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Fertilization in Biological News

Symposium to discuss geoengineering to fight climate change at the ESA Annual Meeting

... Miller of Oregon State University says that ocean fertilization could create a rise in iron-limited phytoplankton ... he says, the maximum possible rate of ocean iron fertilization could only offset a small fraction of the current rate of carbon burning by humans. Ocean fertilization also does not alleviate the increasing problem of ...

Lohafex provides new insights on plankton ecology

... other countries. They carried out an ocean iron fertilization experiment in the south-western Atlantic for ... dissolved iron. They followed the effects of the fertilization on the plankton continuously for 39 days. ... bloom was minor compared to earlier ocean iron fertilization experiments. The larger blooms stimulated by ...

LOHAFEX: An Indo-German iron fertilization experiment

... on 7th January to carry out the Indo-German iron fertilization experiment LOHAFEX (LOHA is Hindi for iron, FEX stands for fertilization EXperiment). About two weeks will be required to ... to classify the potential role of ocean fertilization as a means of reducing carbon dioxide ...

Attitudes towards assisted reproduction and preimplantation genetic diagnosis

... reproduction techniques in general and in vitro fertilization in particular as firmly acceptable alternatives ... However, this strong approval for in vitro fertilization dissipates in other scenarios such as using the ... out on the embryos obtained from artificial fertilization in order to select those to be implanted in the ...

Bitter-tasting nectar and floral odors optimize outcrossing for plants

... the researchers to measure only animal-mediated fertilization success rates, because self-pollination was ... during the growing season, the male fertilization success switched from the attractant (benzyl ... in the nectar on successful pollinator-mediated fertilization of tobacco plants decreased continuously, whereas ...

More acidic ocean could spell trouble for marine life's earliest stages

... predicted by the year 2100 could slash the fertilization success of sea urchins by an estimated 25 ... simple: we observed a 25 percent reduction in fertilization success at reduced pH, which is equivalent to a ... leading to a 25 percent reduction in their fertilization success. " We need to begin to respond ...

W.M. Keck Foundation grant funds reproductive science research

... and biological signaling events surrounding fertilization and early embryonic development. The egg and sperm unite at the time of fertilization and create a new cell called the zygote. This ... but little is known about these networks in fertilization and early embryonic development. A better ...

American Chemical Society's Weekly PressPac -- March 26, 2008

... A. Petkewich explains that in theory, ocean fertilization would remove carbon dioxide from the atmosphere ... CO 2 for growth. First proposed years ago, ocean fertilization has taken on new dimensions now that hundreds of ... services, Petkewich says. Although fertilization can stimulate the growth of plankton and draw ...

Will intensive forest practices impact water quality?

... become more intense in recent decades. Forest fertilization increased by 800% in the southeastern United ... on small watersheds but not on the large one. fertilization resulted in increased losses of nitrogen and ... losses of nitrogen, indicating that even after fertilization at a rate almost 30 times greater than rainfall ...

Biologists find unusual plant gene: abstinence by mutual consent

... have discovered a gene in plants that disrupts fertilization only when mutations in the gene are present in ... properties. Mutations that do not allow fertilization are known in plants, but usually these mutations ... female carries the mutation, completely normal fertilization occurs, and when only the male carries the ...

New research discredits $100B global warming 'fix'

... of Geophysical Research, suggests that ocean fertilization may not be an effective method of reducing carbon ... in a way to minimize loss, said Lutz. Ocean fertilization schemes, which resemble an artificial summer, may ... This study closely follows a September Ocean Iron fertilization symposium at the Woods Hole Oceanographic ...

New evidence for female control in reproduction

... choice has profound implications for in-vitro fertilization (IVF), cloning, and animal breeding. It is also a ... to prepare oviduct environment for storing sperm, fertilization and early embryonic development, Fazeli said. ... as well as cloning. Both techniques rely on egg fertilization outside of their finely-tuned reproductive ...

In-vitro fertilization improved with 3-D/4-D-guided embryo transfer and new placement target

... pregnancy rate for patients undergoing in-vitro fertilization (IVF) is improved when doctors use advanced 3D/4D ... the number of embryos transferred during in-vitro fertilization to just a single embryo in order to reduce the ... a mean age of 38.3 years who received in-vitro fertilization using 3D/4D-guided embryo transfer at the ...

Scientists, policymakers and industry leaders gather to discuss ocean iron fertilization

... interdisciplinary conference on the proposed iron fertilization of the ocean as a means to combat rising ... economic, and political framework before iron fertilization can be considered either effective or ... Department and a participant in two iron fertilization experiments at sea. The time is right to bring ...

UC Davis begins $2.8 million in studies of agricultural nitrogen's impacts

... as weather conditions, irrigation timing and method, and crop-specific fertilization practices. The new studies should improve data-collection methods, said ... oxide and other greenhouse gases are released during irrigation and fertilization of farm lands in California," Six said. "The good news is we know that it ...

Fertilization intensifies competition for light and endangers plant diversity

... grasslands. This additional light countered the negative effects of fertilization and prevented the loss of plant diversity. Counter to earlier beliefs, ... for light is the main mechanism of plant biodiversity loss after fertilization says Yann Hautier summarizing the results of his PhD work. The addition of ...

Ocean islands fuel productivity and carbon sequestration through natural iron fertilization

... the Woods Hole Oceanographic Institution (WHOI), found that natural iron fertilization enhanced the export of carbon to the deep ocean. The research was ... fertilizing the ocean with iron. The team showed that this natural iron fertilization enhanced phytoplankton growth and productivity and the amount of carbon ...

Female plant 'communicates' rejection or acceptance of male

... genetically-modified crops to wild relatives, offer better ways to control fertilization between cross species, and lead to a more efficient way of growing fruit ... directly influence the growth of pollen down the pistil to the ovary where fertilization takes place. Three proteins, S-RNase-binding protein (SBP1), the ...

Amazon powers tropical ocean's carbon sink

... instead may be more feasible in the warm oceans. Capone said that iron fertilization would increase diazotroph activity and that the stratified tropical waters ... that probably would get a lot more bang for the buck in terms of iron fertilization than we would at high latitudes." ...

Healthy parents provide clues to survival of young haddock on Georges Bank

... but that the adults will produce more eggs of higher quality with higher fertilization rates. Those factors in turn will produce more abundant, larger and ... suggest a new paradigm, that the condition of parents affects egg size and fertilization success through the most difficult growth-mortality period early in the ...

Atmosphere threatened by pollutants entering ocean, prof says

... to restore the balance, Duce explained. Thus, the human-caused nitrogen fertilization of the ocean removes some of the most important greenhouse gas carbon ... compound, nitrous oxide, that also forms in the ocean due to the nitrogen fertilization and is re-emitted into the atmosphere as a powerful greenhouse gas, he ...

Is it organic or not?

... the proper interval of 15N-values to exclude non-organic fertilization practices for certification policies. 15N abundance in the atmosphere, ... and (iii) independently of the organic manure used, no additional fertilization (synthetic or organic) was required before 106 days after transplanting ...

Oosight microscope enables embryonic stem cell breakthrough

... clinical settings to evaluate the quality of human eggs prior to in vitro fertilization procedures, and thus reduce the number of nonviable embryos created; and ... it was David Keefes vision that the LC-PolScope could be used for in vitro fertilization or for enucleation, since it can be used to visualize the spindle without ...

Study reveals that nitrogen fertilizers deplete soil organic carbon

... Tim Ellsworth, and Charlie Boast. Their paper "The Myth of Nitrogen fertilization for Soil Carbon Sequestration" is published in the November/December 2007 ... identify changes that have occurred since the onset of synthetic nitrogen fertilization in 1955. "What we learned is that after five decades of massive inputs of ...

Is this the beginning of the end of plant breeding?

... ssible to reproduce a plant that produces perfect potatoes, maize or rice, without the lottery of reassortment that each meiotic division and ensuing fertilization introduces. The first steps of both meiosis and mitosis are the replication of the dividing cell's DNA. Once replication has occurred, the ...

ChloroFilms announces video contest winners

... , a collaboration with Anna Edlund, combines music, dance, sensual imagery and puns to tell the story of pollination and fertilization in plants in an unforgetable way. More from this creative team is available at http://www.lelavision.com/ . First prizes ($500 cash awards) ...

Crop models help increase yield per unit of water used

... managers need from these models in order to develop useful management alternatives for crop selection and timing, tillage systems, and irrigation and fertilization practices. Development of AquaCrop and several other models is continuing and will be guided by the findings of these studies. ...

April 2009 Geology and GSA Today media highlights

... volcanism beginning in the late Eocene, about 34 million years ago, which likely led to the production of sulfur aerosols in the stratosphere and fertilization of surface waters of the Pacific Ocean. The findings suggest that abundant arc volcanism may be partly responsible for the climatic preconditioning ...

Flight of the bumble (and honey) bee

... of flowers in the same row of plants. The bees' flight paths have a direct affect on their ability to hunt for pollen and generate "gene flow", fertilization and seed production that results when pollen moves from one plant to another. The study of gene flow has experienced more attention in part due to ...

Mating that causes injuries

... multiple males. "We also show that males with long barbs cause more severe injuries to females, but also that these males have a greater rate of fertilization success," says Gran Arnqvist. The barbs are thus extremely important to males in their competition to be able to fertilize an egg. When females ...

The more promiscuous the female, the speedier the sperm

... will compete in the race to procreate, explains Balshine. While the idea that sperm would evolve to become more competitive when males compete for fertilization seems obvious, to date there has been little evidence to support this theory. For the study, researchers collected males from 29 closely related ...

Bacterial biofilms as fossil makers

... are quickly colonized by marine bacteria. Once inside, the bacteria form biofilms that fill the embryo cells. Sturdy cell membranes and the embryo's fertilization envelope provide the exterior cast. These biofilms formed detailed replicas of the embryos they had replaced. Species of the common marine ...

First at-home test for vasectomized men proves to be safe, accurate

... there is only a remote chance of achieving pregnancy without assisted reproductive techniques such as intra-uterine insemination, in-vitro fertilization and intra-cytoplasmic sperm injection. In the consumer study of SpermCheck, 109 lay volunteers demonstrated its ease of use. Volunteers obtained ...

Rutgers scholar authors definitive biography of reproductive medicine pioneer

... CAMDEN As Louise Brown the first baby conceived by in vitro fertilization celebrates her 30th birthday in 2008, a new book coauthored by a Rutgers medical historian offers the first comprehensive insight into the influence ...

Rong Li Lab probes mechanism of asymmetry in meiotic cell division

... a protein called formin-2. This protein allows the oocyte to retain the majority of the cytoplasm a requirement for embryonic development after fertilization while the other daughter cell (called a polar body) resulting from the asymmetric division gets only a minimal amount and subsequently dies. The ...

Nitrogen applied

... Resource Conservation Center in Watkinsville, GA, in cooperation with Auburn University. Scientists investigated the effects of using nitrogen fertilization on rye cover crops, as well as the subsequent fertilizer availability to cotton. The focus of the study was on plots in the Tennessee Valley ...

Complex ocean behavior studied with 'artificial upwelling'

... and the ocean and understanding large-scale interactions is critical to understanding climate change." Some scientists have looked at iron fertilization as a way to trigger biological growth in nutrient-poor areas of the ocean, but "everything responds to iron," Letelier said. "You can't control what ...

American Chemical Society's Weekly PressPac -- Aug. 27, 2008

... A "lab on a chip" to improve success of in vitro fertilization Analytical Chemistry In a finding that could boost the success rate of in vitro fertilization (IVF), researchers report development of a tiny "lab on a chip" to evaluate the fitness of embryos harvested for transfer. A report on the approach ...

Research expedition on corals and global warming: Aug. 17-26 in Puerto Rico

... Through the workshop, she and other researchers will teach a group of 28 aquarium professionals from around the world how to collect coral spawn, do fertilization experiments, raise larvae, and care for larvae once they are shipped back to the participants' home institutions. The workshop, which is now in its ...

UT Knoxville professor finds unexpected key to flowering plants' diversity

... to the time that its' seed is fertilized. Williams noticed a recurring theme in the research papers he read: "They would usually describe how fertilization was occurring, but they never tell you much about timing," said Williams, an assistant professor of ecology and evolutionary biology at UT Knoxville. ...
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