allantoic acid

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Related to allantoic acid: allantoic fluid

al·lan·to·ic ac·id

(ă-lan-tō'ik as'id),
Diureidoacetic acid; a degradation product of allantoin. An important source of nitrogen in plants.
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References in periodicals archive ?
On Day 5 following the initiation of the ureide treatment, in situ leaf ureide degradation measurements (Vadez and Sinclair, 2000) were made for plants that had not been subjected to the addition of allantoic acid to the nutrient solution.
In these experiments, however, 3-mM allantoic acid was added to the nutrient solution and the solution lost through transpiration was replenished on each day with the nutrient solution containing ureide.
The addition of 5-mM allantoic acid to the nutrient solution resulted in steady increases of leaf ureide concentration during the following 3 d (Fig.
Measurement of ureide concentration in leaves on Days 2 and 3 following the addition of allantoic acid to the hydroponic solution proved to be a relatively simple and an effective method for comparing genotypes.
Since leaf ureide concentrations in this genotype were sensitive to the Mn treatment, these results indicate a dependence on allantoate amidohydrolase for allantoic acid degradation.
In our earlier study (Vadez and Sinclair, 2001a), PI 507039 had very high leaf ureide concentrations for a zero-Mn treatment after allantoic acid was added to the nutrient solution.
1 except that intensive measurements of leaf ureide concentrations and degradation rates were made during the period of allantoic acid addition to the nutrient solution.
The petiole was placed in a test tube, one leaf per tube, containing either 5 mM allantoic acid or 5 mM allantoic acid + 50 [micro]M MnS[O.sub.4], and incubated under a combination of sodium and metal halide lamps (~500 [micro]mol [m.sup.-2] [s.sup.-1], Sun-brella, Environmental Growth Chambers, Chagrin, OH) for a 12-h period.