Results 31 to 40 of about 20,542 (248)

Ecological implications of reduced pollen deposition in alpine plants: a case study using a dominant cushion plant species [v1; ref status: indexed, http://f1000r.es/3mb]

F1000Research, 2014
The reproductive assurance hypothesis states that self-incompatible female plants must produce twice the number of seeds relative to their self-compatible hermaphroditic counterparts to persist in gynodioecious populations.
Anya Reid, Robyn Hooper, Olivia Molenda, Christopher J. Lortie   +3 more
doaj   +1 more source

Aging Regulated Through a Stability Model of Insulin/Insulin Growth Factor Receptor Function

Frontiers in Endocrinology, 2021
Mutations of the insulin-like receptor in Drosophila extend lifespan. New research suggests this receptor operates in two modes. The first extends lifespan while slowing reproduction and reducing growth.
Marc Tatar
doaj   +1 more source

Bees may drive the reproduction of four sympatric cacti in a vanishing coastal mediterranean-type ecosystem [PDF]

PeerJ, 2019
Background Sympatric congeneric plants might share pollinators, or each species might avoid competition by evolving specialized traits that generate partitions in pollinator assemblages.
Pablo C. Guerrero, Claudia A. Antinao, Beatriz Vergara-Meriño, Cristian A. Villagra, Gastón O. Carvallo   +4 more
doaj   +2 more sources

High lability of sexual system over 250 million years of evolution in morphologically conservative tadpole shrimps

BMC Evolutionary Biology, 2013
Background Sexual system is a key factor affecting the genetic diversity, population structure, genome structure and the evolutionary potential of species.
Mathers Thomas C, Hammond Robert L, Jenner Ronald A, Zierold Thorid, Hänfling Bernd, Gómez Africa   +5 more
doaj   +1 more source

Dactyliform appendage contributes to delayed selfing in the diminutive orchid Stigmatodactylus sikokianus

Plants, People, Planet
Societal Impact Statement Understanding plant reproductive strategies is vital for conserving endangered species. This study reveals a novel self‐pollination mechanism in the diminutive orchid Stigmatodactylus sikokianus, facilitated by the movement of a
Kenji Suetsugu
doaj   +1 more source

Pollinator availability, mating system and variation in flower morphology in a tropical savanna tree

Acta Botânica Brasílica
Widely distributed organisms face different ecological scenarios throughout their range, which can potentially lead to micro-evolutionary differentiation at specific localities.
André Rodrigo Rech, Leonardo Ré Jorge, Jeff Ollerton, Marlies Sazima   +3 more
doaj   +1 more source

Why Self-fertilizing Plants Still Exist in Wild Populations: Diversity Assurance through Stress-Induced Male Sterility May Promote Selective Outcrossing and Recombination

Agronomy, 2020
Climate change creates challenges for wild species, but plants have survived and adapted to similar changes in their evolutionary past. Most plants were originally outcrossing, one theoretical genetic reason being that self-fertilization does not create ...
Maarten van Ginkel, Ronald C. H. Flipphi   +1 more
doaj   +1 more source

Guidelines for Pediatric Radiotherapy Simulation: A Report From the Children's Oncology Group Radiation Oncology Discipline

Pediatric Blood &Cancer, EarlyView.
ABSTRACT Pediatric radiation therapy presents unique challenges compared to adult treatments, including those of immobilization, potential need for sedation, and the critical importance of accurate, reproducible positioning. Additionally, heightened attention to imaging doses is necessary to minimize long‐term toxicity in survivors.
Parham Alaei, Stephen Mihalcik, Sujith Baliga, Young Kwok, Dana Casey, Eric Ehler, Christiane Burton, John C. Breneman, Daphne A. Haas‐Kogan, Suzanne L. Wolden, Arnold C. Paulino, Nadia N. Laack, Natia Esiashvili, Sarah Milgrom, Christine Hill‐Kayser, Thomas J. Fitzgerald, John A. Kalapurakal, Chia‐Ho Hua   +17 more
wiley   +1 more source

Quality of maternal and child health services in Tanzanian primary healthcare: a 2021–2022 star rating review

Reproductive Health
Background Tanzania faces high maternal and infant mortality rates, yet key service quality metrics remain underexamined, limiting targeted improvements. Star Rating Assessment (SRA), introduced in 2015, aims to improve primary health care (PHC) quality,
Erick S. Kinyenje, Martin M. Degeh, Joseph C. Hokororo, Syabo M. Mwaisengela, Ruth R. Ngowi, Omary A. Nassoro, Chrisogone J. German, Radenta P. Bahegwa, Yohanes S. Msigwa, Atuganile Musyani, Laura E. Marandu, Michael Habtu, Jennifer T. Mbise, Habibu Ismail, Janeth Masuma, Faraja Msemwa, Joanita Muruve, Saturini Manangwa, Daudi Msasi, Jimmy Mbelwa, Athman Pembe, Ahmad M. Makuwani, Ntuli A. Kapologwe, Tumaini J. Nagu, Eliudi S. Eliakimu   +24 more
doaj   +1 more source

Pollinator-mediated self-pollination and reproductive assurance in an isolated tree of Magnolia grandiflora L.

Ecological Processes, 2020
Background The ability to produce seeds when pollinators or potential mates are scarce is one of the principal advantages of self-pollination in flowering plants.
Arun Sukumaran, Vinod Prasad Khanduri, Chandra Mohan Sharma   +2 more
doaj   +1 more source