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Journal Articles

Non-invasive imaging of sodium dynamics in common reed using positron-emitting tracer imaging system

Suzui, Nobuo; Maruyama, Teppei*; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*; Fujimaki, Shu

JAEA-Review 2015-022, JAEA Takasaki Annual Report 2014, P. 95, 2016/02

Journal Articles

Base to tip and long-distance transport of sodium in the root of common reed [${it Phragmites australis}$ (Cav.) Trin. ex Steud.] at steady state under constant high-salt conditions

Fujimaki, Shu; Maruyama, Teppei*; Suzui, Nobuo; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*

Plant & Cell Physiology, 56(5), p.943 - 950, 2015/05

 Times Cited Count:22 Percentile:65.02(Plant Sciences)

We analyzed the directions and rates of translocation of sodium ions (Na$$^{+}$$) within tissues of a salt-tolerant plant, common reed, and a salt-sensitive plant, rice, under constant high-salt conditions using radioactive $$^{22}$$Na tracer and a positron-emitting tracer imaging system (PETIS). First, the test plants were incubated in a nutrient solution containing 50 mM NaCl and a trace level of $$^{22}$$Na for 24 h (feeding step). Then the original solution was replaced with a fresh solution containing 50 mM NaCl but no $$^{22}$$Na, in which the test plants remained for over 48 h (chase step). Non-invasive visualization of $$^{22}$$Na movement in the test plants was conducted during feeding and chase steps with PETIS. Our results revealed that $$^{22}$$Na was absorbed in the roots of common reed, but not transported to the upper shoot beyond the shoot base. During the chase step, a basal-to-distal movement of $$^{22}$$Na was detected within the root tissue with a velocity of approximately 0.5 cm h$$^{-1}$$. On the other hand, $$^{22}$$Na that absorbed in the roots of rice was continuously translocated to the whole shoot. We concluded that the basal roots and the shoot base of common reed have constitutive functions of Na$$^{+}$$ exclusion only in the direction of root tips, even under constant high-salt conditions. This function may apparently contribute to the low Na$$^{+}$$ concentration in the upper shoot and high salt tolerance of common reed.

Oral presentation

Na$$^{+}$$ behavior in Reed under continuous saline stress

Maruyama, Teppei*; Suzui, Nobuo; Fujimaki, Shu; Kawachi, Naoki; Ishii, Satomi; Matsuhashi, Shimpei; Yoshiba, Masaaki*; Tadano, Toshiaki*; Higuchi, Kyoko*

no journal, , 

no abstracts in English

Oral presentation

Common reed has efficient Na$$^{+}$$ retrieving mechanisms at the shoot base to maintain low Na$$^{+}$$concentration in the shoot

Maruyama, Teppei*; Suzui, Nobuo; Kawachi, Naoki; Fujimaki, Shu; Yoshiba, Masaaki*; Miwa, Eitaro*; Higuchi, Kyoko*

no journal, , 

Oral presentation

Kinetic analysis of Na$$^{+}$$ retrieving mechanisims at the shoot base of common reed

Maruyama, Teppei*; Suzui, Nobuo; Kawachi, Naoki; Fujimaki, Shu; Tadano, Toshiaki*; Miwa, Eitaro*; Higuchi, Kyoko*

no journal, , 

no abstracts in English

Oral presentation

Common reed has efficient Na$$^{+}$$ retrieving mechanisms at the shoot base to maintain low Na$$^{+}$$ concentration in the shoot

Fujimaki, Shu; Maruyama, Teppei*; Suzui, Nobuo; Miwa, Eitaro*; Higuchi, Kyoko*

no journal, , 

no abstracts in English

Oral presentation

Sodium transport and ion transporter gene expressions in the root of common reed (${it Phragmites australis}$)

Higuchi, Kyoko*; Sato, Takeharu*; Suzui, Nobuo; Maruyama, Teppei*; Fujimaki, Shu; Miwa, Eitaro*

no journal, , 

Oral presentation

How can the common reed plants grow on salty water ?; Recirculation of sodium ions back to root tips proven with a positron imaging technique

Fujimaki, Shu; Maruyama, Teppei*; Suzui, Nobuo; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*

no journal, , 

no abstracts in English

Oral presentation

Analysis on sodium exclusion in the root of a salt-tolerant plant, common reed, with the positron imaging method

Fujimaki, Shu; Maruyama, Teppei*; Suzui, Nobuo; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*

no journal, , 

no abstracts in English

Oral presentation

Non-invasive imaging of sodium dynamics in common reed using positron-emitting tracer imaging system

Suzui, Nobuo; Maruyama, Teppei*; Kawachi, Naoki; Miwa, Eitaro*; Higuchi, Kyoko*; Fujimaki, Shu

no journal, , 

no abstracts in English

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