Use of Unrooted Grafted Vegetable Cuttings: I.Effects of Healing Duration and TransportationTemperature

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ogyto overcome soil-borne diseases and pests and to add extravigor to the plants under various environmental stress conditions.In order to advance the use of grafting in U.S. vegetable productionin open fields, key issues to address include 1) increasingthe propagation capacity to meet the expected large number ofseedlings necessary to supply the demands of typically largefarms and 2) reducing production costs. Traditionally, vegetablegrafting is a labor-intensive process involving much training andlogistics. However, the seasonal nature of nursery operationsdue to the limitation of transportation of the grafted seedlingsis problematic when nurseries are interested in introducingvegetable grafting to serve producers who are interested in usingthe technology. To address this issue, we examined factorsaffecting quality and growth of unrooted grafted cuttings as ameans to improve the distribution of grafted materials and fornurseries to centralize the labor-intensive grafting operation toserve producers in various regions (i.e., various planting seasons).Grafted tomato and watermelon cuttings (‘Durinta’ tomato or‘Tri-X 313’ watermelon scion with ‘Aloha’ tomato or ‘StrongTosa’ interspecific hybrid squash rootstock’, respectively) wereharvested after 0, 1, 3, 5, or 7 days of healing after grafting andkept for 72 hours in a dark chamber maintained at 10 (tomato),12 (watermelon) or 20 °C (both species). The results showed thatit required a minimum of 3 and 5 days of post-grafting healingfor tomato and watermelon, respectively, before harvest in orderto maintain growth and development rates after 3-day simulatedtransportation, as equivalent to non-treated cuttings (control).Transportation at a lower temperature (10 °C for tomato or 12 °Cfor watermelon) seems to contribute to maintaining better visualcutting quality than 20 °C. Although more research needs tobe done to establish protocols suitable for various species andscion-rootstock combinations, effective use of unrooted graftedcuttings in nurseries with and without grafting capabilities maybecome a breakthrough technology to advance the use of graftedplants in the United States.
Lingua originaleEnglish
Numero di pagine1
Stato di pubblicazionePublished - 2013


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