for Biological Information Technology, Brisbane, Queensland 4068, Australia,

3Institute of Agricultural Sci-tech Information, Guizhou Academy of Agricultural Sciences, Guiyang 550000,Guizhou, P.R. China, 4Institute of Agricultural Sci-tech Information, Hunan Academy of Agricultural

Sciences, Changsha 410000, Hunan, P.R. China

Highlights: A biomass-based model of leaf geometric parameters of rapeseed was developed, and the effects of cultivars and environmental conditions on rapeseed leaf morphogenesis were considered through the connection to rapeseed growth model via biomass.

Keywords: biomass, leaf geometric parameter, model, rapeseed (Brassica napus L.).

To quantify the relationships between rapeseed leaf geometric parameters and the corresponding leaf biomass, this paper presents a biomass-based model of leaf geometric parameters of rapeseed (Brassica napus L.) in the seedling stage, including Biomass-base leaf blade length model LLj(i) = CPLBj(i) · DWSP(i)· RLWj(i), blade length-based leaf blade width model , leaf sheath length model , leaf blade bowstring length model , and leaf blade angle models TAj(i) = CPLBj(i) · DWSP(i)·RTWj(i), BAj(i)= CPLBj(i) · DWSP(i)· RBWj(i) , designed to explain effects of genotypes and environmental conditions on rapeseed leaf morphogenesis at the individual leaf level. Various model variables, including biomass of blade, and blade length, were parameterized for rapeseed based on data derived from an outdoor experiment with rapeseed cv. Ningyou18, Ningyou16, and Ningza19. The leaf dimensions of rapeseed are modelled taking corresponding leaf biomass as an independent variable. Various variables in rapeseed showed marked consistency in observation and simulation, suggesting possibilities for a general rapeseed leaf geometric parameter model in the seedling stage. Our descriptive model is suitable for our objective. However, they can set the stage for connection to physiological model via biomass and development of Functional Structural Rapeseed Models (FSRM), and start with the localized production and partitioning of assimilates as affected by abiotic growth factors. The finding of biomass-based rapeseed leaf geometric parameter models also can be used in morphological models of internode, ramification, anthotaxy, and root of the other stages in rapeseed life.

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