{
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            "id": "p41.1",
            "order": 1,
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            "bbox": {
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            "text": "Chapter 3: The Influence of age, auxin concentration, and auxin application method on rooting of pawpaw in a pot layering system."
        },
        {
            "id": "p41.2",
            "order": 2,
            "type": "heading",
            "bbox": {
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            "text": "Introduction",
            "attrs": {
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            "text": "The pawpaw [Asimina triloba (L.) Dunal] is a member of the Annonaceae, or custard apple family and is the largest tree fruit native to the United States (Callaway, 1990). Pawpaw fruit are large, with a creamy texture and flavor resembling a blend of mango, banana, and pineapple. The fruit are also highly nutritious (Peterson, 1990). The trees reach 5 to 10 meters in size (Dirr, 1990) and are usually found growing in the understory of forests (Willson and Schmeske, 1980). The pawpaw is being investigated as a new alternative crop for farmers in Kentucky and elsewhere in the southeastern U.S. (Layne, 1996; Pomper and Layne, 2004)."
        },
        {
            "id": "p41.4",
            "order": 4,
            "type": "text",
            "bbox": {
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            "text": "Kentucky State University in Frankfort, Kentucky, was designated as the site of the USDA National Clonal Germplasm Repository for Asimina spp. in 1995. One of the responsibilities as a repository site is to build and maintain a diverse collection of plant material, therefore investigating new forms of propagation to enhance the collection is a priority. It would be desirable to develop a method to clonally propagate pawpaw on its own roots. First, it is necessary to propagate superior genotypes true to type, and it would be preferable to develop a research propagation system to obtain currently grafted trees on their own roots, so as to not lose valuable germplasm in case of scion dieback due to winter injury or storm damage. Also, due to high variability in vigor of seedling rootstocks, it would also be desirable to clonally propagate pawpaw varieties on their own roots."
        },
        {
            "id": "p41.5",
            "order": 5,
            "type": "text",
            "bbox": {
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            "text": "There are currently no feasible methods to propagate pawpaw on its own roots. Pawpaw has proven to be extremely difficult to propagate by many methods in the past. Methods such as stem cuttings, root cuttings (Finneseth, 1997), tissue culture (Finneseth et al., 1997), and air layering (KSU, unpublished) have been investigated as possible propagation methods for pawpaw, and none have been successful. Pawpaw cultivars are currently propagated by grafting or chip budding a cultivar onto a seedling rootstock. Several studies have also shown the effect of juvenility on adventitious rooting in pawpaw. Mature pawpaw stem cuttings generally are incapable of rooting, while more"
        },
        {
            "id": "p41.6",
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            "text": "29",
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