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Complex interactions in legume/cereal intercropping system: role of root exudates in root-to-root communication

Yinshan Jiao, Entao Wang, Wenfeng Chen, Donald L. Smith
doi: https://doi.org/10.1101/097584
Yinshan Jiao
aState Key Laboratory of Agrobiotechnology, Beijing 100193, China
bCollege of Biological Sciences and Rhizobia Research Center, China Agricultural University, Beijing 100193, China
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  • For correspondence: jiaoyinshan@126.com donald.smith@mcgill.ca.
Entao Wang
cDepartamento de Microbiología, Escuela Nacional de Ciencias Biológicas, Instituto Politécnico Nacional, 11340 México D.F., Mexico
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Wenfeng Chen
aState Key Laboratory of Agrobiotechnology, Beijing 100193, China
bCollege of Biological Sciences and Rhizobia Research Center, China Agricultural University, Beijing 100193, China
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Donald L. Smith
dDepartment of Plant Science, Macdonald Campus of McGill University, Ste-Anne-de-Bellevue, Quebec, Canada. H9X 3V9
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  • For correspondence: jiaoyinshan@126.com donald.smith@mcgill.ca.
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Abstract

Dear Editor,

Legume/cereal intercropping systems have been regarded as the practical application of basic ecological principles such as diversity, competition and facilitation. In a recent PNAS paper, Li et al. (1) describe the novel finding that maize exudates promote faba bean nodulation and nitrogen fixation by upregulating genes involved in (iso)flavonoids synthesis (chalcone–flavanone isomerase) within faba bean, resulting in production of more genistein, a legume-to-rhizobia signal during establishment of the faba bean N2–fixing symbiosis. Although we salute the authors’ methodological efforts, there is another mechanism that could be responsible for the effect of corn root exudates on faba been nitrogen fixation observed in this article (1). The authors may misunderstand their data and the signalling role of maize exudates, thus got a defective model for the root interactions between faba bean and maize.

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The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC 4.0 International license.
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Posted January 02, 2017.
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Complex interactions in legume/cereal intercropping system: role of root exudates in root-to-root communication
Yinshan Jiao, Entao Wang, Wenfeng Chen, Donald L. Smith
bioRxiv 097584; doi: https://doi.org/10.1101/097584
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Complex interactions in legume/cereal intercropping system: role of root exudates in root-to-root communication
Yinshan Jiao, Entao Wang, Wenfeng Chen, Donald L. Smith
bioRxiv 097584; doi: https://doi.org/10.1101/097584

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