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Accumulation pattern of toxin β-ODAP during lifespan and effect of nutrient elements on β-ODAP content in Lathyrus sativus seedlings

Published online by Cambridge University Press:  12 July 2006

CHENG-JIN JIAO
Affiliation:
Key Laboratory of Arid and Grassland Agroecology, Ministry of Education, Institute of Cell Biology/ School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China School of Life Science and Chemistry, Tianshui Normal University, Tianshui 741000, P. R. China
QUAN-LE XU
Affiliation:
Key Laboratory of Arid and Grassland Agroecology, Ministry of Education, Institute of Cell Biology/ School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
CHONG-YING WANG
Affiliation:
Key Laboratory of Arid and Grassland Agroecology, Ministry of Education, Institute of Cell Biology/ School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
FENG-MIN LI
Affiliation:
Key Laboratory of Arid and Grassland Agroecology, Ministry of Education, Institute of Cell Biology/ School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
ZHI-XIAO LI
Affiliation:
Key Laboratory of Arid and Grassland Agroecology, Ministry of Education, Institute of Cell Biology/ School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China
YA-FU WANG
Affiliation:
Key Laboratory of Arid and Grassland Agroecology, Ministry of Education, Institute of Cell Biology/ School of Life Sciences, Lanzhou University, Lanzhou 730000, P. R. China

Abstract

In order to assess the influence of nutrient elements on the accumulation of β-N-oxalyl-L-α, β-diaminopropionic acid (β-ODAP; the probable cause of lathyrism) in Lathyrus sativus L. (grass pea), it was first examined under field conditions during the lifespan of a grass pea plant using high-performance liquid chromatography (HPLC). β-ODAP mainly accumulated in young seedlings, in developing and mature seeds and in young leaves, especially in young seedlings. In contrast, all mature leaves, roots, and stems showed a low level of β-ODAP. The β-ODAP accumulation pattern in seedlings grown in a nutrient-deficient solution was highest (3·57 mg/g) in shoots at 7 d growing in the nitrogen-deficient solution and higher compared to the control (2·31 mg/g) in zinc-, calcium-, phosphorus- and molybdenum-deficient shoots (P<0·05). The contents of β-ODAP in seedlings growing in other element-deficient solutions were similar to controls. When the content of β-ODAP in grass pea seedlings fertilized with different forms of organic nitrogen was assayed the results indicated that amino acids such as glutamine and serine, as well as nucleotide nitrogen, all significantly enhanced the accumulation of β-ODAP in young seedlings relative to controls (P<0·05). Taken together, these data suggest that β-ODAP accumulation in grass pea might be related to the level of total free nitrogenous compounds and that nitrogen and phosphate may be the crucial nutrient factors influencing β-ODAP content under field conditions. Thus, the application of appropriate nitrogen and phosphorus fertilizers to the soil could decrease the content of β-ODAP in the seeds and leaves of grass pea.

Type
Crops and Soils
Copyright
© 2006 Cambridge University Press

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