Navigation Links
Mechanism for the captation of nutrients in plants- unknown to date

This finding, carried by the latest issue of the Japanese journal, Plant Cell Physiology, will enable the design of experiments aimed at enhancing vegetable species in the interest of humanity.

Researchers at the Institute have shown that, in the presence of saccharose (a substance produced in leaves to be subsequently distributed around the plant), the cells of the reserve organs - such as roots, tubers, seeds or fruits - "swallow up" nutrients in order to metabolise and store them. These "swallowed-up" substances are incorporated into micro-vesicles that end up pouring their contents into an internal compartment of a vegetable cell known as the vacuola. Once inside the vacuola, the substances or nutrients are broken up, stored and metabolised.

Two processes of captation

This discovery breaks with a fundamental dogma in basic plant science holding that all substances penetrate the interior of the cell through the participation of specific transporters present in the plasma membranes - a model implying that, if hundreds of substances enter vegetable cells and each substance has its specific transporter, or even if one transporter can recognise 3 or 4 different substances, an infinity of such transporters would be required.

The conclusion of this research is that, while not discarding the existence of specific transporters in plasma membranes, their number and relevance is considerably inferior to what has been believed to date. In the absence of saccharose, nutrients can penetrate the cell by means of transporters, but the amount entering through this mechanism is less than that incorporated via endocitosis.

Thus, the experiments carried out showed the existence of processes independent of nutrient captation: a saccharose penetration process independent of "endocitosis" and another dependent on "endocitosis" and which required approximately 90 minutes from the time the cell started to capture saccharose in order to start functi oning. That is, for these first 90 minutes, the saccharose penetrates using the transporter mechanism while, parallely, the endocitosis phenomenon is activated to form microvesicles. Subsequently, the cell starts to capture huge quantities of saccharose through endocitosis.

The results of the research has shown, moreover, that only saccharose is capable of initiating endocitosis, given that, in the trials undertaken with substances similar to saccharose, such as glucose or fructose, the fact that none of these triggered the process could be confirmed.

Moreover, given that endocitosis is involved in the acquisition of substances for their subsequent conversion into "end products" (such as starch, oils, celluloses, etc.), basic knowledge of this mechanism provides great tips for the rational design of experiments aimed at enhancing vegetable species in the interest of humanity.

One of the great questions thrown up by the fact that saccharose pick-up is produced via endocitosis is, fundamentally, to find out if the saccharose captured through endocitosis is that involved in starch production. If this is the case, it will be necessary to discover what are the genetic and molecular mechanisms involved in the process, in order to improve the plant varieties. For example, in order to increase starch production in potato or maize, endocitosis would have to be encouraged through the stimulation of the genes involved in the formation of the vesicles ?a hypothesis that is currently being verified.


'"/>

Source:Elhuyar Fundazioa


Related biology news :

1. Mechanism regulating tooth shape formulation found
2. Mechanism for Epstein-Barr virus proteins role in blood cancers discovered
3. Mechanism for memory revealed in neurons of electric fish
4. Mechanism identified for promising neurological drug
5. Mechanism for neurodenegerative diseases linked to transport proteins
6. Mechanisms involved with tumor relapse identified
7. Mechanism of nicotines learning effects explored
8. Too much of a good thing? Excess nutrients or water limit biodiversity
9. Fish extinctions alter critical nutrients in water, study shows
10. Team of international scientists departs today to discover the unknown in Chinas Himalayan region
11. Can you hear me now? Scientists find previously unknown receptors on adult stem cells
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:4/11/2017)... April 11, 2017 Crossmatch®, a globally-recognized ... solutions, today announced that it has been awarded ... Projects Activity (IARPA) to develop next-generation Presentation Attack ... "Innovation has been a driving force within ... will allow us to innovate and develop new ...
(Date:4/11/2017)... 2017 No two people are believed ... New York University Tandon School of Engineering and ... that partial similarities between prints are common enough ... phones and other electronic devices can be more ... lies in the fact that fingerprint-based authentication systems ...
(Date:4/6/2017)... April 6, 2017 Forecasts by ... Document Readers, by End-Use (Transportation & Logistics, Government & ... Gas & Fossil Generation Facility, Nuclear Power), Industrial, Retail, ... Are you looking for a definitive report ... ...
Breaking Biology News(10 mins):
(Date:10/10/2017)... ... October 10, 2017 , ... USDM Life Sciences , ... life sciences and healthcare industries, announces a presentation by Subbu Viswanathan and Jennifer ... “Automating GxP Validation for Agile Cloud Platforms,” will present a revolutionary approach to ...
(Date:10/9/2017)... ... October 09, 2017 , ... At its national board meeting in ... professor in Harvard University’s Departments of Physics and Astronomy, has been selected for membership ... the winning team for the 2015 Breakthrough Prize in Fundamental physics for the discovery ...
(Date:10/7/2017)... ... October 06, 2017 , ... ... genomic technologies, launched its ProxiMeta™ Hi-C metagenome deconvolution product, featuring the first ... accompanying cloud-based bioinformatics software to perform Hi-C metagenome deconvolution using their own ...
(Date:10/5/2017)... ... , ... LabRoots , the leading provider of educational and interactive virtual ... to cancer research with a month-long promotion supporting the advancement of breast cancer research ... use promo code PinkRibbon to get 10 percent off their purchase of every the ...
Breaking Biology Technology: