Navigation Links
Annuals converted into perennials
Date:11/9/2008

Annuals and perennials

Annual crops grow, blossom and die within one year. Perennials overwinter and grow again the following year. The life strategy of many annuals consists of rapid growth following germination and rapid transition to flower and seed formation, thus preventing the loss of energy needed to create permanent structures. They germinate quickly after the winter so that they come out before other plants, thus eliminating the need to compete for food and light. The trick is basically to make as many seeds as possible in as short a time as possible.

Perennials have more evolved life strategies for surviving in poor conditions. They compose perennial structures such as overwintering buds, bulbs or tubers. These structures contain groups with cells that are not yet specialised, but which can later be converted when required into new organs such as stalks and leaves.

The flowering of annuals

Annual crops consume all the non-specialised cells in developing their flowers. Thus the appearance of the flower signals means the end of the plant. But fortunately they have left seeds that sense after winter that the moment has come to start up. Plants are able to register the lengthening of the days. With the advent of longer days in the spring, a signal is sent from the leaves to the growth tops to activate a limited number of blooming-induction genes.

Deactivating two genes

VIB researchers, such as Siegbert Melzer in Tom Beeckman's group, have studied two such flower-inducing genes. They have deactivated them in thale cress (Arabidopsis thaliana), a typical annual. The VIB researchers found that mutant plants can no longer induce flowering, but they can continue to grow vegetatively or come into flower much later. Melzer had found that modified crops did not use up their store of non-specialised cells, enabling perennial growth. They can therefore continue to grow for a very long time.

As with real perennials these plants show secondary growth with wood formation creating shrub-like Arabidopsis plants.

Raising the veil of evolution

Researchers have been fascinated for a long time by the evolution of herbaceous to woody structures. This research clearly shows only two genes are in fact necessary in this process. This has probably been going on throughout the evolution of plants. Furthermore it is not inconceivable this happened independently on multiple occasions.


'/>"/>

Contact: Sooike Stoops
sooike.stoops@vib.be
32-474-289-252
VIB (the Flanders Institute for Biotechnology)
Source:Eurekalert

Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2016)... , Jan. 22, 2016 ... addition of the "Global Biometrics Market ... their offering. --> http://www.researchandmarkets.com/research/p74whf/global_biometrics ... "Global Biometrics Market in Retail Sector ... --> Research and Markets ( ...
(Date:1/20/2016)... , Jan. 20, 2016   MedNet Solutions ... the entire spectrum of clinical research, is pleased to ... MedNet,s significant achievements are the result of the company,s ... iMedNet eClinical , it,s comprehensive, easy-to-use and ... --> Key MedNet growth achievements in ...
(Date:1/15/2016)... SAN JUAN, Puerto Rico , Jan. 15, 2016 ... forcing companies big and small to find new ways ... data driven culture. iOS and ... their device based on biometrics, transforming it into a ... can request that users swipe their fingerprint on their ...
Breaking Biology News(10 mins):
(Date:2/8/2016)... 2016  NanoViricides, Inc. (NYSE MKT: NNVC) (the "Company"), a nanomedicine ... , MD, MPH, will present information about the company,s programs at ... New York City . --> ... Room at 5:30PM EST. Registered attendees can request a one on ... . --> New York City ...
(Date:2/8/2016)... February 8, 2016 ... or the "Company"), the ultra-rapid Point-Of-Care (POC) molecular diagnostics company, ... its Chlamydia trachomatis (CT) test to be launched on the ... Directive (98/79/EC), the CT test is now cleared for sale ... --> The launch of the io® CT test signals ...
(Date:2/5/2016)... ATCC, the premier global biological materials resource ... and life science researchers that are working to address ... CDC website . --> CDC ... a single-stranded RNA virus of the Flaviviridae family, genus ... Chikungunya Viruses. Zika virus is transmitted to humans primarily ...
(Date:2/5/2016)... FRANCISCO , February 5, 2016 ... a biotechnology company focused on developing products for ... has requested Rare Pediatric Disease Designation (RPDD) from the ... pigmentosa (RP) with MANF. MANF was previously granted orphan ... 2014. --> Amarantus BioScience Holdings, Inc. ...
Breaking Biology Technology: