Preparation of megabase-size DNA from plant nuclei

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Rapid preparation of megabase plant DNA from nuclei in agarose plugs and microbeads.

Conventional methods for preparation of megabase plant DNA require a protoplast preparation step (1—5). Preparation of protoplasts is tedious and time-consuming. In contrast isolation of nuclei from leaf tissue is simple. Many researchers have attempted to prepare megabase DNA from nuclei (e.g., 3-6) , but no success has been reported. As an alternative approach Guidet and Langridge (6, 7) desc...

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Protection of megabase-sized chromosomal DNA from breakage by DNase activity in plant nuclei.

A prerequisite for constructing a physical map that spans an entire plant chromosome is isolation of intact chromosome-sized DNA. Two methods are commonly used to isolate megabase (Mb)-sized DNA from plant materials, i.e., from protoplasts (1) or from nuclei (3,5). Isolated protoplasts or nuclei are embedded in low-melting-point agarose to form either plugs or microbeads. DNA molecules are isol...

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Critical behavior of megabase-size DNA toward the transition into a compact state.

We studied the changes in the higher-order structure of a megabase-size DNA (S120-1 DNA) under different spermidine (SPD) concentrations through single-molecule observations using fluorescence microscopy (FM) and atomic force microscopy (AFM). We examined the difference between the folding transitions in S120-1 DNA and sub-megabase-size DNA, T4 DNA (166 kbp). From FM observations, it is found t...

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Plant DNA detection from grasshopper guts: A step-by-step protocol, from tissue preparation to obtaining plant DNA sequences1

UNLABELLED PREMISE OF THE STUDY A PCR-based method of identifying ingested plant DNA in gut contents of Melanoplus grasshoppers was developed. Although previous investigations have focused on a variety of insects, there are no protocols available for plant DNA detection developed for grasshoppers, agricultural pests that significantly influence plant community composition. • METHODS AND RE...

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ژورنال

عنوان ژورنال: The Plant Journal

سال: 1995

ISSN: 0960-7412,1365-313X

DOI: 10.1046/j.1365-313x.1995.07010175.x