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| Home > Publications database > Vertical gradient in soil temperature stimulates development and increases biomass accumulation in barley |
| Journal Article | PreJuSER-9446 |
; ; ; ; ; ;
2012
Wiley-Blackwell
Oxford [u.a.]
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Please use a persistent id in citations: doi:10.1111/j.1365-3040.2011.02460.x
Abstract: We have detailed knowledge from controlled environment studies on the influence of root temperature on plant performance, growth and morphology. However, in all studies root temperature was kept spatially uniform, which motivated us to test whether a vertical gradient in soil temperature affected development and biomass production. Roots of barley seedlings were exposed to three uniform temperature treatments (10, 15 or 20°C) or to a vertical gradient (20-10°C from top to bottom). Substantial differences in plant performance, biomass production and root architecture occurred in the 30-day-old plants. Shoot and root biomass of plants exposed to vertical temperature gradient increased by 144 respectively, 297%, compared with plants grown at uniform root temperature of 20°C. Additionally the root system was concentrated in the upper 10cm of the soil substrate (98% of total root biomass) in contrast to plants grown at uniform soil temperature of 20°C (86% of total root biomass). N and C concentrations in plant roots grown in the gradient were significantly lower than under uniform growth conditions. These results are important for the transferability of 'normal' greenhouse experiments where generally soil temperature is not controlled or monitored and open a new path to better understand and experimentally assess root-shoot interactions.
Keyword(s): Biomass (MeSH) ; Carbon: analysis (MeSH) ; Carbon: metabolism (MeSH) ; Hordeum: growth & development (MeSH) ; Hordeum: physiology (MeSH) ; Nitrogen: analysis (MeSH) ; Nitrogen: metabolism (MeSH) ; Plant Leaves: growth & development (MeSH) ; Plant Roots: growth & development (MeSH) ; Plant Roots: physiology (MeSH) ; Plant Shoots: growth & development (MeSH) ; Plant Shoots: physiology (MeSH) ; Seedling: growth & development (MeSH) ; Soil: chemistry (MeSH) ; Temperature (MeSH) ; Time Factors (MeSH) ; Water (MeSH) ; Soil ; Carbon ; Nitrogen ; Water ; J ; Hordeum vulgare (auto) ; C and N distribution (auto) ; root diameter (auto) ; root growth (auto) ; root length (auto) ; shoot development (auto) ; soil temperature gradient (auto) ; uniform soil temperature (auto)
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