Open Access. Powered by Scholars. Published by Universities.®
- Keyword
-
- Mexico (2)
- Aguascalientes (1)
- Asteraceae (1)
- Canacomyrica (1)
- China (1)
-
- Chloridoideae (1)
- Chromosome number (1)
- Dedeckera (1)
- Discovery (1)
- Ecological wood anatomy (1)
- Epiparasitism (1)
- Equisetum (1)
- Eurosids (1)
- Fagales (1)
- Fecundity (1)
- Ferns (1)
- Genetic load (1)
- Gramineae (1)
- Lsoëtes (1)
- Lycurus (1)
- Madiinae (1)
- Metasequoia giyptostroboides (1)
- Morella (1)
- New species (1)
- Parasitic plants (1)
- Phoradendron (1)
- Pteridophytes (1)
- Reproductive capacity (1)
- San Luis Potosí (1)
- Schaffnerella (1)
Articles 1 - 8 of 8
Full-Text Articles in Life Sciences
Genetic Control Of Self-Incompatibility In Centromadia (Hemizonia) Pungens Subsp. Laevis (Madiinae, Asteraceae), Elizabeth A. Friar, Tasha Ladoux
Genetic Control Of Self-Incompatibility In Centromadia (Hemizonia) Pungens Subsp. Laevis (Madiinae, Asteraceae), Elizabeth A. Friar, Tasha Ladoux
Aliso: A Journal of Systematic and Floristic Botany
The presence of self-incompatibility was tested in Centromadia pun gens subsp. laevis and the genetic basis of the self-incompatibility response was explored using crossing studies. We performed full diallel crossing experiments among 10 individuals from one natural population and four F1 families. We observed a strong self-incompatibility response in all individuals tested, with a significant difference in seed set between selfed and outcrossed matings. Most pairwise matings among parental plants were compatible, with some nonreciprocally incompatible matings (i.e., the matings were successful in one direction, but not the other), and only one reciprocally incompatible mating. The full diallel crossing …
The Chromosome Number Of Schaffnerella Gracilis (Gramineae, Chloridoideae), J. Travis Columbus, Nancy F. Refulio-Rodriguez
The Chromosome Number Of Schaffnerella Gracilis (Gramineae, Chloridoideae), J. Travis Columbus, Nancy F. Refulio-Rodriguez
Aliso: A Journal of Systematic and Floristic Botany
The first ever chromosome report for the monotypic genus Schaffnerella (Grarnineae, Chloridoideae) is 2n = 20 (10 II) from pollen parent cells at diakinesis, which indicates diploidy and a base number of 10. The close relative Lycurus likewise has x = 10, but is tetraploid (2n = 4x = 40).
Contents 21(2)
Aliso: A Journal of Systematic and Floristic Botany
No abstract provided.
Checklist Of The Pteridophytes Of Aguascalientes, Mexico, María Elena Siqueiros-Delgado, Gabriel González-Adame
Checklist Of The Pteridophytes Of Aguascalientes, Mexico, María Elena Siqueiros-Delgado, Gabriel González-Adame
Aliso: A Journal of Systematic and Floristic Botany
Ferns and fern allies from Agu ascalientes, Mexico were s tudied. Fifty-five localities distributed in all municipios of the state were surveyed. Seventy-seven taxa were found: seventy species of ferns, five species of Selaginell, one species of Equisetum, and one species of Isoëtes. Forty taxa are new records for Aguascalientes. Among the ferns, Cheilanthes and Polypodium are the most diverse and abundant genera, usually occurring in xerophytic associations or dry forests. Selaginella is also common in Aguascalientes, and inhabits rocky cliffs in dry environments. Equisetum and lsoëtes are restricted to marshy places.
Developmental Failure And Loss Of Reproductive Capacity As A Factor In Extinction: A Nine-Year Study Of Dedeckera Eurekensis (Polygonaceae), Delbert Wiens, Loreen Allphin, Donald H. Mansfield, Glenn Thackray
Developmental Failure And Loss Of Reproductive Capacity As A Factor In Extinction: A Nine-Year Study Of Dedeckera Eurekensis (Polygonaceae), Delbert Wiens, Loreen Allphin, Donald H. Mansfield, Glenn Thackray
Aliso: A Journal of Systematic and Floristic Botany
Many long-lived perennial species exhibit lowered reproductive capacity. Early studies of reproductive success in Dedeckera eurekensis (Polygonaceae) demonstrated that the species exhibited extremely low reproductive success, low seed/ovule (S/O) ratios (i.e., the percentage of ovules that produce filled seeds; 2.5 %), low germinability of filled seeds (3.5%), low seedling survivorship (11 .1%), and lack of recruitment in natural populations. These results were attributed to genetic load, but this elicited controversy, prompting long-term studies of the relationship between the S/O ratio and environment. After nine years of monitoring, however, the S/O ratio had not changed significantly (2 .7%), and there was …
The History Of The Discovery And Initial Seed Dissemination Of Metasequoia Glyptostroboides, A "Living Fossil", Jinshuang Ma
The History Of The Discovery And Initial Seed Dissemination Of Metasequoia Glyptostroboides, A "Living Fossil", Jinshuang Ma
Aliso: A Journal of Systematic and Floristic Botany
Ever since the "living fossil ", Metasequoia glyptostroboides, was discovered during the 1940s in China, accounts of its mysterious discovery and introduction throughout the world have been told many times in different languages. However, information has often departed considerably from the true story. This paper represents a synthesis of more than 1000 original letters, manuscripts and publications both in Chinese and other languages, and addresses two main questions about details of the story: (1) how was the living fossil really discovered , and (2) who introduced the seeds into the U.S.A. and the rest of the world? Several controversies surrounding …
Wood And Bark Anatomy Of Myricaceae: Relationships, Generic Definitions, And Ecological Interpretations, Sherwin Carlquist
Wood And Bark Anatomy Of Myricaceae: Relationships, Generic Definitions, And Ecological Interpretations, Sherwin Carlquist
Aliso: A Journal of Systematic and Floristic Botany
Wood anatomy of the single species of Canacomyrica (hitherto not studied) shows that it belongs in Myricaceae, although it differs from other genera in several respects (axial parenchyma grouped in bands or columns as well as diffuse; Heterogeneous Type I rays; more numerous bars per perforation plate). The latter two features are primitive for the family. The four genera (Canacomyrica. Comptonia, Morella, and Myrica s.s.) differ from each other not only by qualitative features but by quantitative features (feature means in genera mostly non- overl apping). Wood of Comptonia and Myri ca s.s. lacks chambered crystals in axial parenchyma and …
New Species Of Phoradendron (Viscaceae) From Mexico And Guatemala And A Synopsis Of Species In Section Pauciflorae, Delbert Wiens, Frank Hawksworth
New Species Of Phoradendron (Viscaceae) From Mexico And Guatemala And A Synopsis Of Species In Section Pauciflorae, Delbert Wiens, Frank Hawksworth
Aliso: A Journal of Systematic and Floristic Botany
As presently interpreted Phoradendron section Paucifiorae consists of 15 species. These mistletoes parasitize primarily conifers. We describe seven new species, make status changes for four species, and provide information on the hosts and distribution of all members of the section. New species described are: Phoradendron abietinurn Wiens, on Abies durangensi s in Chihuahua, Durango, and Jalisco, Mexico; P. acuminatum Wiens, on Cupressus lusitanica in Guatemala; P. flavomarginatum Wiens, on Juniperus fiaccida in Nuevo León, Mexico; P. lta wksworthii Wiens, on Juniperus in New Mexico, west Texas, and Coahuila, Mexico; P. olivae Wiens, on Cupressus lusitanica in Colima and Jalisco, Mexico; …