Ornithine decarboxylase and arginine decarboxylase activities were measured in roots and buds of tomato (Lycopersicon esculentum Mill. cv. Pearson ms-35) and potato (Solanum tuberosum cv. Desire) plants. In both tomato and potato, the activity of ornithine decarboxylase was the highest at the root tip, decreasing proximally. The same was true for potato buds. In vegetative buds of tomato, the h...

George Tamaki and B. A. Butt. Impact of Perillas Bioculatus on the Colorado Potato Beetle and Plant Damage. U.S. Department of Agriculture, Technical Bulletin 1581, 11 pp. 1978 The potential impact of Perillus bioculatus, a pentatomid predator, on the Colorado potato beetle, Leptinotarsa decemlineata, was evaluated by studying the biology, constructing life tables, and determining the feeding p...

To further increase our understanding of responses in potato to abiotic stress and the potato transcriptome in general, we generated 20 756 expressed sequence tags (ESTs) from a cDNA library constructed by pooling mRNA from heat-, cold-, salt-, and drought-stressed potato leaves and roots. These ESTs were clustered and assembled into a collection of 5240 unique sequences with 3344 contigs and 1...

Flexible plants, fungi and sessile animals reconfigure in wind and water to reduce the drag acting upon them. In strong winds and flood waters, for example, leaves roll up into cone shapes that reduce drag compared with rigid objects of similar surface area. Less understood is how a leaf attached to a flexible leaf stalk will roll up stably in an unsteady flow. Previous mathematical and physica...

the use of in vitro potato shoot cultures for protoplast isolation is desirable for consistent protoplast qualities. ethylene build-up in the culture vessels causes problems for leaf growth (e.g. decreasing leaf surface, dry weight and chlorophyll) in shoot culture. fifty to one hundred µm silver thiosulfate (sts) produced a larger leaf area as a source of plant material for protoplast isolatio...

Salinity is one of the major abiotic stresses that impacts plant growth and reduces the productivity of field crops. Compared to field plants, test tube plantlets offer a direct and fast approach to investigate the mechanism of salt tolerance. Here we examined the ultrastructural and physiological responses of potato (Solanum tuberosum L. c.v. "Longshu No. 3") plantlets to gradient saline stres...

Snakin-1 (SN1) is an antimicrobial cysteine-rich peptide isolated from potato (Solanum tuberosum) that was classified as a member of the Snakin/Gibberellic Acid Stimulated in Arabidopsis protein family. In this work, a transgenic approach was used to study the role of SN1 in planta. Even when overexpressing SN1, potato lines did not show remarkable morphological differences from the wild type; ...

Kumari S. (2009): Detection of Cherry leaf roll virus and Strawberry latent ring spot virus by one-step RTPCR. Plant Protect. Sci., 45: 140–143. A one-step reverse transcription-polymerase chain reaction (RT-PCR) protocol was developed and used for the detection of Cherry leaf roll virus (CLRV) and Strawberry latent ring spot virus (SLRSV). The protocol was used to test infected screen house pl...

In order to enhance the system of potato transformation and further regeneration, four potato cultivars were transformed using the Agrobacterium tumefaciens harboring â-glucuronidase (GUS) gene.The results revealed that the highest percentages of shoot formation obtained were for Spunta cv. Stem explants resulted in more callus and regeneration after transformation and selection than leaf expla...