The role of calcium in regulating alginate-derived oligosaccharides in nitrogen metabolism of Brassica campestris L. var. utilis Tsen et Lee
Under normal (full-strength) levels of calcium in hydroponics culture, alginate-derived oligosaccharides (ADOs) increased the activity of nitrate reductase (NR), glutamine synthetase (GS), glutamate dehydrogenase (GDH), and endpeptidase (EP) in leaves by 4.04–14.41%, 23.57–190.12%, 103.44–265.21%, a...
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Published in | Plant growth regulation Vol. 64; no. 2; pp. 193 - 202 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Dordrecht
Springer Netherlands
01.06.2011
Springer Nature B.V |
Subjects | |
Online Access | Get full text |
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Summary: | Under normal (full-strength) levels of calcium in hydroponics culture, alginate-derived oligosaccharides (ADOs) increased the activity of nitrate reductase (NR), glutamine synthetase (GS), glutamate dehydrogenase (GDH), and endpeptidase (EP) in leaves by 4.04–14.41%, 23.57–190.12%, 103.44–265.21%, and 7.22–157.41% respectively compared to that in leaves of the control plants; increased the concentration of NH
4
+
-N, total nitrogen, and protein nitrogen in leaves; and decreased the concentration of nitrate in shoots. Under low (5% of the full strength) levels of calcium, ADOs had no effect on the activity of NR and GS. These results serve to confirm the role of ADOs in regulating nitrogen metabolism, which is related to the supply of calcium. ADOs induce the release of calcium from cell organelles and the cell wall into the cytoplasm to activate the enzymes involved in nitrogen metabolism. Thus Ca regulates nitrogen metabolism in Chinese cabbage through ADOs. |
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Bibliography: | ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-Feature-1 content type line 23 |
ISSN: | 0167-6903 1573-5087 |
DOI: | 10.1007/s10725-010-9557-7 |