Comparison of Iron Availability in Leaves of Barley and Rice(Plant Nutrition)
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概要
- 論文の詳細を見る
Iron (Fe) is an essential trace element in all eukaryotes. In higher plants, Fe deficiency causes interveinal chlorosis in young leaves. However, in barley and rice, both of which are "Strategy II" plants, the degree and the pattern of Fe-deficiency symptoms differ. In the present study, barley and rice plants were grown in the same container, i.e., by "coculturing," to compensate for the amount of mugineic acids in rice in the nutrient solution. We examined the differential availability of Fe for distribution and retranslocation in shoots between barley and rice without considering the difference in the iron acquisition ability, which is affected by the differential mugineic acid secretion between barley and rice. Although the Fe concentration of young barley leaves had decreased under the coculture conditions, the SPAD value was similar to that in monocultured barley. In contrast, although there was an increase in the Fe concentration of the young leaves of cocultured rice, the SPAD value decreased, as in the case of monocultured rice. Rice accumulated Fe in old leaves, whereas in barley Fe was efficiently distributed to young leaves. Therefore, the SPAD value of the second leaf in rice remained constantly high. The Fe concentration of the second leaf in barley decreased under Fe-deficient coculture conditions, the SPAD value decreased and the senescence of the second leaf become accelerated. ^<59>Fe pulse-labeling experiments suggested that in barley Fe was more efficiently retranslocated from old leaves to young leaves than that in rice. As a result, the level of Fe present in the fraction with a molecular weight lower than the 10,000/water-soluble Fe ratio was higher in the old leaves of barley than in the old leaves of rice under Fe-deficient conditions. Based on the results obtained, we suggest that the distribution and retranslocation characteristics of internal Fe in barley may be well adapted to Fe deficiency.
- 社団法人日本土壌肥料学会の論文
著者
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HIGUCHI Kyoko
Laboratory of Plant Production Chemistry, Department of Applied Biology and Chemistry, Tokyo Univers
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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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Tadano Toshiaki
Laboratory of Plant Nutrition, Faculty of Agriculture, Hokkaido University
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Higuchi Kyoko
Tokyo Univ. Agriculture Tokyo Jpn
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Maruyama Teppei
Laboratory of Plant Production Chemistry, Department of Applied Biology and Chemistry, Tokyo Univers
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Yoshida Masaaki
Laboratory of Plant Production Chemistry, Department of Applied Biology and Chemistry, Tokyo Univers
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Maruyama Teppei
Department Of Applied Biology And Chemistry Faculty Of Applied Bio-science Tokyo University Of Agric
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Yoshiba Masaaki
Jst‐crest Tokyo Jpn
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Tadano Toshiaki
Laboratory Of Plant Nutrition Faculty Of Agriculture Hokkaido University
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Maeda Yoshiyuki
Tokyo Univ. Agriculture Tokyo Jpn
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Higuchi Kyoko
Laboratory Of Plant Production Chemistry Department Of Applied Biology And Chemistry Faculty Of Appl
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Tadano Toshiaki
Laboratory Of Plant Production Chemistry Department Of Applied Biology And Chemistry Faculty Of Appl
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Higuchi Kyoko
Laboratory Of Plant Production Chemistry Department Of Applied Biology And Chemistry Faculty Of Applied Bio-science Tokyo University Of Agriculture
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