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production because it allows production of uniform plants ( Davies et al. 2018 ; Dole and Gibson 2006 ). Several factors, including the timing of cutting collection, the selection of tissues for cuttings, cutting length, growing medium, methods of wounding

Open Access

Wound healing in cucumber fruit (Cucumis sativus L., cv. Calypso) was studied using histological and degradative techniques. A thick exudate appeared at the wounded surface shortly after wounding. This material retarded water loss and possibly aided in the formation of sclerified parenchyma observed 24 hours after wounding. The sclerified material was positive to a modified Weisner stain, indicating lignification was occurring. Wound periderm (cork) was initiated directly beneath the sclerified parenchyma cells within 48 hours after wounding. The cork layers were positive to Sudan IV stain, indicating suberin was being formed. The rate of phellem development decreased by 6 days after wounding. By day 7, younger phellem cells and sclerified parenchyma cells were stained by Sudan IV. Degradation of the wound tissue by chemical procedures demonstrated that relatively large amounts of lignin and suberin were deposited during healing. Fragments from the lignin degradation Indicated that lignin was composed mainly of gualacyl and p-hydroxyphenyl residues. Suberin was found to contain mainly 1,16-hexadecane and 1,18-osctadecene decarboxylic acids detected as the silylated diol derivatives.

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DeLaune, 1994 ; St. Hilaire, 2003 ; Zhou, 2005 ) or wounding the basal portion of the cutting ( Zhou, 2005 ) are the most common of these treatments. Management of the ortet has also been tested by making the timing of cutting harvest the independent

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Cycas species. C = cortex; CM = vascular cambium; DC = dead cells; P = pith; PG = phellogen; PH = phloem; PM = phellem (cork); R = xylem ray; Star = position of safranin injection hole; WP = wound parenchyma; X = xylem. Scale bar = 2 cm in A and F

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developmental process to achieve its removal on completion of its function or to achieve the dispersal of its contents. Alternatively, abscission may occur in response to different types of stress such as drought or wounding resulting from insect, pathogen, or

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growing season. Therefore, the objective of the present study was to examine the need for an auxin treatment and basal wounding treatment to optimize rooting of hardwood cuttings of confederate rose. Auxin treatments are commonly used in commercial plant

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Five tree species, Platanus occidentalis L., Fraxinus americana L., Quercus palustris Muench., Liriodendron tulipifera L., and Gleditsia triacanthos L. f. inermis (L.) Zabel were wounded for 4 consecutive years. Four whorls of circular wounds or one whorl of elliptical wounds were cut into the trunk at widths of 10, 13, 17, and 25 mm. Tree growth was not measurably reduced by trunk wounding. Wound closure per unit of radial growth differed by species and annual growth.

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Abstract

Trunk wounds and branch pruning wounds were made on 5 to 7 m tall white ashes, honey locusts, and pin oaks. The amount of healing of each wound and the amount of trunk growth of each tree were measured for 3 years. The rate of healing of wounds was directly correlated with radial growth of the tree. Elliptical wounds, originally 50 mm wide, on all 3 tree species, decreased in width each year by 2.6 mm per 1 mm radial growth. The single most important dimension of a wound affecting rate of healing was width. The variables of wound shape, facing direction, height, and type of wound dressing affected rate of healing little, if at all. Healing of wounds occurred during the season of the year when trunk growth occurred.

Open Access

that strawberry fruit must be at least 3/4 red ( USDA, 2006 ). Bruising occurs mainly during harvesting, packing, and transportation for horticultural crops ( Prussia and Shewfelt, 1993 ). When plant tissues are wounded, the physical and metabolic

Open Access

Abstract

A standard practice for many decades has been for homeowners and arborists to prune tree limbs flush with the trunk and to paint over the wound surface with a tree wound compound. This practice still exists today with many homeowners and some arborists. The use of tree wound compounds is claimed to be of little value (4-6). We investigated this practice in the humid, warm, extended growing seasons of the deep south of the United States.

Open Access