Results 101 to 110 of about 306 (134)
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Wood biomechanics and anatomy of PACHYCEREUS PRINGLEI
American Journal of Botany, 2000We report the longitudinal, biomechanical, and anatomical trends observed for tissue samples drawn from the parallel aligned, prismatic woody vascular bundles running the length of a Pachycereus pringlei plant measuring 5.22 m in height. The main vertical stem of this plant was cut into five segments (labeled A through E in the acropetal direction ...
K J, Niklas +3 more
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The biomechanics of Pachycereus pringlei root systems
American Journal of Botany, 2002We report on the root system of the large columnar cactus species Pachycereus pringlei to explore the hypothesis that increasing plant size decreases the ability to resist wind‐throw but increases the capacity to absorb and store nutrients in roots (i.e., plant size limits the performance of these functions and may shift the performance of one function
Karl J, Niklas +3 more
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Seed morphology and variation in the genus Pachycereus (Cactaceae)
Journal of Plant Research, 2004Seeds of 13 Pachycereus species and two Stenocereus species that have been suggested as closely related were examined with the scanning electron microscope. Quantitative features were evaluated using multivariate analysis in order to identify characters that distinguish them.
Salvador, Arias, Teresa, Terrazas
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Taxonomic Revision of Pachycereus (Cactaceae)
Systematic Botany, 2009A comprehensive taxonomic revision of the genus Pachycereus (Cactaceae, Cactoideae, Pachycereeae) is presented. Pachycereus is characterized by one synapomorphic character, the presence of a narrow interareolar groove, and by the combination of flowering region differentiated with flexible spines, flower with a narrow region between the pericarpel and
Salvador Arias, Teresa Terrazas
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Phytoparasitica, 2021
This study was conducted to elucidate the identification of Moneilema variolare Thomson, 1867, as a new pest to Pachycereus marginatus (DC.) Britton & Rose. Behavior, identification, and damages were investigated for 3 years. Adults emerged from pupal chamber in late winter, and fed on Pachycereus stems.
Andrés Quezada-Salinas +7 more
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This study was conducted to elucidate the identification of Moneilema variolare Thomson, 1867, as a new pest to Pachycereus marginatus (DC.) Britton & Rose. Behavior, identification, and damages were investigated for 3 years. Adults emerged from pupal chamber in late winter, and fed on Pachycereus stems.
Andrés Quezada-Salinas +7 more
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Flower orientation in Pachycereus pringlei
Canadian Journal of Botany, 2000The orientation of flowers in columnar cacti has been a subject of great interest to plant biologists. The interpretation of this pattern has invoked warmer temperatures as the underlying factor. In this paper, we describe flower orientation in two populations of Pachycereus pringlei (S.
Clara Tinoco-Ojanguren +1 more
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Tetrahydroisoquinoline alkaloids of the Mexican columnar cactus Pachycereus Weberi
Phytochemistry, 1980Abstract Eight tetrahydroisoquinoline alkaloids have been crystallized and identified from the nonphenolic and phenolic extracts of the giant Mexican cereoid cactus, Pachycereus weberi (Coult.) Br. and R. The identities were established as 5,6,7-trimethoxy-1,2,3,4- tetrahydroisoquinoline (nortehuanine) 1; 7,8-dimethoxy-1,2,3,4-tetrahydroisoquinoline (
Rachel Mata, Jerry L. MeLaughlin
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Seedling performance in a trioecious cactus,Pachycereus pringlei: Effects of maternity and paternity
Plant Systematics and Evolution, 1999We studied seed germination and the growth and survivorship of seedlings of females and hermaphrodites ofPachycereus pringlei (cardon), a Mexican columnar cactus whose geographically variable breeding system includes trioecy and gynodioecy. Results of a two-year field experiment conducted near Bahia Kino, Sonora, Mexico and a ten-month laboratory ...
Vinicio J. Sosa, Theodore H. Fleming
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Pollination biology of the columnar cactus Pachycereus pecten-aboriginum in north-western México
Journal of Arid Environments, 2004Columnar cacti in tropical deserts depend on nectar-feeding bats for their reproduction while species from extra-tropical deserts show a relatively generalized pollination system with both nocturnal and diurnal pollinators. Pachycereus pecten-aboriginum is a columnar cactus with a broad distribution along the Pacific coast of Mexico, from Oaxaca to ...
Francisco Molina-Freaner +3 more
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Perspectives in Plant Ecology, Evolution and Systematics, 2016
Abstract Mating systems and long-term climatic fluctuations have large impact on genetic diversity and population structure of plants; however, the genetic consequences have been poorly documented in species with geographic variation in mating systems. Here we used genetic variation from microsatellite markers to investigate the biogeographic pattern
Carina Gutiérrez-Flores +3 more
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Abstract Mating systems and long-term climatic fluctuations have large impact on genetic diversity and population structure of plants; however, the genetic consequences have been poorly documented in species with geographic variation in mating systems. Here we used genetic variation from microsatellite markers to investigate the biogeographic pattern
Carina Gutiérrez-Flores +3 more
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