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Timothy K. Broschat

Fertilization requirements for palms growing in mineral soils differ greatly from those growing in largely organic container substrates ( Broschat, 2009 ). Pine bark is a common component of container substrates in southeastern United States, but

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ChihCheng T. Chao and Robert R. Krueger

HISTORY OF DATE PALMS Date palm ( Phoenix dactylifera L.) has long been one of the most important fruit crops in the arid regions of the Arabian Peninsula, North Africa, and the Middle East. During the past three centuries, dates were also

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Peng Shi, Yong Wang, Dapeng Zhang, Yin Min Htwe and Leonard Osayande Ihase

African oil palm ( Elaeis guineensis Jacq.) is an important woody oil crop that is widely cultivated in tropical regions all over the world ( Adjei-Nsiah et al., 2012 ; Gutiérrez-Vélez et al., 2011 ; Murphy, 2009 , 2014 ; Sayer et al., 2012

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Antar Nasr El-Banna, Mohammed Elsayed El-Mahrouk, Mohammed Eraky El-Denary, Yaser Hassan Dewir and Yougasphree Naidoo

Palms are flowering plants belonging to the family Arecaceae within the class of monocots. They are classified into 181 genera and roughly 2600 currently known species of ornamental palms ( Christenhusz and Byng, 2016 ), most of which are restricted

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John L. Griffis Jr

Palm Trees: A Story in Photographs. David Leaser. 2005. Westwood Pacific Publishing, 12021 Wilshire Blvd., Ste. 200, Los Angeles, CA 90025. 144 p., incl. index., illus., $39.95, hardcover. ISBN 1-595588-010-0. This is a very attractive, large

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Timothy K. Broschat and Kimberly Anne Moore

the southern Atlantic coastal plain, nutrient deficiencies are common and corrective or prophylactic fertilization may be needed ( Gilman, 1987 ; Gilman et al., 2000 ). Palms (Arecaceae) in particular, which have high potassium, magnesium, and

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Donald R. Hodel

Palms (Arecaceae) are perhaps the most distinctive group of ornamental landscape plants, comprising a natural group that even lay people can readily identify. Palms are increasingly common in outdoor landscapes in tropical and subtropical regions

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Joseph DeFrank and Charles R. Clement

Pejibaye (Bactris gasipaes Kunth, Palmae) is being evaluated for production of fresh heart of palm in Hawaii. Precocity, yields, and weed control were evaluated in response to woven black polypropylene mat (control), oryzalin, oxyfluorfen, and paraquat. Control plots attained 100% of plants harvested by 26 months, followed by oxyfluorfen (97.5%), oryzalin (77.5%), and paraquat (60%). Estimated heart of palm yields (3731 plants/ha) were similar with oxyfluorfen 1.2 kg a.i./ha (707 kg·ha–1), polypropylene mat (612 kg·ha–1), oxyfluorfen 0.6 kg a.i./ha (600 kg·ha–1), and oryzalin 4.5 kg a.i./ha (478 kg·ha–1). Based on precocity, yields, and weed control efficiency, the performance rating of these weed control treatments was mat ≈ oxyfluorfen > oryzalin > paraquat. Chemical names used: 4-(dipropylamino)-3,5-dinitrobenzenesulfonamide (oryzalin); 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene (oxyfluorfen); 1,1′-dimethyl-4-4′-bibyridinium ion (paraquat).

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Jinggui Fang and ChihCheng T. Chao

DNA methylation plays an important role in the regulation of gene expression in eukaryotes. The extent and patterns of DNA methylation were assessed in the date palm (Phoenix dactylifera L.) mother plants and their offshoots using the methylation sensitive amplified polymorphism (MSAP) technique. Three types of bands were generated using 12 pairs of primers. Type I bands were present in both EcoR I + Hpa II and EcoR I + Msp I lanes; type II bands were present in EcoR I + Hpa II lanes, but not in EcoR I + Msp I lanes; and type III bands were present in EcoR I + Msp I lanes, but not in EcoR I + Hpa II lanes. The total numbers of these three types of bands were 782, 55, and 34. Among these three types of bands, the polymorphic bands were 34, 10, and 0, respectively. The distribution of polymorphic bands among mother-plants and offshoots could suggest the methylation variation occurred to the mother plants and offshoots. The methylation variation during offshoot growth of date palm was characterized as a process involving mainly of demethylation. Hypomethylation of DNA in offshoots compared with mother plants reflects the marked expression of this molecular feature, which may related to gene expression during development of offshoots. The methylation or demethylation status of specific loci in the mother plants and their offshoots might not relate their lineage but occurred randomly.

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Dennis R. Pittenger, Donald R. Hodel and A. James Downer

Successful reestablishment of transplanted palms [members of the Arecaceae (Palmae)] depends on rapid regeneration of roots, avoiding injury and desiccation of the trees during transit and handling, and maintaining sufficient soil moisture around the root balls after transplanting. Since landscape contractors and nurserymen spend considerable resources and labor transplanting specimen palms, understanding the seasonality of palm root growth, how palm roots respond when trees are dug, and the effects of canopy manipulation during transplanting will enable them to adopt effective and rational transplanting practices. This manuscript provides a review of research findings that can be applied to maximize reestablishment of transplanted specimen palms.