Dennis Johnson

Dennis Johnson

Doctor of Philosophy

About

74
Publications
72,964
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Introduction
Crop plants with particular interest in date palms; conservation of palms species worldwide.
Skills and Expertise

Publications

Publications (74)
Book
Full-text available
Date palm (Phoenix dactylifera L.) is a tree belonging to the palm family (Arecaceae) and is cultivated for its sweet edible fruits. Over the past century, it has become a major commercial fruit crop and a key component of agricultural production in the world's subtropical arid and semiarid regions. A crop suited both to the low-input small-farmer...
Book
Full-text available
This book is the first volume of a comprehensive assemblage of contemporary knowledge relevant to genomics and other omics in date palm. Volume 1 consists of 11 chapters arranged in 3 parts grouped according to subject. Part I, Biology and Phylogeny, focuses on date palm biology, evolution and origin. Part II, Biodiversity and Molecular Identificat...
Book
his book is the first comprehensive assemblage of contemporary knowledge relevant to genomics and other omics in date palm. Volume 2 consists of 11 chapters. Part I, Nutritional and Pharmaceuticals Properties, covers the utilization of date palm as an ingredient of various food products, a source of bioactive compounds and the production of nanomat...
Book
This book is the first comprehensive assemblage of contemporary knowledge relevant to genomics and other omics in date palm. Volume 2 consists of 11 chapters. Part I, Nutritional and Pharmaceuticals Properties, covers the utilization of date palm as an ingredient of various food products, a source of bioactive compounds and the production of nanoma...
Book
The date palm is unquestionably the keystone tree species of agriculture insemiarid and arid lands of the Near East and North Africa, and it is nowsuccessfully being grown commercially in South Asia, Southern Africa,Iberia, the Americas and Australia. This important multipurpose palm is anessential local nutritional resource for humans and animals,...
Book
Plant breeders and geneticists are under constant pressure to sustain and expand food production by using innovative breeding strategies and introducing minor crops, which are well adapted to marginal lands, provide a source of nutrition, and have abiotic and biotic stress tolerance, to feed an ever-increasing human population. The basic concept of...
Book
Plant breeders and geneticists are under constant pressure to sustain and expand food production by using innovative breeding strategies and introducing minor crops, which are well adapted to marginal lands, provide a source of nutrition, and have abiotic and biotic stress tolerance, to feed an ever-increasing human population. The basic concept of...
Book
Plant breeders and geneticists are under constant pressure to sustain and expand food production by using innovative breeding strategies and introducing minor crops, which are well adapted to marginal lands, provide a source of nutrition, and have abiotic and biotic stress tolerance, to feed an ever-increasing human population. The basic concept of...
Article
Full-text available
The Canarian date palm, Phoenix canariensis, is one of the most representative endemic plant species of the Canary Islands, although it is better known for its significant horticultural interest because it is one of the most appreciated ornamental trees of the subtropical and tropical worlds for its ability to grow on a wide range of site types. Th...
Article
Full-text available
The term candit (Valencian) or candío (Spanish) collectively refers to a specific group of date palms predominant among those presently grown in groves along the coast of southeastern Spain. The fruits borne are small, fleshy and, usually, ripen gradually within each infructescence while still on the tree; they are sweet and highly appreciated as a...
Article
Our aim in this study is to build a model for the expansion of date palms (Phoenix spp., Arecaceae) that can be linked to domestication processes. Palaeontological and archaeobotanical evidence concerning date palm is extremely diversified around the Mediterranean Basin and in West Asia, mainly consisting of date fruit remains, but also including l...
Article
Full-text available
History of date palm agriculture in Borrego Spings, California
Article
Full-text available
Early 20th century introduction of date palm as a crop plant in the Lower Colorado River Valley.
Book
Full-text available
The basic concept of this book is to examine the best use of both innovative and traditional methods of plant breeding to develop new crop varieties suited to different environmental conditions to achieve sustainable food production and enhanced food security in a changing global climate, in addition to the development of crops for enhanced product...
Book
Plant breeders and geneticists are under constant pressure to sustain and expand food production by using innovative breeding strategies and introducing minor crops, which are well adapted to marginal lands, provide a source of nutrition, and have abiotic and biotic stress tolerance, to feed an ever-increasing human population. The basic concept of...
Book
Plant breeders and geneticists are under constant pressure to sustain and expand food production by using innovative breeding strategies and introducing minor crops, which are well adapted to marginal lands, provide a source of nutrition, and have abiotic and biotic stress tolerance, to feed an ever-increasing human population. The basic concept of...
Article
The nomenclature of the Canary Island endemic palm with red‐bluish fruits is reviewed. Phoenix senegalensis is neotypified; P. canariensis var. porphyrococca is lectotypified. “Fulchironia senegalensis” is a nomen nudum; P. menieri is a nomen superfluum.
Article
Date palm (Phoenix dactylifera L.) yields food, medicines, and materials for buildings and crafts in the Middle East, the Mediterranean and North Africa. There, date palms were represented on coins from 485 BC until 1189 AD. These palm-tree images furnish agricultural, botanical and geographical information on Phoenix. We aim to analyze the evoluti...
Chapter
Date palm is one of the oldest cultivated plants, grown in the arid and semiarid regions of the world. The date fruit serves as a vital worldwide component of the human diet and a staple food for millions of people. Unfortunately, various abiotic and biotic stresses along with agronomic constraints are hindering date productivity. Those date cultiv...
Article
Full-text available
There are three species of Phoenix (Arecaceae) in the territory of the European Union, P. canariensis, P. dactylifera and P. theophrasti, found in wild-native populations, feral, planted and intermediate states, accounting each for thousands of individuals. The EU Habitats Directive has addressed the conservation of P. theophrasti and P. canariensi...
Book
Plant breeders and geneticists are under constant pressure to sustain and expand food production by using innovative breeding strategies and introducing minor crops, which are well adapted to marginal lands, provide a source of nutrition, and have abiotic and biotic stress tolerance, to feed an ever-increasing human population. The basic concept of...
Book
This two-volume book is a valuable resource to students, researchers, scientists, commercial producers, consultants and policymakers interested in agriculture or plant sciences particularly in date palm biotechnology. Chapters in Date Palm Biotechnology Protocols: Volume 2: Germplasm Conservation and Molecular Breeding guides readers through method...
Chapter
Full-text available
The date palm (Phoenix dactylifera L.) is an archaeophyte in Spain and is the iconic species of an introduced mixed irrigated agricultural system of food crops, animal feed, grasses, and livestock. Traditionally, date palms are propagated from seed and grown for their fruits, as well as for products derived from the leaves and stem wood. The seedli...
Chapter
Full-text available
Successful future development of date palm depends largely on evaluating, utilizing, and conserving genetic resources; assessing the value of present and potential cultivars; promoting the best cultivation, processing, and marketing practices; and broadening the number of fruit and tree products. The date palm was domesticated at the dawn of agricu...
Chapter
Full-text available
Successful future development of date palm depends largely on evaluating, utilizing, and conserving genetic resources; assessing the value of present and potential cultivars; promoting the best cultivation, processing, and marketing practices; and broadening the number of fruit and tree products. The date palm was domesticated at the dawn of agricu...
Book
Full-text available
This important reference book provides a comprehensive assessment of date palm genetic resources and utilization in individual date-producing countries worldwide. The book is published in two volumes; each consists of 15 chapters written by prominent scientists of each country and supported with color illustrations and tabulated data. Volume 1 addr...
Book
Full-text available
This important reference book provides a comprehensive assessment of date palm genetic resources and utilization in individual date-producing countries worldwide. The book is published in two volumes; each consists of 15 chapters written by prominent scientists of each country and supported with color illustrations and tabulated data. Volume 1 addr...
Article
The date palm tree has hundreds of uses, many products supplying desert dwellers with resources not elsewhere available in nature. Insufficient information is known about the numerous minor ethnobotanical uses of the date palm. This study is concerned with unusual examples from the multiple reported uses of seeds, empty fruit stalks and leaf midrib...
Article
Full-text available
Periodic international meetings of date palm scientists to present the results of new research and technologies have advanced the development of modern date palm propagation, farming practices, fruit production and processing, as well as biotechnology and molecular marker technology. From the first such event in Algeria in 1931, to the recent one i...
Article
The main purpose of this study was, first, to analyse the morphology of seeds of Phoenix spp. and relevant cultivars and to assess the taxonomic value of the information generated as a means of studying the systematics and evolutionary history of the genus Phoenix. We then analysed seed morphological diversity in P. dactylifera, supported by morpho...
Article
Date palm (Phoenix dactylifera) groves are found in the Americas from the south-west USA (36°N lat.) to Chile (21°S lat.) and eastward to the Caribbean Islands; from Venezuela, 63°W long. to 117°W long. (USA) and at elevations from 0-2,000 m. However, successful production of ripe dates is possible only in arid regions of Peru, Chile, Baja Californ...
Article
Full-text available
An accelerating worldwide trend toward planting elite cultivars is leading to genetic erosion and a narrowing of the gene pool upon which the date-palm industry is based. Large numbers of seedling dates are known in many major date-growing countries, as well as in naturalized populations in Spain and the Americas where the palm was intentionally in...
Article
Full-text available
America’s date palm (Phoenix dactylifera L.) groves can be found from 36°N Lat. (USA) to 21°S Lat. (Chile) and from 63°W Long. (Venezuela) to 117°W Long. (USA), at elevations from sea level to 2,000 m (Colombia). However, successful production of ripe dates is possible only in the arid regions of Peru, Chile, Baja California (Mexico) and the southw...
Article
Full-text available
Date palm has been a cultivated tree crop for at least 5,000 years. Early date palm-specific technologies were developed to enhance crop productivity and fruit quality by means of selecting superior female palms and their propagation by offshoots. Other old innovations included crop and water management, segregation of trees by gender, artificial p...
Book
Full-text available
This important reference book is the first comprehensive resource worldwide that reflects research achievements in date palm biotechnology, documenting research events during the last four decades, current status, and future outlook. It brings together the principles and practices of contemporary date palm biotechnology. The book is essential for r...
Article
Domesticated more than 5,000 years ago in Mesopotamia, present-day Iraq, the date palm (Phoenix dactylifera) is today a major world fruit crop in its original homeland, as well as in a number of other countries where it has been introduced for commercial production. Worldwide, date fruit production stands at about 6.8 million mt per year. Ten count...
Article
Full-text available
Asia is endowed with the world's greatest palm biodiversity, and also possesses the highest diversity of palm utilization. Palms have a long history of management for both subsistence and commercial products, many of which are deeply embedded in local cultures. In Asia, traditional technologies of exploiting wild and semi-wild palm populations, as...
Article
Full-text available
The palmyra palm Borassus flabellifer,), a multipurpose tree of great utility, occurs extensively in Tamil Nadu state, India. Figuring in history, literature, and folklore of the state, it is exploited for food from the fruit and tuberous seedlings; beverage and sugar from the sap; fiber from the leaf and leafbase for brushes, cordage, weaving, and...
Article
Full-text available
Land use systems in the Northeast Region of Brazil are dominated by large holdings and extensive cultivation of perennial crops such as cashew, coconut, carnauba wax palm, babau palm and so on. The common feature which links these crops is the silvopastoral system of livestock (chiefly cattle, sheep and donkeys) grazing under them. Agrosilvicultura...
Article
The Caqueza Project and the CIAT Bean Program were evaluated for their contributions to technology development for small farmers. As a result of the close co-operation with the biological scientists on the experiment station, the CIAT Bean Program made more rapid progress in adapting and improving crop technology for region specific yield constrain...
Article
Land-use practices and recent population increases in the N Andes have upset the ecological balance and resulted in agricultural utilization of steep slopes and lowland tropical forest areas, causing deformation, accelerated erosion, increased runoff, flooding, silting of streams, and sedimentation of lakes and reservoirs. Loss of life and property...
Article
Tree crops have great potential in tropical agricultural development for the production of foodstuffs, industrial raw materials, pulp and paper, lumber, fuelwood and livestock feed. By providing a permanent vegetation canopy, tree crops can replace the natural forests and thereby minimise soil deterioration and retard erosion. The oil palm has beco...
Article
Rice is a staple of the Latin American diet and one of the most widely cultivated crops in the region Although mention of rice calls to mind carefully tended plots of irrigated land, that is not the typical method of cultivation in Latin America Over 70% of the rice grown is of the upland type, providing more than 50% of total production.

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