Cloning of the Plasma Membrane H^+-ATPase Gene with Suppressed Expression under Pi-Deficient Conditions in Sesbania rostrata (Plant Nutrition)
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概要
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For a long time, it had been suggested that the activation of plasma membrane (PM) H^+- ATPase in roots was enhanced by Pi-deficiency. However, gene(s) encoding an isoform that is expressed in response to Pi-deficiency had not been isolated. In this study, attempts were made to isolate PM H^+-ATPase genes encoding such Pi-deficiency-responsible isoforms from Sesbania rostrata. We cloned three full-length (SrHA1, SrHA4, SrHAS) and three partial (SrHA2, SrHAS, SrHA6) cDNAs encoding PM H^+-ATPases from the roots of Pi-deficient 5. rostrata. The transcript levels of SrHA4 were high in roots. Unexpectedly, the transcript levels of SrHA4 decreased under Pi-deficient conditions where plants were provided with less than 30-50 JULM Pi, or where plants formed many nodules on the stems. Under such conditions, high-affinity Pi-transporters and phosphoenolpyruvate carboxylase (PEPC) genes were highly expressed. The decrease in the transcript levels of SrHA4 corresponded to the increase in the transcript levels of high-affinity Pi-transporters and PEPC genes under Pi-deficient conditions. This fact suggested that the expression of SrHA4 as well as that of high-affinity Pi-transporters and PEPC genes responded to the decrease in the Pi content in plants.
- 社団法人日本土壌肥料学会の論文
著者
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OYAIZU Hiroshi
Department of Global Agricultural Science, Graduate School of Agricultural and Life Sciences, The Un
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Oyaizu Hiroshi
Department Of Applied Biological Chemistry Division Of Agriculture And Life Sciences The University
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Aono Toshihiro
Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The U
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Aono Toshihiro
Department Of Applied Biological Chemistry Graduate School Of Agricultural And Life Sciences The Uni
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Oyaizu Hiroshi
Department Of Global Agricultural Sciences Graduate School Of Agricultural And Life Sciences The Uni
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Aono Toshihiro
Department Of Applied Biological Chemistry Graduate School Of Agricultural And Life Sciences The Uni
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