Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Scientists Discover What Plants Do During Long Winter Nights

02.01.2004


In research published today scientists at the John Innes Centre (JIC), Norwich(1), report on what plants do during the hours of darkness. During daylight hours plants use the energy from sunlight to power the production of food (sugar) from carbon dioxide and water. This process (photosynthesis) is well understood, but what happens when the sun goes down? The JIC researchers have found a previously unknown sugar transport system within plants and this has, for the first time, shed light on what plants do in the darkness. Their research is published in two related papers in international science journals ‘Science’ and ‘The Plant Journal’(2).

That plants use energy from sunlight to power the production of sugar from carbon dioxide and water is familiar to many people. Photosynthesis is a hugely important process because it sustains most of the food chains on the planet as well as recycling carbon dioxide and producing oxygen. Worldwide, plants use solar energy to capture millions of tonnes of carbon dioxide every day. They convert it first to sugar and then to carbohydrate, fat and protein – some of which we harvest for food.

”Photosynthesis is well understood, but our discovery is really exciting because it gives us a new insight into how plants control the use of the sugar that they produce” said Professor Alison Smith (Head of the Metabolic Biology Department and leader of the research team at the JIC). “We already know that sugar is the starting point for all of the processes of plant growth and development, but our work shows how plants ensure that even in the darkness of long winter nights, they have sufficient sugar to meet their needs”.



As well as making sugars from carbon dioxide, photosynthesis also makes some starch. This is temporarily stored in the leaf during the day. At night, when photosynthesis and hence conversion of carbon dioxide to sugars is not possible, the starch is broken down to make sugars. This maintains the supply of sugars, thereby allowing the plant to survive and grow during the hours of darkness. The discovery by John Innes Centre scientists reveals for the first time the mechanisms inside leaves that are responsible for converting millions of tonnes of starch to sugars each night.

The way that plants use the sugar they make in photosynthesis is of enormous significance in agriculture. Understanding how the sugar is used will enable plant breeders to develop crops in which more of the sugar goes into useful products in the seeds, leaves and tubers of crops. This will increase agricultural efficiency by increasing the proportion of useful material that crops produce. Conversion of starch into sugars is also of great significance in controlling the sweetness, taste, quality and storage characteristics of many fruits. In tomatoes, for example, higher starch content both improves processing quality and reduces the energy required for processing.

Ray Mathias | alfa
Further information:
http://www.jic.ac.uk
http://www.blackwellpublishing.com/journals/tpj

More articles from Life Sciences:

nachricht A novel socio-ecological approach helps identifying suitable wolf habitats
17.02.2017 | Universität Zürich

nachricht New, ultra-flexible probes form reliable, scar-free integration with the brain
16.02.2017 | University of Texas at Austin

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Breakthrough with a chain of gold atoms

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

In the field of nanoscience, an international team of physicists with participants from Konstanz has achieved a breakthrough in understanding heat transport

Im Focus: DNA repair: a new letter in the cell alphabet

Results reveal how discoveries may be hidden in scientific “blind spots”

Cells need to repair damaged DNA in our genes to prevent the development of cancer and other diseases. Our cells therefore activate and send “repair-proteins”...

Im Focus: Dresdner scientists print tomorrow’s world

The Fraunhofer IWS Dresden and Technische Universität Dresden inaugurated their jointly operated Center for Additive Manufacturing Dresden (AMCD) with a festive ceremony on February 7, 2017. Scientists from various disciplines perform research on materials, additive manufacturing processes and innovative technologies, which build up components in a layer by layer process. This technology opens up new horizons for component design and combinations of functions. For example during fabrication, electrical conductors and sensors are already able to be additively manufactured into components. They provide information about stress conditions of a product during operation.

The 3D-printing technology, or additive manufacturing as it is often called, has long made the step out of scientific research laboratories into industrial...

Im Focus: Mimicking nature's cellular architectures via 3-D printing

Research offers new level of control over the structure of 3-D printed materials

Nature does amazing things with limited design materials. Grass, for example, can support its own weight, resist strong wind loads, and recover after being...

Im Focus: Three Magnetic States for Each Hole

Nanometer-scale magnetic perforated grids could create new possibilities for computing. Together with international colleagues, scientists from the Helmholtz Zentrum Dresden-Rossendorf (HZDR) have shown how a cobalt grid can be reliably programmed at room temperature. In addition they discovered that for every hole ("antidot") three magnetic states can be configured. The results have been published in the journal "Scientific Reports".

Physicist Dr. Rantej Bali from the HZDR, together with scientists from Singapore and Australia, designed a special grid structure in a thin layer of cobalt in...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

Booth and panel discussion – The Lindau Nobel Laureate Meetings at the AAAS 2017 Annual Meeting

13.02.2017 | Event News

Complex Loading versus Hidden Reserves

10.02.2017 | Event News

International Conference on Crystal Growth in Freiburg

09.02.2017 | Event News

 
Latest News

Biocompatible 3-D tracking system has potential to improve robot-assisted surgery

17.02.2017 | Medical Engineering

Real-time MRI analysis powered by supercomputers

17.02.2017 | Medical Engineering

Antibiotic effective against drug-resistant bacteria in pediatric skin infections

17.02.2017 | Health and Medicine

VideoLinks
B2B-VideoLinks
More VideoLinks >>>