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Abstract

Asparagus is generally propagated by seed and occasionally by crown division. Crowns are usually formed underground at the base of stem (1, 2, 3, 4). To our knowledge, the formation of crowns at above-ground nodes and plant development therefrom has never been reported. Occurrence of such crowns opens the way to a rapid means of vegetative propagation. Here we describe the morphology of aerial crown formation and subsequent development of these crowns into apparently normal plants.

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-infested with C. acutatum and drip-irrigated; 3) non-infested and sprinkler-irrigated; and 4) non-infested and drip irrigated. Mother plants were thawed, infested when indicated by a 5-min dip of the roots and crowns in a suspension of 2.5 × 10 5 C. acutatum

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on squash and pumpkin fruit can develop make growers vulnerable. Specifically, in Michigan, fruit rot of processing cucurbits can be a major issue ( Hausbeck and Lamour, 2004 ; Meyer and Hausbeck, 2012 ) as well as crown and root rots of squash and

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In recent years, new gentian cultivars (particularly Gentiana triflora Pall and Gentiana scabra Bunge) have been released for production of cut flowers or potted plants. As a herbaceous perennial, gentians overwinter as a crown comprised of an

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from Eq. 1 , where PW is the weight of the whole pot at permanent wilting (PW = 6080 g). Fig. 1. ( A ) Soil water content (θ), ( B ) relative leaf water content (RWC), ( C ) midday crown water potential (ψ crown ), ( D ) midday leaf water

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Phytophthora capsici Leonian, the causal agent of crown rot, foliar blight, and fruit rot in many vegetable crops ( Hausbeck and Lamour, 2004 ). Currently, there are no commercial C. pepo cultivars immune to P. capsici , but sources of resistance to

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unproductive. Wood et al. (2004a , 2004b ) conclusively demonstrated that mouse-ear was caused by nickel deficiency. Routine foliar application of a commercially available nickel product eliminated this problem. Crown gall has the broadest host range of any

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also an important ornamental plant due to its graceful crown, straight trunk, and attractive leaves ( Jin et al. 2009 ). Additionally, the bark and leaves of Z. schneideriana are especially significant in Chinese traditional medicine ( Shao and Zhang

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produce fruit in the first 2 years was shown to reduce crown and root growth and fruit production in Year 3 relative to uncropped plants ( Strik and Buller, 2005 ). However, growers experience an increased rate of return when vigorous plants are pruned to

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. lundelliana Bailey and C. okeechobeensis ssp. okeechobeensis Bailey, have been recently studied as useful sources for disease resistance such as powdery mildew and P. capsici crown rot resistance ( Cohen et al., 2003 ; Contin and Munger, 1977

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