Cacti: Biology and Uses

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The Cactaceae family, with about sixteen hundred species, is cultivated worldwide for fruits, forage, fodder, and even as a vegetable. Cacti are recognized for their attractive flowers, special stem shapes, and ability to tolerate drought. Because of their efficient use of water and other adaptations, biological and agronomic interest in cacti has soared. These fascinating plants also have much to teach us about biodiversity and conservation. Yet a current, synthetic, wide-ranging reference on cacti has not been available until now. This comprehensive book, compiled by a well-known cactus biologist, includes authoritative, up-to-date chapters by thirty-five contributors from around the world on topics ranging from evolution to biotechnology. It is the first book of its kind to compile information on cactus biology, ecology, and uses in one convenient place.

The first half of the book provides a thorough overview of cactus biology and morphology and discusses the environmental and conservation issues that affect the plants. It includes a discussion of the evolution of the family, paying particular attention to new genetic and molecular approaches. The second half of the book focuses on the practical concerns of cultivating cacti, such as pest control and diseases, horticultural and forage applications, and techniques for agronomy. Other chapters cover the different markets for cacti and products that are made from them.

This unique volume will be a reliable and informative reference for ecologists and environmentalists, agriculturists, plant biologists, and anyone seriously interested in these remarkable plants.

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Product Details

  • ISBN-13: 9780520231573
  • Publisher: University of California Press
  • Publication date: 7/10/2002
  • Pages: 290
  • Product dimensions: 8.50 (w) x 11.00 (h) x 0.88 (d)

Meet the Author

Park S. Nobel is Professor of Biology at the University of California, Los Angeles. He is the author of eight books, including Physicochemical and Environmental Plant Physiology (second edition, 1999), Remarkable Agaves and Cacti (1994), Environmental Biology of Agaves and Cacti (1988), and, with A.C. Gibson, The Cactus Primer (1986).

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Read an Excerpt



University of California

Copyright © 2002 Regents of the University of California
All right reserved.

ISBN: 0-520-23157-0

Chapter One


Alejandro Casas and Giuseppe Barbera

Human-Cactus Interactions in Mesoamerica
Archaeological and Historical Eveidence
Ethnobotanical Information

Domestication of Cacti
Columnar Cacti
Opuntia Species
Diffusion of Cacti to Other Regions of the World
Colonial Period
Spread of Plaryopuntias in Europe
History of Name
Naturalization in Europe
Plaryopuntias in Sicily
Expansion to Other Mediterranean Regions

Conclusions and Future Prospects
Literature Cited


Mesoamerica, the culturally defined region from central Mexico to northwestern Costa Rica (Fig. 9.1), is one of the most important centers of domestication of plants in the world (Harlan 1975). Archaeological studies suggest that domestication of plants in this region was initiated approximately 9,600 years ago (Flannery 1986). Dressler (1953) estimated that about 100 cultivated species (e.g., maize, beans, squashes, tomatoes, avocados, and prickly pears) were domesticated by pre-Columbian cultures of Mesoamerica. Actually, ethnobotanical studies indicate that several hundred species were domesticated, some only in a beginning stage and others to advanced stages, but many have been poorly studied because they are only regionally or locally important. Apart from Opuntia spp. and Hylocereus undatus, cacti are commonly omitted from checklists of domesticated plants. Nevertheless, archaeologists have revealed that several species of Opuntia as well as columnar and barrel cacti were among the most important plant resources utilized by humans in prehistoric Mesoamerica (Callen 1967; Smith 1967, 1986), and ethnobotanists have documented that dozens of species of cacti are currently utilized by indigenous peoples of this area, indicating that several species of Opuntia and columnar cacti are in advanced stages of domestication (Colunga 1984; Casas et al. 1997a, 1999a, b).

Domestication is an evolutionary process resulting from the manipulation of living organisms by humans. In this process, humans select and breed phenotypes with characteristics they consider advantageous; i.e., individual plants with better qualities as food, medicine, and other uses. Other evolutionary forces, such as genetic drift, also intervene in the selection process and may be significant in small populations caused by humans due to the isolation of individual plants or resulting from perturbation and fragmentation of natural habitats or transplantation of wild individuals into human habitats. Throughout history, human migrations, displacement of human settlements, commerce, cultural exchange, as well as conquest and colonization of new areas have been accompanied by the movement of plant and animal populations (individuals and/or their propagules) from one region to another. In some cases, migration has isolated individuals from their parental populations, and the influence of artificial selection under different cultural and environmental contexts can determine particular routes of domestication. In other cases, migration has reestablished contact between variants previously separated by natural or human processes, giving rise to new combinations of genes that are available for artificial selection. Through domestication, plant populations become morphologically, physiologically, and/or behaviorally divergent from their wild ancestors (Darwin 1868; Harlan 199z). But, as in general evolutionary processes, the inherited, genetically controlled divergence can be considered a domestication process.

Domestication of plants has generally been associated with cultivation (Harlan 199z), because artificial selection more probably occurs under successive generations of harvest and propagation of the desired phenotypes. However, domestication can also act under different forms of manipulation of wild plant populations in situ, including species of cacti (Casas et al. 1997b). Indeed, Mesoamerican indigenous peoples commonly practice a broad spectrum of interactions with plants (Alcorn 1984; Colunga 1984; Bye 1993; Casas et al. 1996, 1997a). Casas et al. (1996) group these forms of plant management into those occurring in situ (in the wild) and those occurring ex situ. Through interactions in situ, humans may take products from nature without significant perturbations, but they may also alter the structure of plant populations by increasing the quantity of target species or particular phenotypes. The main interactions in situ are: (1) gathering, which is the taking of useful plant products directly from natural populations; (2) tolerance, including practices directed to maintain, within human-made environments, useful plants already occurring there; (3) enhancement, directed to increase the population density of useful plant species, including the sowing of seeds or the intentional propagation of vegetative structures in places occupied by wild plant populations; and (4) protection, which includes conscious activities, such as the elimination of competitors or predators, fertilization, and pruning to safeguard critical wild plants. Plant management ex situ includes interactions taking place outside natural populations, in habitats created and controlled by humans, including: (1) transplantation of entire individuals and (2) sowing and planting of sexual or vegetative propagules (Casas et al. 1996, 1997a,b).

Variation among the species composing a plant community or the individuals forming a population, their differences in quality as useful resources, and the selective attitude of humans in taking advantage of some species and particular individuals and not others are the most important principles in artificial selection of plants. Ethnobotanical studies in Mesoamerica have revealed that this attitude is common among indigenous peoples and that it occurs under different interactions between humans and plants, not only under cultivation. In gathering, people usually make choices among individual plants based on their quality as a food, such as flavor, size, color, and presence of toxic substances (Casas et al. 1996, 1997a, 1999b). This selection may give rise to other types of interaction involving domestication. When they are found during the clearing of forest areas, the edible wild plant species and the preferred variants may be spared, enhanced, and/or protected in situ, whereas those species and variants whose edible parts are not preferred by people are eliminated. Over the long term such selective attitudes may modify vegetation patches in which the phenotypes desirable to humans have a better opportunity to be components of the community, and the selected components may increase their frequency in populations, another facet of plant domestication.

This chapter examines cultural and biological aspects related to the use and management of cacti among peoples of Mexican Mesoamerica and analyzes how domestication is occurring in some species. Comparisons of morphology between wild and manipulated populations of Opuntia and Stenocereus species are used to illustrate patterns of artificial selection and evolutionary trends resulting from domestication under different forms of management. This information is discussed to determine how domestication might be occurring in other cacti. The diffusion of cacti, especially platyopuntias, into other regions of the world is reviewed to examine trends in domestication of these species outside of Mesoamerica.

Human-Cactus Interactions in Mesoamerica

Archaeological and Historical Evidence

Mexico is apparently the richest area for cactus species in the world (Bravo-Hollis 1978). Cacti are among the main components of the tropical deciduous and thorn-scrub forests of subhumid tropics as well as arid and semiarid zones, which cover nearly two-thirds of the country (Toledo and Ordóñez 1993). Archaeological studies in the Tehuacan Valley, Puebla (MacNeish 1967), and at Guila Naquitz, Oaxaca (Flannery 1986), suggest that the region was inhabited by humans probably from 14,000 years before present (BP) and have found there the oldest evidence of plant domestication in the New World. Since ancient times, people of this area have used a broad spectrum of plant and animal species as resources, and cacti have been among the most important because of their abundance, diversity, and edible parts.

Prehistoric human colonization of the Mexican territory most likely occurred in a north-south direction. According to this theory, people arrived from northern Aridoamerica, the vast territory occupied by the Sonoran and Chihuahuan deserts, where prehistoric bands of hunter-gatherers interacted for a long time with cacti as main resources. Inhabitants of the prehistoric Mesoamerica exhibited a strong cultural utilization of cacti, developed by their ancestors from Aridoamerica and their own experience with local arid and semiarid environments. Later on, continual migrations of peoples (including the Aztecs) from northern Mexico into Mesoamerica progressively reinforced the development of cactus utilization among the great civilizations; this utilization persists until today.

Smith (1967) reported remains of nine cactus species (Table 9.1) from archaeological excavations of prehistoric Mesoamerican sites in caves of the Tehuacan Valley. For caves at Guila Naquitz, Smith (1986) reports stems, fruits, and seeds of Opuntia species in almost all of the stratigraphic zones studied, from nearly 12,000 years BP, as well as a gumball that could have come from a columnar cactus. Callen (1967) identified the following types of cactus remains in human coprolites of Tehuacan: (1) "Opuntia," which might represent some of the 18 species of this genus existing in the region (Arias et al. 1997); (2) "Lemaireocereus," which might represent some of the 13 species of columnar cacti of the genera Escontria, Myrtillocactus, Pachycereus, Polaskia, and Stenocereus (Casas et al. 1999a); and (3) "cactus tissue," from unidentified cacti. Callen (1967) further found that in the earliest coprolites from the El Riego phase (8,500-7,000 years BP), these types of cactus remains were a part of a wild food diet, along with Setaria spp. seeds, pochote (Ceiba parvifolia) roots, maguey (Agave spp.) leaves, and meat. In the Coxcatlan phase (7,000-5,500 years BP), stem tissue and fruits of "Opuntia" and "Lemaireocereus" were equally dominant materials. In the Abejas (5,500-3,300 years BP), Ajalpan (3,500-2,900 years BP), Santa Maria (2,900-2,200 years BP), Palo Blanco (2,200-1,300 years BP), and Venta Salada (1,300-460 years BP) phases, findings suggest that consumption of "Lemaireocereus" stem tissue, fruits, and seeds were more important than products of "Opuntia"; and during the Ajalpan and Santa Maria phases, "Lemaireocereus" was the principal plant constituent of human diets.

The importance of cacti in Mesoamerican cultures can be recognized in pre-Columbian codices, which contain many toponymic glyphs referring to the names of cacti or their parts. Among the most famous are Tenochtitlan ("place of stony prickly pears" in Nahuatl), the original name of Mexico City, and Nochistlan ("place of prickly pears" in Nahuatl), in the state of Oaxaca. Historical information on utilization of cacti can be found in La Historia General y Natural de las Indias, published by Oviedo y Valdés in 1535. The Barberini Codex from 1552 (De la Cruz and Badiano 1964) includes information on medicinal utilization of Tlatocnochtli, a species of Opuntia, and a description of Teonochtli, identified as Stenocereus sp. by Bravo-Hollis (1978). The Florentino Codex (Sahagún 1970) contains a section dedicated to the description of the "diversity of tunas," which includes a list of variants of Opuntia species and their uses as edible fruits and stems. Estrada (1989) identified Cacanochnopalli (a Nahuatl term) as O. megarhiza, Tecolnochnopalli as O. streptacantha, Uitzocuitlapalli as Aporocactus flagelliformis, Nopalxochitl as Epiphyllum ackermanii, Teonochtli as Hylocereus undatus, Peyotl as Lophophora williamsii (now commonly known as "peyote"), as well as several types of Tecomitl as Mammillaria, Echinocactus, and Ferocactus species. The Florentino Codex also includes information on two columnar cacti, one of them called Netzolli, which is probably Escontria chiotilla, and Teunochtli, which could be a species of Stenocereus (Casas et al. 1999a). The books of Francisco Hernandez in the 16th century describe several species of cacti utilized as medicine, among them several species of Opuntia, two columnar cacti identified as Myrtillocactus Geometrizans, and a possible Stenocereus species called Teonochtli (Hernandez 1959). The Geographic Relations of the XVI Century described the cultivation of Opuntia species for the production of cochineal and contains a reference to the columnar cactus Teonochtli, the "Relation of Acatlan" (Acuña 1985). Based on these sources, cacti were clearly utilized as food (fruits, young stems, and in some cases the flowers and seeds) and medicine (fruits, stems, and roots).

In the 16th century, Oviedo y Valdes (1535) and Sahagún (1985) described how the harvest of fruits of Opuntia spp. and columnar cacti was crucial for subsistence of some pre-Columbian and post-Conquest peoples from northern and central Mexico. For example, indigenous people migrated during the summer from the coast of the Gulf of Mexico to the highlands of the northern plateau, looking for the fruits of platyopuntias. In this region, people stayed for two months, migrating from place to place consuming fruits.

Smith (1967) considered that species of Opuntia could have been among the first plants subject to human manipulation in the Tehuacan Valley, but no archaeological evidence exists. Apparently, Opuntia was cultivated in the 16th century for the production of cochineal (Opuntia ficus-indica, O. tomentosa var.


Excerpted from CACTI Copyright © 2002 by Regents of the University of California. Excerpted by permission.
All rights reserved. No part of this excerpt may be reproduced or reprinted without permission in writing from the publisher.
Excerpts are provided by Dial-A-Book Inc. solely for the personal use of visitors to this web site.

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Table of Contents

List of Contributors

1. Evolution and Systematics
Robert S. Wallace and Arthur C. Gibson
2. Shoot Anatomy and Morphology
Teresa Terrazas Salgado and James D. Mauseth
3. Root Structure and Function
Joseph G. Dubrovsky and Gretchen B. North
4. Environmental Biology
Park S. Nobel and Edward G. Bobich
5. Reproductive Biology
Eulogio Pimienta-Barrios and Rafael F. del Castillo
6. Population and Community Ecology
Alfonso Valiente Banuet and Héctor Godínez-Alvarez
7. Consumption of Platyopuntias by Wild Vertebrates
Eric Mellink and Mónica E. Riojas-López
8. Biodiversity and Conservation
Thomas H. Boyle and Edward F. Anderson
9. Mesoamerican Domestication and Diffusion
Alejandro Casas and Giuseppe Barbera
10.Cactus Pear Fruit Production
Inglese, Filadelfio Basile, and Mario Schirra
11. Fruits of Vine and Columnar Cacti
Avinoam Nerd, Noemi Tel-Zur, and Yosef Mizrahi
12. Forage, Fodder, and Animal Nutrition
Ali Nefzaoui and Hichem Ben Salem
13. Nopalitos, Mucilage, Fiber, and Cochineal
Carmen Sáenz-Hernández, Joel Corrales-Garcia, and Gildardo Aquino-Pérez
Insect Pests and Diseases
Helmuth G. Zimmermann and Giovanni Granata
15. Cactus Breeding and Biotechnology
Brad Chapman, Candelario Mondragon Jacobo, Ronald A. Bunch, and Andrew H. Paterson


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