Purification of Citrus Tristeza Virus
Abstract
Citrus tristeza virus (CTV) was purified from bark tissues of infected lime plants. The purification procedure consisted of extraction of powdered bark tissues, filtration, and virus precipitation by polyethylene glycol. A short Cs2SO4-sucrose cushion step gradient was introduced to further purify the virus. The yield of purified virus was 4 mg/100 g bark tissue. Purified virus suspension composed of abundant threadlike particled and exhibited a UV-absorption spectrum of a nucleoprotein with a A 260/280 of 1.23. The CTV antiserum was effective for virus detection in immune-electron microscopic tests.
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