Lepidium sativum

GLENDENING, T.M., POULTON, J.E., Glucosinolate biosynthesis. Sulfation of desulfoglucosinolate by cell-free extracts of cress (Lepidium sativum L.) seedlings, Plant Physiol., 1988,86, 319-321. 

Cress (Lepidium sativum) and radish (Raphanus sativus) are small seeds, quick to germinate and sensitive to phytotoxic (plant damaging) substances like the organic acids temporarily present in immature composts. 

Cabbage Brassica oleracea Capitata Group) Cauliflower Brassica oleracea Botrytis Group) Chinese cabbage Brassica rapa Pekinensis Group) Cress Lepidium sativum)... 

Sorghum Sorghum bicolor (L.) Moench Cress Lepidium sativum L. 

The germination of the monocotyle Setaria italica and the dicotyle Lepidium sativum is inhibited by the mycorrhizins, e.g. 123, lachnumon (124), and halogenated isocoumarin derivatives, like 125, which have been isolated from the ascomycete Lachnum papyraceum [98]. 

Four bioassays a) 30 min acute bacterial test (Vibrio fischeri) b) 8d growth rate aquatic plant test (Lemna minor) c) 72h germination plant test (Lepidium sativum) and 8d root elongation plant test (Lepidium sativum) d) 72h germination plant test (Brassica rapa) and 8d root elongation plant test (Brassica rapa) Municipal and industrial solid waste leachates originating from landfills Unspecified pretreatment... 

Seeds of lettuce (Lactuca sativa L. cv. Roman), cress (Lepidium sativum L. cv. Comun), and onion (Allium cepa L. cv. Valenciana), were obtained from FITO, S.L. (Barcelona, Spain). Seeds of wheat and barley (Hordeum vulgare L) were obtained from Rancho La Merced, Junta de Andalucia, Jerez, Spain. All undersized or damaged seeds were discarded, and the assay seeds were selected for uniformity. Bioassays were carried out in 9 cm 0 plastic Petri dishes, using Whatman 1 filter paper as support. 

The general procedure for seedling bioassay was as follows 25 seeds of each species were placed per dish, excepting Hordeum vulgare (10 seeds per dish), with 5 mL of the test solution, and incubated in the dark at 25°C. Four replicates for each concentration were set up. Germination and growth time varied for each plant species Lepidium sativum, 3 days Lactuca sativa and Hordeum vulgare, 5 days and Allium cepa, 7 days. 

GMELIN, R., VIRTANEN, A.I., A new type of en2ymatic cleavage of mustard oil glucosides. Formation of allylthiocyanate in Thlaspi arvense L. and benzylthiocyanate in Lepidium ruderale L. and Lepidium sativum L., Acta Chem. Scand., 1959, 13, 1474-1475. 

Phenylpropanoid) asiatica, Draba nemorosa, Lepidium sativum, from hens fed on... 

Burow, M., Bergner, A., Gershenzon, J. and Wittstock, U. (2007) Glucosinolate hydrolysis in Lepidium sativum - identification of the thiocyanate-forming protein. Plant Mol. Biol., 63, 49-61. 

Durham, PL. and Poulton, J.E. (1990) Enzyme properties of purified myrosinase from Lepidium sativum seedlings. Z. Naturforsch., 45c, 173-8. 

Formation of the thiocyanate (94) is believed to be caused by enzymatic rearrangement (E) of the isothiocyanate (54) although direct formation from the glucosinolate has not been excluded (95). It occurs in homogenized Eruca sativa plants but not seed (95), and in Lepidium sativum seed powder but not T. majus (54, 96). The isothiocyanate is initially (10-15 sec) formed in substantial quantities but immediately decreases to a low level (97, 98). Addition of mustard myrosinase to heated Lepidium seed powder produces only isothiocyanate (56). 

The mode of substitutions of the molecules may trigger effects on monocots and dicots. Thus, 5-chloro-6-methoxy-2-benzoxazolinone was fovmd to be especially toxic to the monocots Avena sativa, Phleum pratense L., Digitaria sanguinalis (L.) Scop., and Lolium multiflorum Lam. [99]. The dicots Amaranthus caudatus L., Lepidium sativum, and Lactuca sativa were less affected. The molecular reasons for the switch in sensitivity were, however, not discussed. 

---