Navigation Links
U of T discovers environmental factors linked to sex ratio of plants
Date:7/22/2008

TORONTO, ON. Environmental factors can transform the ratio of females to males in plant populations according to new research out of the University of Toronto.

The study conducted by Ivana Stehlik, a lecturer, Jannice Friedman, a PhD candidate, and Spencer Barrett, a professor, involved a novel approach using genetic markers (known DNA sequences) to identify the sex of seeds. The team investigated six natural populations of the wind-pollinated herb Rumex nivalis in the Swiss Alps and mapped the distance between females and neighbouring males. They then measured the amount of pollen captured by female flowers and collected seeds from the plants when they were mature.

"The plant has strongly female-biased flowering sex ratios in these populations. We wanted to find out the mechanism causing the bias," said Barrett. "We found that where there were more males surrounding females, females captured more pollen, matured more seed and produced more strongly female-biased offspring."

The authors suggest that when females capture large amounts of pollen, female-determining pollen tubes out-compete male-determining pollen tubes to fertilize the single ovule in each flower.

Barrett leads a world-renowned research group working on the genetics and evolution of plant reproduction. His pioneering work has had a profound influence on the understanding of biological invasions, weed management strategies and conservation biology. "Our results demonstrate for the first time that demographic aspects of the mating environment of plants can influence the sex ratios of plants females produce," added Barrett.


'/>"/>

Contact: Christa Poole
christa.poole@utoronto.ca
416-978-6974
University of Toronto
Source:Eurekalert

Page: 1

Related biology news :

1. deCODE discovers cause of major subtype of glaucoma
2. CU-Boulder team discovers first ancient manioc fields in Americas
3. Weill Cornell team discovers how brains own tPA helps regulate blood flow to neurons
4. QUT researcher discovers Maya mask splendor
5. CSHL scientists part of team that discovers role of rare gene mutations in schizophrenia
6. Researcher discovers pathway plants use to fight back against pathogens
7. NYU dental professor discovers biological clock linking tooth growth to other metabolic processes
8. Study finds environmental tests help predict hospital-acquired Legionnaires disease risk
9. Genes, Environment and Health Initiative invests in genetic studies, environmental monitoring
10. UCR engineers to develop new tool to measure how environmental exposures affect health
11. TAU scientists probe deep questions aboard EcoOceans environmental research ship
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/20/2016)... Dec. 20, 2016 The rising popularity ... and leasing is stoking significant interest in keyless ... technology, Bluetooth low energy (BLE), biometrics and near-field ... next wave of wireless technologies in the automotive ... to advanced access systems opens the market to ...
(Date:12/16/2016)... Dec. 16, 2016   IdentyTechSolutions America LLC ... products and solutions and a cutting-edge manufacturer of ... it is offering seamless, integrated solutions that comprise ... products. The solutions provide IdentyTech,s customers with combined ... facilities from crime and theft. "We ...
(Date:12/15/2016)... BADEN-BADEN, Germany , December 15, 2016 /PRNewswire/ ... services provider, today announced an agreement with NuData Security, ... join forces. The partnership will enable clients to focus on ... with local data protection regulation. ... In order to provide a one-stop ...
Breaking Biology News(10 mins):
(Date:1/24/2017)... Jan. 24, 2017  Bruker today announced ... technology leader in the development, manufacture, and ... adds Hysitron,s innovative nanomechanical testing instruments to ... (AFMs), surface profilometers, and tribology and mechanical ... in nanomaterials research markets. Hysitron,s 2016 revenues ...
(Date:1/24/2017)... ... January 24, 2017 , ... Men who have a high ... a positive association with increased prostate growth or benign prostatic hyperplasia, according to ... involved 571 Korean men who underwent urological examinations, including serum prostate specific ...
(Date:1/24/2017)... 2017 /PRNewswire/ - ProMetic Life Sciences Inc. (TSX: PLI) (OTCQX: ... orally active lead drug candidate, PBI-4050, has been issued ... Medicines and Healthcare Products Regulatory Agency ("MHRA") for the ... PIM designation is an early indication that a medicinal ... to Medicines Scheme ("EAMS"), intended for the treatment, diagnosis ...
(Date:1/24/2017)... CORAL GABLES, Fla. , Jan. 23, 2017 ... interdisciplinary network focused on scientific discovery and solutions, ... is creating the Frost Institutes for Science and ... technology, engineering, and mathematics (STEM) to help solve ... University of Miami President Julio Frenk ...
Breaking Biology Technology: