What is it about?

Barley (Hordeum vulgare L.) two genotypes the wild-type (Steptoe) and the mutant (Az12) were used. An experiment was conducted using 15N-tracing method. The N-depleted seedlings were exposed to a nutrient solution containing nitrate and nitrite and plants were sampled at each (14L/10D) cycles throughout 38 h. The two genotypes utilized 15NO3- and accumulated it as reduced 15N, predominately in the shoots. Also for both genotypes root contribution increased during L/D cycles and decreased during the subsequent light cycle.

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Why is it important?

In all data measured between the two genotypes show some similarity, further experimentation is being undertaken to determine what makes the mutant grow up normally like wild type, does high NR levels in wild type control internal NO3-levels.


I hope this article makes what people might think is a boring, slightly abstract area like plant nutrition and difference in nitrate assimilation between wild type and mutant, kind of interesting and maybe even exciting.

Salwa Abdel_latif
Alexandria University

Read the Original

This page is a summary of: The difference in N metabolism between NAD(P)H-specific NR-deficient mutant and wild-type barley (Hordeum vulgare L.), Journal of Plant Nutrition, August 2019, Taylor & Francis, DOI: 10.1080/01904167.2019.1655036.
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