Nutrients, Free Amino Acids, and Sugar Contents inNarcissusRoots Affected by N, P, K Deficiency during Winter
| Autor: | Soraya Ruamrungsri, Takuji Ohyama, Taro Ikarashi |
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| Rok vydání: | 1996 |
| Předmět: | |
| Zdroj: | Soil Science and Plant Nutrition. 42:765-771 |
| ISSN: | 1747-0765 0038-0768 |
| DOI: | 10.1080/00380768.1996.10416624 |
| Popis: | Non-rooted bulbs of Narcissus L. cv. “Garden Giant” were planted on October 25, 1993 and cultivated under N, P, or K deficiency or in complete medium (control). The roots emerged on November 5 and were sampled on March 7, 1994. The X-ray microanalyzer images showed the distribution of N, P, K, Ca, Mg, S, and Cl in a control root. The distribution of Cl was similar to that of K and also a similar distribution was found between Ca and S. There were significant differences in the concentration of N, P, K, Ca, Mg among treatments. Interaction among nutrient levels was observed. Control roots accumulated a large amount of nitrogen (84 mg g DW-1) which was partitioned almost equally between the 80% ethanol soluble and insoluble fractions. N-deficient roots in the -N treatment, on the other hand, accumulated only about 12 mg g DW-1 nitrogen, mostly in the insoluble fraction (83% of total N). Total amino acid contents responded to N, P, or K deficiency. Glutamine was a major free amino acid in control ro... |
| Databáze: | OpenAIRE |
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