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Soybeans also absorb soil N from the roots, mainly in the form of nitrate in the upper fields. However, it has been known that nitrate strongly inhibits nodulation, nodule growth and nitrogen fixation activity of soybean nodules. Many hypotheses are proposed for the cause of nitrate inhibition of nodulation and nitrogen fixation, i.e., carbohydrate deprivation in nodules, decreased O_2 diffusion into nodules, which restricts the bacteroid respiration, feedback inhibition by a product of nitrate metabolism such as glutamine or asparagine. In this report, split-root system was employed for investing the recycling of ^\u003c15\u003eN in the opposite side of the half-roots supplied with ^\u003c15\u003eNO_3- (10mgN/L) in hypernodulation mutants and the parent Williams for 2 days. The percentage distribution of ^\u003c15\u003eN in nodules were higher in NOD1-3 (0.20%), NOD2-4 (0.47%), NOD3-7 (0.26%) than that in Williams (0.09%) possibly due to large mass of nodules of hypernodulation mutant lines. On the other hand, the percentage distribution of ^\u003c15\u003eN in roots was relatively lower in NOD1-3 (1.36%), NOD2-4 (1.20%), NOD3-7 (1.26%) than that in Williams (1.58%). The sum of the percentage distribution of ^\u003c15\u003eN in the nodules and roots were almost the same between hypernodulation lines and the parent Williams. These results indicate that recycling of N from shoot to underground parts may not be the main cause of nitrate tolerance of hypernodulation mutant lines.", "subitem_description_type": "Abstract"}, {"subitem_description": "ダイズは、土壌微生物の根粒菌と共生して大気中の窒素を固定利用できる。また、ダイズは、根から畑条件では主に硝酸態として、土壌由来の窒素を吸収できる。しかしながら、硝酸により、ダイズの根粒着生、根粒の生長、窒素固定活性が強く阻害されることが知られている。根粒形成と窒素固定に対する硝酸阻害機構として、根粒中の炭水化物の減少、根粒の酸素拡散の低下によるバクテロイドの呼吸低下、地上部の硝酸代謝産物、例えばグルタミンやアスパラギンによるフィードバック阻害など、多くの仮説が提出されている。本報告では、Williams と根粒長着生変異株について、根分法により、片側の根から与えた^\u003c15\u003eNO_3- の反対側の根への循環を調べた。2日間の処理後、非標識条件の根粒の^\u003c15\u003eN 分配率は、NOD1-3で0.20%、 NOD2-4で0.47%、NOD3-7で0.26%とWilliams の0.09%より高かった。これは、根粒超着生株の根粒が大きかったことによるのかもしれない。一方、非標識条件の根の^\u003c15\u003eN 分配率は、NOD1-3で1.36%、 NOD2-4で1.20%、 NOD3-7で1.26%とWilliams の1.58%より低かった。根と根粒の分配率の合計は、変異株と親株で同様であった。この結果は、茎葉部から地下部への窒素の再循環の違いが根粒超着生変異株の硝酸耐性の原因ではないことを示唆した。", "subitem_description_type": "Abstract"}]}, "item_7_full_name_3": {"attribute_name": "著者別名", "attribute_value_mlt": [{"nameIdentifiers": 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  1. 0 資料タイプ別
  2. 03 紀要論文
  1. 070 農学部
  2. 20 紀要
  3. 01 新潟大学農学部研究報告
  4. 第70巻

Recycling of nitrogen from shoots to underground parts in hypernodulation mutant lines of soybean by split-root experiment.

http://hdl.handle.net/10191/49934
http://hdl.handle.net/10191/49934
f328f0b3-efae-4825-874d-88eac41ffe1d
名前 / ファイル ライセンス アクション
70_1-8.pdf 70_1-8.pdf (692.3 kB)
Item type 紀要論文 / Departmental Bulletin Paper(1)
公開日 2018-04-20
タイトル
タイトル Recycling of nitrogen from shoots to underground parts in hypernodulation mutant lines of soybean by split-root experiment.
言語
言語 eng
キーワード
主題Scheme Other
主題 soybean
キーワード
主題Scheme Other
主題 hypernodulation mutant
キーワード
主題Scheme Other
主題 nitrate inhibition
キーワード
主題Scheme Other
主題 split-root system
キーワード
主題Scheme Other
主題 ^<15>N recycling
キーワード
主題Scheme Other
主題 ダイズ
キーワード
主題Scheme Other
主題 根粒超着生変異株
キーワード
主題Scheme Other
主題 硝酸阻害
キーワード
主題Scheme Other
主題 根分法
キーワード
主題Scheme Other
主題 ^<15>N 再循環
資源タイプ
資源 http://purl.org/coar/resource_type/c_6501
タイプ departmental bulletin paper
その他のタイトル
その他のタイトル 根分法によるダイズ根粒超着生変異株の茎葉部から地下部への窒素の再循環
著者 Ohyama, Takuji

× Ohyama, Takuji

WEKO 52

Ohyama, Takuji

Search repository
Ueno, Manabu

× Ueno, Manabu

WEKO 162243

Ueno, Manabu

Search repository
Ono, Yuki

× Ono, Yuki

WEKO 162244

Ono, Yuki

Search repository
Ohtake, Norikuni

× Ohtake, Norikuni

WEKO 162245

Ohtake, Norikuni

Search repository
Sueyoshi, Kuni

× Sueyoshi, Kuni

WEKO 162246

Sueyoshi, Kuni

Search repository
Sato, Takashi

× Sato, Takashi

WEKO 162247

Sato, Takashi

Search repository
Tanabata, Sayuri

× Tanabata, Sayuri

WEKO 162248

Tanabata, Sayuri

Search repository
著者別名
識別子 52
識別子Scheme WEKO
姓名 大山, 卓爾
著者別名
識別子 162250
識別子Scheme WEKO
姓名 上野, 学
著者別名
識別子 162251
識別子Scheme WEKO
姓名 小野, 雄基
著者別名
識別子 162252
識別子Scheme WEKO
姓名 大竹, 憲邦
著者別名
識別子 162253
識別子Scheme WEKO
姓名 末吉, 邦
著者別名
識別子 162254
識別子Scheme WEKO
姓名 佐藤, 孝
著者別名
識別子 162255
識別子Scheme WEKO
姓名 七夕, 小百合
抄録
内容記述タイプ Abstract
内容記述 Soybean plants can fix atmospheric dinitrogen (N_2) in root nodules by the association with soil bacteria rhizobia. Soybeans also absorb soil N from the roots, mainly in the form of nitrate in the upper fields. However, it has been known that nitrate strongly inhibits nodulation, nodule growth and nitrogen fixation activity of soybean nodules. Many hypotheses are proposed for the cause of nitrate inhibition of nodulation and nitrogen fixation, i.e., carbohydrate deprivation in nodules, decreased O_2 diffusion into nodules, which restricts the bacteroid respiration, feedback inhibition by a product of nitrate metabolism such as glutamine or asparagine. In this report, split-root system was employed for investing the recycling of ^<15>N in the opposite side of the half-roots supplied with ^<15>NO_3- (10mgN/L) in hypernodulation mutants and the parent Williams for 2 days. The percentage distribution of ^<15>N in nodules were higher in NOD1-3 (0.20%), NOD2-4 (0.47%), NOD3-7 (0.26%) than that in Williams (0.09%) possibly due to large mass of nodules of hypernodulation mutant lines. On the other hand, the percentage distribution of ^<15>N in roots was relatively lower in NOD1-3 (1.36%), NOD2-4 (1.20%), NOD3-7 (1.26%) than that in Williams (1.58%). The sum of the percentage distribution of ^<15>N in the nodules and roots were almost the same between hypernodulation lines and the parent Williams. These results indicate that recycling of N from shoot to underground parts may not be the main cause of nitrate tolerance of hypernodulation mutant lines.
抄録
内容記述タイプ Abstract
内容記述 ダイズは、土壌微生物の根粒菌と共生して大気中の窒素を固定利用できる。また、ダイズは、根から畑条件では主に硝酸態として、土壌由来の窒素を吸収できる。しかしながら、硝酸により、ダイズの根粒着生、根粒の生長、窒素固定活性が強く阻害されることが知られている。根粒形成と窒素固定に対する硝酸阻害機構として、根粒中の炭水化物の減少、根粒の酸素拡散の低下によるバクテロイドの呼吸低下、地上部の硝酸代謝産物、例えばグルタミンやアスパラギンによるフィードバック阻害など、多くの仮説が提出されている。本報告では、Williams と根粒長着生変異株について、根分法により、片側の根から与えた^<15>NO_3- の反対側の根への循環を調べた。2日間の処理後、非標識条件の根粒の^<15>N 分配率は、NOD1-3で0.20%、 NOD2-4で0.47%、NOD3-7で0.26%とWilliams の0.09%より高かった。これは、根粒超着生株の根粒が大きかったことによるのかもしれない。一方、非標識条件の根の^<15>N 分配率は、NOD1-3で1.36%、 NOD2-4で1.20%、 NOD3-7で1.26%とWilliams の1.58%より低かった。根と根粒の分配率の合計は、変異株と親株で同様であった。この結果は、茎葉部から地下部への窒素の再循環の違いが根粒超着生変異株の硝酸耐性の原因ではないことを示唆した。
書誌情報 新潟大学農学部研究報告
en : 新潟大学農学部研究報告

巻 70, p. 1-8, 発行日 2018-02
出版者
出版者 新潟大学農学部
ISSN
収録物識別子タイプ ISSN
収録物識別子 03858634
書誌レコードID
収録物識別子タイプ NCID
収録物識別子 AN00183393
著者版フラグ
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