NDLI: Assimilation and transport of nitrogenous compounds originated from^{15}$N_{2}$fixation and^{15}$NO_{2}$absorption

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Assimilation and transport of nitrogenous compounds originated from^{15}$N_{2}$fixation and^{15}$NO_{2}$absorption

Content Provider	Scilit
Author	Ohyama, Takuji Kumazawa, Kikuo
Copyright Year	1979
Description	Nodulated leguminous plants utilize both combined nitrogen absorbed by roots and gaseous nitrogen fixed by root nodules. In order to elucidate the physiological role of $N_{2}$ fixation compared with $NO_{2}$ absorption, the assimilation and transport of nitrogenous compounds from these nitrogen sources were studied. One part of soybean plants was administered with labeled nitrogen gas and unlabeled nitrate, and another part with unlabeled nitrogen gas and labeled nitrate. After feeding of labeled compounds to roots, ammonia, nitrate, amino acids, amides and allantoin in nodules, roots and stems were separated, and$ ^{15}$N content of them were determined optically using JASCO NIA-l$ ^{15}$N-analyzer. In nodules supplied with$ _{15}N_{2}$, high$ _{15}$N contents were found in glutamate, alanine, serine, γ-amino-butyrate, but in roots supplied with$ $^{15}$NO_{2}$, asparagine showed the highest$ ^{15}$N content after 8 hr$ ^{15}$N feeding. In stems, aIIantoin showed the highest$ ^{15}$N content in the case of$ $^{15}$N_{2}$ treatment, and the ratio $(^{15}$N from$ $^{15}N_{2}$/^{15}$N from$ $^{15}$NO_{2}$) of allantoin showed 10-50 fold higher than the ratios of other compounds, suggesting that allantoin was actively synthesized in nodules.
Related Links	https://www.tandfonline.com/doi/pdf/10.1080/00380768.1979.10433141?needAccess=true
ISSN	00380768
e-ISSN	17470765
DOI	10.1080/00380768.1979.10433141
Journal	Soil Science and Plant Nutrition
Issue Number	1
Volume Number	25
Language	English
Publisher	Informa UK Limited
Publisher Date	1979-03-01
Access Restriction	Open
Subject Keyword	Journal: Soil Science and Plant Nutrition Plant Sciences Nitrogen Fixation Allantoin Soybean Nodule
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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