. Social acceptability and eco-developmental problems associated with biofuel production. To overcome this problem we have always thought of Fences for fuel programme in which we introduce Jatropha or Castor as fence crops and in long run it may cover more than 40, 000 has in decentralised manner on individual farms. Peoples participation will reduce the costs and eco-damage by monoculture of Jatropha could be avoided.

PEPcase determinations As a key enzyme in C4-photosynthesis and Crassulacean Acid Metabolism (Kluge, 1983), phosphoenolpyruvate carboxylase (EC 4.1.1.31) has been studied intensively in several laboratories, particularly in the last decade. In most studies, the reaction catalyzed by PEPCase (PEP + HCO~- Mg2+, oxaloacetate + Pi) is coupled with malate dehydrogenase (EC 1.1.1.37) to the oxidation of NADH (oxaloacetate + NADH ~ malate + NAD + ) and the enzymic activity is measured by the rate of decrease in absorbance at 340 nm (Lane et al. 1969). Direct measurements of oxaloacetate, either by spectroscopy at 280 nm (Jones et al. 1978) or by 14CO2 incorporation (Goatly and Smith, 1974) are also used, though less frequently.

Calotropis procera (Ait.) Ait. f. giant milkweed ASCLEPIADACEAE Synonym: Asclepias procera Ait. General Description.—Giant milkweed is also known as sodom apple, calotrope, French cotton, small crown flower (English), algodón de seda, bomba (Spanish), cotton-france, arbre de soie, and bois canon (French) (Howard 1989, Liogier 1995, Neal 1965, Parrotta 2001). This plant is a soft-wooded, evergreen, perennial shrub. It has one or a few stems, few branches, and relatively few leaves, mostly concentrated near the growing tip. The bark is corky, furrowed, and light gray. A copious white sap flows whenever stems or leaves are cut. Giant milkweed has a very deep, stout taproot with few or no near-surface lateral roots. Giant milkweed

1 JATROPHA CURCAS: HIGH YIELDIG ACCESSIONS AND IMPROVEMENT. A. Kumar, A. Kumari Energy Plantation Demonstration project and Biotechnology Center Bio-Technology Lab Department of Botany University of Rajasthan, Jaipur - 302 004 E mail: msku31@yahoo.com ABSTRACT: Jatropha curcas has now being extensively grown in India under the Department of Biotechnology supported micro mission projects with an object to identify, characterize and multiply high yielding strains and study their growth and productivity under different agro climatic conditions. In Rajasthan, Jatropha grows wild in south east Rajasthan which lies on south east side of Aravalli hill range which roughly divides the state in semi-arid and arid regions. Banswara, Bhilwara,

1 The early colonizers : Some of the early colonizers including small ephemerals include: Polygala erioptera DC.; Polycarpaea corymbosa (L.) Lamk. ; Gisekia phamacioides L ; Mollugo cerviana (L.) Ser. ; Side ovals Forsk. ; Corchorus tridens L. ; Triumfetta pentandra A. Rick. ; Indigofera essiliflora DC. ; I. linnaei Ali. These plant species have their value as initial colonizer and are not suitable as biomass resource because" their yield potential is very low. These early colonizers provide helpful association for any subsequent plant to come in the succession like Artemisia scoparia Waldst. ; Farsetia hamiltonii Royle. ; Tephrosia purpurea (L.) Pers ; Citrullus colocynthis (L.) Schrad.; Boerhavia diffuse L. and other herbs.

S containing bioactive cancer preventive compounds in almost all major genera and in every class of primary and secondary metabolites of Euphorbiaceae. The glucosinolates are especially abundant among families of the order Capparales: Tovariaceae, Resedaceae, Capparaceae, Moringaceae, and Brassicaceae. Families outside the order exhibit occasional occurrence and include the Caricaceae, Euphorbiaceae, Gyrotemonaceae, Limnathaceae, Salvadoraceae, and Tropaeolaceae (Fenwick et al. 1983). A recent literature review provides a comprehensive list of all species known to contain glucosinolates (Fahey et al. 2001). In Euphorbiaceae it is abundant in the Genus Drypetes, and apparently no other genera of this family is said to have these compounds (Rodman 98).