Variations in salt tolerance of reed canarygrass (Phalaris arundinacea L.) plants grown at sites with different degrees of cattle urine contamination(Plant Nutrition)
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概要
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Variations in the salt tolerance of reed canarygrass (RCG) plants grown at sites with different degrees of cattle urine contamination were investigated. Cattle urine overflowed the urine reservoir and invaded the grassland. Soils and RCG plants were collected from sampling spots selected along the urine flowing line from 0 (contaminated site beside the urine reservoir) to 100 m. With increasing distance from the reservoir, the contents of K, Na, Ca, Mg and NO_3-N in the soil and Na, K and NO_3-N in the collected RCG plants decreased. The RCG plants were grown in a standard solution to obtain a large number of clones and seeds for the next generation. After the RCG clones and their next generation were subjected to water culture to the fifth leaf stage, NaCl was applied to the solution to investigate their salt tolerance. The salt tolerance, which was the highest in the RCG clones and their next generation for the plants collected from the site beside the reservoir, decreased with increasing distance from the reservoir. Under saline water culture conditions, Na and free-proline contents in shoots, K content in shoots and roots, water potential of leaves and plasmalemma ATPase activity of roots increased in the RCG clones and their next generation along with a higher salt tolerance. In conclusion, responses to saline conditions were similar between the RCG clones and the next generation that were cross-pollinated. It was considered that, even within a confined range of the grassland, salt-tolerant RCG plants that had adapted to the urine-contaminated soils were selected, and that high salt tolerance was genetically controlled. It appears likely that the maintenance of the water potential and K-absorbing function under NaCl stress contributed to the high salt tolerance.
- 社団法人日本土壌肥料学会の論文
著者
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Tadano Toshiaki
Department of Bioscience and Chemistry, Faculty of Agriculture, Hokkaido University
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MAEDA Yoshiyuki
Department of Instrumentation Engineering,Faculty of Science and Technology,Keio University
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Tadano Toshiaki
Department Of Applied Biology And Chemistry Faculty Of Applied Bio-science Tokyo University Of Agric
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Maeda Yoshiyuki
Department Of Applied Biology And Chemistry Faculty Of Applied Bio-science Tokyo University Of Agric
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Tadano Toshiaki
Tokyo Univ. Agriculture Tokyo Jpn
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Tadano Toshiaki
Hokkaido University
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Hirano Shigeru
Department Of Applied Biology And Chemistry Tokyo University Of Agriculture
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YOSHIBA Masaaki
Department of Applied Biology and Chemistry, Faculty of Applied Bio-Science, Tokyo University of Agr
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Yoshiba Masaaki
Jst‐crest Tokyo Jpn
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Maeda Yoshiyuki
Tokyo Univ. Agriculture Tokyo Jpn
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Tadano Toshiaki
Laboratory Of Plant Production Chemistry Department Of Applied Biology And Chemistry Faculty Of Appl
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