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The Dirt for June 7 2012 | For seed giveaways, daily tips and plant info, come join us on facebook! https://www.facebook.com/thegardengeeks

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Dorothy Crowfoot Hodgkin (1910-1994) was a founder of protein crystallography. Hodgkin and her mentor, J.D. Bernal, were the first to successfully apply X-ray diffraction to biological crystals. She identified the structures of cholesterol, lactoglobulin, ferritin, tobacco mosaic virus, penicillin, and vitamin B-12. She also described the structure of insulin in 1969, a problem on which she worked for 34 years.

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Tomato mosaic virus and tobacco mosaic virus. Tomato mosaic virus (ToMV) can cause yellowing and stunting of tomato plants, resulting in loss of stand and reduced yield. In addition, the virus may cause uneven ripening of fruit, further reducing yield. Tobacco mosaic virus (TMV) was once thought to be more common on tomato, but the two viruses are hard to distinguish easily and tobacco mosaic virus is usually (though not exclusively) more of a tobacco pathogen than a tomato pathogen. The…

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Tobacco Mosaic Virus is a positive sense single stranded RNA virus which infects plants. This infection causes characteristic mottling and discolouration of the leaves and it wasn't until 1930 that it was discovered as a virus.

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