A team of scientists showed a new, steady way for plants to increase carbon dioxide (CO2) Absorption for photosynthesis while reducing water consumption.
Breakthrough under the leadership of the group of plant scientists at the University of Glasgow and published in the journal scienceResearchers have used new, synthetic light-activated ion channel constructed from plant viral proteins and algae to accelerate the opening and closing of stomata – pores in letters rasteniy- through which carbon dioxide (CO2) Have been reported for photosynthesis.
Stomata also the main route for the loss of water plants. Previous attempts to reduce water consumption, manipulating these pairs usually has to pay a CO2 absorption.
Thus, plants constructed in Glasgow showed improved growth while keeping water consumption.
Scientists modified plants grew normally and substantially better at light conditions characteristic field, fixing a CO2 while losing less water into the atmosphere.
Crop irrigation accounts for about 70% of fresh water use on the planet, and its use has spread to unsustainable rates of the past three decades. Scientists are trying to find ways to make the plants grow with less water. Until now, most of the studies did not reduce the consumption of water, but at the potential cost of a reduced CO2 absorption and plant growth. This is not a & # 39 is satisfactory approach in general, given the growing demand for agricultural products of food.
This new research suggests another approach that can successfully improve growth without compromising the efficiency of water use.
The researchers studied the plant Arabidopsis, a family member of the & # 39; and mustard. The use of light-activated ion channel, called flashing responses stomatal plant were accelerated and better synchronized when grown in the light fluctuations – the conditions that a & # 39 are representative of the environment (e.g., if the clouds pass overhead or if shade adjacent plants). These engineered plants showed improved growth and biomass production while conserving water.
Co-co-author Professor John Christy of the University Institute of Molecular, Cell and Systems Biology, said: "Our results suggest the possibility of increasing the efficiency of water use by plants, making progress in photosynthetic CO2 plant assimilation and growth. "
Professor Mike Blatt said: "Previous efforts to increase the efficiency of water plants have focused on the reduction in the density of stomata, despite the implicit penalty of CO2 uptake for photosynthesis. Alternative approaches such as the one we used to bypass carbon compromise water and can be used to increase the yield, particularly in restricting the water ".
Lead author Mary Papanatsiou said: "Plants have to optimize the compromise between photosynthesis and loss of water for plant growth and crop We accept a well-established approach used in neurology, called optogenetics to better equip the stomata, which are essential in balancing CO.2 absorption and water loss.
"We used a genetic tool that acts as a switch, which allows the stomata are better synchronized with the light conditions and, therefore, increase the productivity of the enterprise under light conditions often encountered in agricultural conditions."
Rice with fewer stomata requires less water and better suited to the climate change
Papanatsiou M. et al. Optogenetics stomatal manipulation improves the kinetics of carbon assimilation, water use, and growth, science (2019). DOI: 10.1126 / science.aaw0046
University of Glasgow
A new, more effective way to reduce water consumption and improve plant growth (2019, March 29)
I received 31 March 2019
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