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Effect of nitrate-N on growth and N₂ fixation by Medicago sativa, L. and Clitoria ternatea, L. [electronic resource].

By:

Wasfi, M. A

Contributor(s):

El-nour,Mawaheb E. M

Language: English Summary language: Arabic Description: P.411-417Other title:

تأثير النترات على نمو و تثبيت نتروجين الجو على نباتى البرسيم الحجازى و بسلة الفراشة [Added title page title]

Uniform titles:

Mansoura university journal of agricultural sciences, 2009 v. 34 (1) [electronic resource].

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In: Mansoura University Journal of agricultural Sciences 2009.v.34(1)Summary: Addition of nitrate significantly increased nitrogenous fractions ( NO3, T. N.,T.,S.N )*, fresh and dry weights of roots and shoots in both plant species. Carbohydrates , acetylene reduction activity ( A.R.A. ) and nodule fresh weights were significantly decreased as compared with untreated nodulated plants. The depressive effect of nitrate on acetylene reduction activity is discussed in relation to hypotheses explanining photosynthate demand for nitrate assimilation in the nodules ( assimilate deprivation or nitrite poisoning. Present data are in favour of the assimilate deprivation hypothesis.

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Addition of nitrate significantly increased nitrogenous fractions ( NO3, T. N.,T.,S.N )*, fresh and dry weights of roots and shoots in both plant species. Carbohydrates , acetylene reduction activity ( A.R.A. ) and nodule fresh weights were significantly decreased as compared with untreated nodulated plants. The depressive effect of nitrate on acetylene reduction activity is discussed in relation to hypotheses explanining photosynthate demand for nitrate assimilation in the nodules ( assimilate deprivation or nitrite poisoning. Present data are in favour of the assimilate deprivation hypothesis.

Summary in Arabic.

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