1. Plant regeneration from petal protoplast culture ofPetunia hybrida

   • Man-Ho Oh
   • Sang-Gu Kim

   Regular Paper Pages: 275 - 283

2. Genotypic differences in cold tolerance are masked by high sucrose and cytokinin in shoot cultures of sugarbeet

   • Philip J. Dix
   • Iseult Finch
   • James I. Burke

   Regular Paper Pages: 285 - 290

3. Agrobacterium rhizogenes—transformed plant roots as a source of grapevine viruses for purification

   • R. Lupo
   • G. P. Martell
   • V. Savino

   Regular Paper Pages: 291 - 301

4. Exogenous polyamines improve rooting of hazel microshoots

   • Manuel Rey
   • Carmen Díaz-Sala
   • Roberto Rodríguez

   Regular Paper Pages: 303 - 308

5. In vitro storage ofXanthosoma spp. under minimal growth conditions

   • E. A. Zandvoort
   • M. J. H. Hulshof
   • G. Staritsky

   Regular Paper Pages: 309 - 316

6. Genetic transformation of the apple scion cultivar ‘Delicious’ viaAgrobacterium tumefaciens

   • Sridevy Sriskandarajah
   • Peter B. Goodwin
   • Jim Speirs

   Regular Paper Pages: 317 - 329

7. Morphological control and mensuration of potato plantlets from tissue cultures for automated micropropagation

   • Victor Alchanatis
   • Kalman Peleg
   • Meira Ziv

   Regular Paper Pages: 331 - 338

8. Tissue culture ofKarwinskia humboldtiana—a plant producing toxins with antitumoural effects

   • Desana Li\>sková
   • José Ruiz Ordóñez
   • Alfredo Piñeyro López

   Regular Paper Pages: 339 - 343

9. Factors affecting variability in anther culture and in conversion of androgenic embryos ofSolanum phureja

   • Karen Teten Snider
   • Richard E. Veilleux

   Regular Paper Pages: 345 - 354

10. The effects of silver nitrate, colchicine, cupric sulfate and genotype on the production of embryoids from anthers of tetraploid wheat (Triticum turgidum)

    • Maryam Ghaemi
    • Ahmad Sarrafi
    • Gilber Alibert

    Regular Paper Pages: 355 - 359

11. Influence of auxin type and concentration on peanut somatic embryogenesis

    • Charleen M. Baker
    • Hazel Y. Wetzstein

    Regular Paper Pages: 361 - 368

12. In vitro culture ofXanthium strumarium (Cocklebur)

    • Jane P. Ellis
    • N. D. Camper

    Research Note Pages: 369 - 372

13. Micropropagation ofVerbena tenera by node culture

    • T. Hosoki
    • S. Katahira

    Research Note Pages: 373 - 375

14. Regeneration of plantlets through organogenesis in the Himalayan yellow poppy,Meconopsis paniculata

    • I. M. Sulaiman

    Research Note Pages: 377 - 380