Potential of sunflower, castor bean, common buckwheat and vetiver as lead phytoaccumulators

Proteases and Peptidases of Castor Bean Endosperm

The endosperm of castor bean seeds (Rkinus comunuis L.) contains two -SH-dependent amptidases, one hydrolyzing L-leucine-,Bnaphthylamide optimally at pH 7.0, and the other hydrolyzing L-proline,B-naphthylamide optimally at pH 7.5. After germination the endosprm contains in addition an -SH-dependent hemoglobin protease, a serinedependent carboxypeptidase, and at least two -SH-dependent enzymes h...

Lectins in castor bean seedlings.

The amounts of the two lectins (ricin and Ricinus communis agglutinin) in tissues of castor bean seedlings were followed during germination and early growth. For measurement, lectins in extracts were separately eluted from Sepharose columns; an antibody to the agglutinin was also used to detect the lectins by immunodiffusion. The endosperm of the dry seed contains 3.5 mg total lectin (5.6% of t...

Phosphatidylcholine synthesis in castor bean endosperm : free bases as intermediates.

The methylation steps in the biosynthesis of phosphatidylcholine by castor bean (Ricinus communis L.) endosperm have been studied by pulse-chase labeling. Endosperm halves were incubated with [methyl-(14)C]S-adenosyl-l-methionine, [2-(14)C]ethanolamine, [(14)C]ethanolamine phosphate, or [(14)C]serine phosphate. The kinetics of appearance were followed in the free, phospho-, and phosphatidyl-bas...

First Report of Colletotrichum fructicola as the causal agent of Anthracnose on Common Bean and Cowpea

Phosphatidylcholine synthesis in castor bean endosperm.

Three pathways for phosphatidylcholine synthesis were assayed in castor bean (Ricinus communis var. Hale) endosperm. Phosphatidylethanolamine: S-adenosylmethionine methyl transferase occurred predominantly in the endoplasmic reticulum fraction, but some activity appeared in the mitochondria. Phosphorylcholine glyceride transferase occurred exclusively in the endoplasmic reticulum. The phosphory...