Navigation Links
Biologists discover gene behind 'plant sex mystery'

An enigma unique to flowering plants has been solved by researchers from the University of Leicester (UK) and POSTECH, South Korea.

The discovery is reported in the journal Nature on 23 October 2008.

Scientists already knew that flowering plants, unlike animals require not one, but two sperm cells for successful fertilisation.

The mystery of this 'double fertilization' process was how each single pollen grain could produce 'twin' sperm cells. One to join with the egg cell to produce the embryo, and the other to join with a second cell in the ovary to produce the endosperm, a nutrient-rich tissue, inside the seed.

Double fertilisation is essential for fertility and seed production in flowering plants so increased understanding of the process is important.

Now Professor David Twell, of the Department of Biology at the University of Leicester and Professor Hong Gil Nam of POSTECH, South Korea report the discovery of a gene that has a critical role in allowing precursor reproductive cells to divide to form twin sperm cells.

Professor Twell said: "This collaborative project has produced results that unlock a key element in a botanical puzzle.

The key discovery is that this gene, known as FBL17, is required to trigger the destruction of another protein that inhibits cell division. The FBL17 gene therefore acts as a switch within the young pollen grain to trigger precursor cells to divide into twin sperm cells.

"Plants with a mutated version of this gene produce pollen grains with a single sperm cell instead of the pair of sperm that are required for successful double fertilization.

"Interestingly, the process employed by plants to control sperm cell reproduction was found to make use of an ancient mechanism found in yeast and in animals involving the selective destruction of inhibitor proteins that otherwise block the path to cell division.

"Removal of these blocks promotes the production of a twin sperm cell cargo in each pollen grain and thus ensures successful reproduction in flowering plants.

"This discovery is a significant step forward in uncovering the mysteries of flowering plant reproduction. This new knowledge will be useful in understanding the evolutionary origins of flowering plant reproduction and may be used by plant breeders to control crossing behaviour in crop plants.

"In the future such information may become increasingly important as we strive to breed superior crops that maintain yield in a changing climate. Given that flowering plants dominate the vegetation of our planet and that we are bound to them for our survival, it is heartening that we are one step closer to understanding their reproductive secrets."

Researchers at the University of Leicester are continuing their investigation into plant reproduction. Further research underway in Professor Twell's laboratory is already beginning to reveal the answers to secrets about how the pair of sperm cells produced within each pollen grain aquires the ability to fertilize.


Contact: Professor David Twell
University of Leicester

Related biology news :

1. The American Society of Plant Biologists announces 2007 awards
2. Biologists expose hidden costs of firefly flashes
3. Tufts University biologists link Huntingtons disease to health benefits in young
4. UD plant biologists uncover top wetland plants hidden weapon
5. Evolution is deterministic, not random, biologists conclude from multi-species study
6. Biologists find unusual plant gene: abstinence by mutual consent
7. Ant parasite turns host into ripe red berry, biologists discover
8. Cell biologists announce child-care grants for scientist-parents at annual meeting
9. Biologists surprised to find parochial bacterial viruses
10. Biologists at UC San Diego identify key protein in cells self-eating function
11. Biologists are from Mars, chemists are from Venus?
Post Your Comments:
Related Image:
Biologists discover gene behind 'plant sex mystery'
(Date:11/2/2015)... PARK, Calif. , Nov. 2, 2015  SRI ... $9 million to provide preclinical development services to the ... the contract, SRI will provide scientific expertise, modern testing ... wide variety of preclinical pharmacology and toxicology studies to ... --> The PREVENT Cancer Drug Development ...
(Date:10/29/2015)... , Oct. 29, 2015  Rubicon Genomics, ... for U.S. distribution of its DNA library preparation ... and Rubicon,s new ThruPLEX Plasma-seq kit. ThruPLEX Plasma-seq ... the preparation of NGS libraries for liquid biopsies--the ... diagnostic and prognostic applications in cancer and other ...
(Date:10/27/2015)... In the present market scenario, security is ... industry verticals such as banking, healthcare, defense, electronic gadgets, ... for secure & simplified access control and growing rate ... of bank accounts, misuse of users, , and so ... laptops, and smartphones are expected to provide potential opportunities ...
Breaking Biology News(10 mins):
(Date:11/27/2015)... ... November 27, 2015 , ... Pittcon is pleased ... technical presentations offered in symposia, oral sessions, workshops, awards, and posters. The ... range of applications such as, but not limited to, biotechnology, biomedical, drug discovery, ...
(Date:11/26/2015)... 26, 2015 ... Accutest Research Laboratories, a leading independent ... (CRO), has formed a strategic partnership ... Temple Health for joint work on ... ) , --> ...
(Date:11/25/2015)... , November 26, 2015 ... Biobanking Market 2016 - 2020 report analyzes that ... integrity and quality in long-term samples, minimizing manual ... cost-effectiveness. Automation minimizes manual errors such as mislabeling ... efficiency. Further, it plays a vital role in ...
(Date:11/25/2015)... 25, 2015 2 nouvelles études permettent ... les différences entre les souches bactériennes retrouvées dans la ... des êtres humains . Ces recherches  ouvrent une nouvelle ... prise en charge efficace de l,un des problèmes ... chats .    --> 2 nouvelles études ...
Breaking Biology Technology: