Ontogenetic Contingency and Floral Morphology: The Effects of Architecture and Resource Limitation

1997 ◽  
Vol 158 (S6) ◽  
pp. S99-S107 ◽  
Author(s):  
Pamela K. Diggle
Keyword(s):  
Floral Morphology ◽  
Resource Limitation ◽  
Ontogenetic Contingency

scholarly journals A primary study of breeding system of Ziziphus jujuba var. spinosa

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Feng Wang ◽  
Xiaohan Sun ◽  
Jibin Dong ◽  
Rong Cui ◽  
Xiao Liu ◽  
...  
Keyword(s):  
Breeding System ◽  
Soil Conservation ◽  
Water Retention ◽  
Pollen Limitation ◽  
Floral Morphology ◽  
Resource Limitation ◽  
Chemical Components ◽  
Primary Study ◽  
Fruit Setting ◽  
Ziziphus Jujuba

AbstractZiziphus jujuba var. spinosa has been used as a windbreak and for soil conservation and water retention. Previous studies focused on pharmacological effects and extraction of chemical components in this species, and very few explored the breeding system. The present study combined the analysis of floral morphology, behavior of flower visitors, and artificial pollination to reveal reproductive characteristics of the species. Its flowers are characterized by dichogamy, herkogamy, and stamen movement, which are evolutionary adaptations to its breeding system. There were more than 40 species of visiting insects, mainly Hymenoptera and Diptera, and the characteristics of dichogamous and herkogamous flower adapted to the visiting insects. The breeding system is outcrossing, partially self-compatible, and demand for pollinators. The fruit setting rate after natural pollination was 2%. Geitonogamy and xenogamy did not significantly increase the fruit setting rate, indicating that the low fruit setting rate was not due to pollen limitation by likely caused by resource limitation or fruit consumption. The fruit setting rate of zero in emasculated and in naturally and hand self-pollinated individuals suggested the absence of apomixis and spontaneous self-pollination. The above results can be utilized in studies on evolution and cultivation of Z. jujuba var. spinosa.

Floral morphology of certain species of the Papilionaceae with a special reference to stamen adelphy

Taeckholmia ◽  
2001 ◽  
Vol 21 (1) ◽  
pp. 153-172 ◽  
Author(s):  
Abd El-Salam Al- Nowaihi ◽  
Karima Hamed ◽  
Magdy Mourad
Keyword(s):  
Special Reference ◽  
Floral Morphology

Floral morphology and pollen viability of an endangered and endemic Bromeliaceae species from the Atlantic Forest

Grana ◽  
2021 ◽  
pp. 1-20
Author(s):  
Valéria Leobina dos Santos ◽  
Catarina Carvalho Nievola ◽  
Adriana de Oliveira Fidalgo ◽  
Shoey Kanashiro ◽  
Maria das Graças Lapa Wanderley ◽  
...  
Keyword(s):  
Atlantic Forest ◽  
Floral Morphology ◽  
Pollen Viability

Floral Morphology ofApuleia leiocarpa(Dialiinae: Leguminosae), an Unusual Andromonoecious Legume

2013 ◽  
Vol 174 (2) ◽  
pp. 154-160 ◽  
Author(s):  
Erin Zimmerman ◽  
Gerhard Prenner ◽  
Anne Bruneau
Keyword(s):  
Floral Morphology

Quantitative Trait Loci Affecting Differences in Floral Morphology Between Two Species of Monkeyflower (Mimulus)

Genetics ◽  
1998 ◽  
Vol 149 (1) ◽  
pp. 367-382 ◽  
Author(s):  
H D Bradshaw ◽  
Kevin G Otto ◽  
Barbara E Frewen ◽  
John K McKay ◽  
Douglas W Schemske
Keyword(s):  
Quantitative Trait Loci ◽  
Reproductive Isolation ◽  
Quantitative Trait ◽  
Floral Morphology ◽  
Cumulative Effect ◽  
Sympatric Species ◽  
Accurate Estimate ◽  
Phenotypic Variance ◽  
Trait Loci ◽  
Morphological Differences

Abstract Conspicuous differences in floral morphology are partly responsible for reproductive isolation between two sympatric species of monkeyflower because of their effect on visitation of the flowers by different pollinators. Mimulus lewisii flowers are visited primarily by bumblebees, whereas M. cardinalis flowers are visited mostly by hummingbirds. The genetic control of 12 morphological differences between the flowers of M. lewisii and M. cardinalis was explored in a large linkage mapping population of F2 plants (n = 465) to provide an accurate estimate of the number and magnitude of effect of quantitative trait loci (QTLs) governing each character. Between one and six QTLs were identified for each trait. Most (9/12) traits appear to be controlled in part by at least one major QTL explaining ≥25% of the total phenotypic variance. This implies that either single genes of individually large effect or linked clusters of genes with a large cumulative effect can play a role in the evolution of reproductive isolation and speciation.

Mass-Casualty Training Exercise Using High-Fidelity Computerized Simulators and Involving Time and Resource Limitation

2021 ◽  
Vol 36 (3) ◽  
pp. 313-320
Author(s):  
Phillip A. Jacobson ◽  
Paul N. Severin ◽  
Dino P. Rumoro ◽  
Shital Shah
Keyword(s):  
Health Care ◽  
Resource Limitation ◽  
Mass Casualty ◽  
Health Care Personnel ◽  
High Fidelity ◽  
Medical Team ◽  
Training Exercise ◽  
The Mean ◽  
Medical Teams

AbstractPurpose:Training emergency department (ED) personnel in the care of victims of mass-casualty incidents (MCIs) is a highly challenging task requiring unique and innovative approaches. The purpose of this study was to retrospectively explore the value of high-fidelity simulators in an exercise that incorporates time and resource limitation as an optimal method of training health care personnel in mass-casualty care.Methods:Mass-casualty injury patterns from an explosive blast event were simulated for 12 victims using high-fidelity computerized simulators (HFCS). Programmed outcomes, based on the nature of injuries and conduct of participants, ranged from successful resuscitation and survival to death. The training exercise was conducted five times with different teams of health care personnel (n = 42). The exercise involved limited time and resources such as blood, ventilators, and imaging capability. Medical team performance was observed and recorded. Following the exercise, participants completed a survey regarding their training satisfaction, quality of the exercise, and their prior experiences with MCI simulations. The Likert scale responses from the survey were evaluated using mean with 95% confidence interval, as well as median and inter-quartile range. For the categorical responses, the frequency, proportions, and associated 95% confidence interval were calculated.Results:The mean rating on the quality of experiences related trainee survey questions (n = 42) was between 4.1 and 4.6 on a scale of 5.0. The mean ratings on a scale of 10.0 for quality, usefulness, and pertinence of the program were 9.2, 9.5, and 9.5, respectfully. One hundred percent of respondents believed that this type of exercise should be required for MCI training and would recommend this exercise to colleagues. The five medical team (n = 5) performances resulted in the number of deaths ranging from two (including the expectant victims) to six. Eighty percent of medical teams attempted to resuscitate the “expectant” infant and exhausted the O- blood supply. Sixty percent of medical teams depleted the supply of ventilators. Forty percent of medical teams treated “delayed” victims too early.Conclusion:A training exercise using HFCS for mass casualties and employing limited time and resources is described. This exercise is a preferred method of training among participating health care personnel.

Sign in / Sign up

Export Citation Format

Share Document