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Biotechnology portal

Welcome to the biotechnology portal. Biotechnology is a technology based on biology, especially when used in agriculture, food science, and medicine.

Of the many different definitions available, the one declared by the UN Convention on Biological Diversity is one of the broadest:

"Biotechnology means any technological application that uses biological systems, living organisms, or derivatives thereof, to make or modify products or processes for specific use." (Article 2. Use of Terms)

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  • In DNA sequencing projects, what is a set of overlapping DNA segments derived from a single genetic source that can be used to deduce the original DNA sequence? - Answer

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Bioinformatics - Biotechnology companies - Biotechnology law - Biotechnology products - Cell imaging - Cloning - Genetic engineering - Genetically modified organisms - Molecular genetics - Stem cells
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Agrobacterium tumefaciens galls

Agrobacterium tumefaciens is a species of bacteria that causes tumors (commonly known as 'galls' or 'crown galls') in dicots (Smith et al., 1907). This Gram-negative bacterium causes crown gall by inserting a small segment of DNA (known as the T-DNA, for 'transfer DNA') into the plant cell, which is incorporated at a semi-random location into the plant genome.

Agrobacterium is an alpha proteobacterium of the family Rhizobiaceae, which includes the nitrogen fixing legume symbionts. Unlike the nitrogen fixing symbionts, tumor producing Agrobacterium are parasitic and do not benefit the plant. The wide variety of plants affected by Agrobacterium makes it of great concern to the agriculture industry (Moore et al., 1997).

Note that Agrobacterium is not the only or most common source of galls on plants. Many are caused by insect larvae that secrete plant growth hormones and have the same effect.

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