Cloning and Characterization of a Gene Responsible for the Lathyrus sativus Neurotoxin Degradation

Sukanya, R.; Santha, I. M.; Mehta, S. L.

doi:10.1007/bf03262929

Cited by 8 publications

(1 citation statement)

References 7 publications

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“…Much work has been done in grass pea on lowering its toxicity using different methods (Department of Chemistry, Lanzhou University 1975;Chen et al 1980 ;Yu et al 1994) and on the selection of low toxicity varieties (Chen et al 1992;El-Moneim & Cocks 1993;Campbell et al 1994;Bao et al 1995). Much attention has been paid to the biosynthesis and degradation pathway of ODAP in grass pea (Malathi et al 1970;Lambein et al 1990;Kuo & Lambein 1991;Sukanya et al 1993;Khan et al 1993;Kuo et al 1994;Praveen et al 1994;Kuo et al 1998). The previous studies raised some possibilities for lowering the toxicity in grass pea and selecting low toxicity varieties, combined with bio-techniques and gene engineering methods (Kuo et al 2000 ;Qin et al 2000), but they mainly focused on grass pea ODAP and ignored the ecophysiology of grass pea.…”

Section: Introductionmentioning

confidence: 99%

Relationships between stomatal character, photosynthetic character and seed chemical composition in grass pea at different water availabilities

2004

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SU MMARYGrass pea (Lathyrus sativus) is a potentially valuable feed and food crop in semi-arid regions. Much work has been done on lowering toxicity and on selection of low toxicity varieties, while research on the eco-physiological characteristics of grass pea is very rare. Stomatal character, photosynthetic character and seed chemical composition were measured in four varieties of L. sativus to investigate their relationships at different water availabilities. For L. sativus cv. Yongshou (YS), L. sativus cv. Dingxi (DX), L. sativus cv. Heilongjiang (HLJ) and L. sativus cv. Xide (XD), stomatal density was in the order XD>HLJ>DX>YS under both control and drought conditions. Stomatal aperture, photosynthetic rate (Pn), transpiration rate (E), and the concentrations of seed b-N-oxalyl-L-a, b-diaminopropionic acid (ODAP), protein and starch were in the order YS>HLJ>DX>XD, while the opposite order was found for water use efficiency (WUE). Under drought conditions, stomatal aperture, Pn and E were lower than those under the control, while the other parameters were higher. A significant positive correlation was observed between stomatal density and WUE, while negative correlations were found between stomatal density and the remaining parameters. Obvious positive correlations were also observed between stomatal aperture and Pn, E, the concentrations of seed ODAP, protein and starch, while a negative correlation appeared between stomatal aperture and WUE. Under drought conditions, R 2 values were more comparable with the control. Intriguingly, the R 2 values of stomatal aperture were higher than of stomatal density, especially under drought conditions. These results indicate that stomatal aperture may be more closely related to photosynthetic character and seed chemical composition in grass pea, and water deficit may enhance the correlations.

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