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Elongation of barley roots in high‐<scp>pH</scp> nutrient solution is supported by both cell proliferation and differentiation in the root apex
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- Kyoko Higuchi
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Kota Ono
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Satoru Araki
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Shogo Nakamura
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Tetsuya Uesugi
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Taira Makishima
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Atsushi Ikari
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Takahiro Hanaoka
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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- Masayuki Sue
- Department of Applied Biology and Chemistry Tokyo University of Agriculture Tokyo Japan
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Description
<jats:title>Abstract</jats:title><jats:p>Many crops grow well on neutral or weakly acidic soils. The ability of roots to elongate under high‐external pH would be advantageous for the survival of plants on alkaline soil. We found that root elongation was promoted in some plant species in alkaline‐nutrient solution. Barley, but not tomato, root growth was maintained in pH 8 nutrient solution. Fe and Mn were absorbed well from the pH 8 nutrient solution by both barley and tomato plants, suggesting that the different growth responses of these two species may not be caused by insolubilization of transition metals. The ability of intact barley and tomato plants to acidify external solution was comparable; in both species, this ability decreased in plants exposed to pH 8 nutrient solution for 1 w. Conversely, cell proliferation and elongation in barley root apices were facilitated at pH 8 as shown by microscopy and cell‐cycle‐related gene‐expression data; this was not observed in tomato. We propose that barley adapts to alkaline stress by increasing root development.</jats:p>
Journal
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- Plant, Cell & Environment
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Plant, Cell & Environment 40 (8), 1609-1617, 2017-05-26
Wiley
