Origin of oxalic acid in Ca oxalate crystals in the Malpighian tubes of the tent caterpillar, Malacosoma neustria testacea
1969; Elsevier BV; Volume: 15; Issue: 3 Linguagem: Inglês
10.1016/0022-1910(69)90288-1
ISSN1879-1611
AutoresSusumu Takahashi, Ginjiro Suzuki, Eiji Ohnishi,
Tópico(s)Insect-Plant Interactions and Control
ResumoAbstract Malacosoma neustria testacea accumulates crystals of Ca oxalate monohydrate in the Malpighian tubes abundantly. The mode of accumulation in the fifth instar larvae was followed by estimating the calcium content of the Malpighian tubes. To determine the incorporation of the radioactivity into Ca oxalate, glucose-U- 14 C, Na citrate-1,5- 14 C, glycine-1,2- 14 C, Na oxalate-1,2- 14 C, and Ca oxalate-1,2- 14 C were administered by mouth or by injection into the larvae. The results revealed that most of the oxalic acid in the crystals comes from dietary oxalic acid. A minor pathway of oxalic acid formation from glycine is also indicated.
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