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Silicon nutrition increases grain yield, which, in turn, exerts a feed-forward stimulation of photosynthetic rates via enhanced mesophyll conductance and alters primary metabolism in rice

Detmann, Kelly C. ; Araújo, Wagner L. ; Martins, Samuel C. V. ; Sanglard, Lílian M. V. P. ; Reis, Josimar V. ; Detmann, Edenio ; Rodrigues, Fabrício Á. ; Nunes‐Nesi, Adriano ; Fernie, Alisdair R. ; DaMatta, Fábio M.

The New phytologist, 2012-11, Vol.196 (3), p.752-762 [Peer Reviewed Journal]

England: New Phytologist Trust

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Title:
Silicon nutrition increases grain yield, which, in turn, exerts a feed-forward stimulation of photosynthetic rates via enhanced mesophyll conductance and alters primary metabolism in rice
Author: Detmann, Kelly C. ; Araújo, Wagner L. ; Martins, Samuel C. V. ; Sanglard, Lílian M. V. P. ; Reis, Josimar V. ; Detmann, Edenio ; Rodrigues, Fabrício Á. ; Nunes‐Nesi, Adriano ; Fernie, Alisdair R. ; DaMatta, Fábio M.
Subjects: Agricultural production ; Amino acid metabolism ; Amino acids ; Carbon - metabolism ; Carbon dioxide ; Carbon Dioxide - metabolism ; Carbon isotopes ; Chloroplasts - metabolism ; Chloroplasts - physiology ; Conductance ; Crop yield ; Crops, Agricultural - metabolism ; Crops, Agricultural - physiology ; Electron Transport ; Feeds ; Gas exchange ; Grain ; Grains ; Isotope Labeling ; Isotope labelling ; Labelling ; Leaves ; Mesophyll ; Mesophyll Cells - metabolism ; mesophyll conductance ; metabolic profiling ; Metabolism ; Metabolome ; Nitrogen - metabolism ; Nutrition ; Oryza - metabolism ; Oryza - physiology ; Photosynthesis ; Plant Leaves - metabolism ; Plant Leaves - physiology ; Plant Stomata - physiology ; Plant Transpiration ; Plants ; Plants (botany) ; Resistance ; Rice ; rice (Oryza sativa) ; Seeds - metabolism ; Seeds - physiology ; Silicon ; silicon (Si) ; Silicon - metabolism ; source–sink manipulation ; Stimulation
Is Part Of: The New phytologist, 2012-11, Vol.196 (3), p.752-762
Notes: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Description: Silicon (Si) is not considered to be an essential element for higher plants and is believed to have no effect on primary metabolism in unstressed plants. In rice (Oryza sativa), Si nutrition improves grain production; however, no attempt has been made to elucidate the physiological mechanisms underlying such responses. Here, we assessed crop yield and combined advanced gas exchange analysis with carbon isotope labelling and metabolic profiling to measure the effects of Si nutrition on rice photosynthesis, together with the associated metabolic changes, by comparing wild-type rice with the low-Si rice mutant lsi1 under unstressed conditions. Si improved the harvest index, paralleling an increase in nitrogen use efficiency. Higher crop yields associated with Si nutrition exerted a feed-forward effect on photosynthesis which was fundamentally associated with increased mesophyll conductance. By contrast, Si nutrition did not affect photosynthetic gas exchange during the vegetative growth phase or in de-grained plants. In addition, Si nutrition altered primary metabolism by stimulating amino acid remobilization. Our results indicate a stimulation of the source capacity, coupled with increased sink demand, in Si-treated plants; therefore, we identify Si nutrition as an important target in attempts to improve the agronomic yield of rice.
Publisher: England: New Phytologist Trust
Language: English

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Silicon nutrition increases grain yield, which, in turn, exerts a feed-forward stimulation of photosynthetic rates via enhanced mesophyll conductance and alters primary metabolism in rice

Detmann, Kelly C. ; Araújo, Wagner L. ; Martins, Samuel C. V. ; Sanglard, Lílian M. V. P. ; Reis, Josimar V. ; Detmann, Edenio ; Rodrigues, Fabrício Á. ; Nunes‐Nesi, Adriano ; Fernie, Alisdair R. ; DaMatta, Fábio M.

England: New Phytologist Trust

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