Sentences with phrase «plant stomata»

http://chiefio.wordpress.com/2012/03/02/doubting-oxygen-isotopes/ The second compares the determined ice core carbon dioxide values from 13C: 12C ratio with contemporary values from plant stomata.

But the record of fossil plant stomata refutes the ice - core record, at least over the last 13,000 years.

Plant stomata decrease in both size and number in what seems to be a intrinsic functional adaptation that persists in the plant genome through epochs of different background carbon concentrations.

CO2: Ice Cores vs. Plant Stomata Watts Up With That?

There is evidence plant stomata decrease in number and size with increased CO2.

If CO2 levels are higher then plant stomata will tend to remain open for a * shorter * period of time since the plant will more quickly be able to absorb the CO2 required for growth.

«If I were to go to a conference of plant physiologists and say, «Hey, is there diversity in the way that plant stomata behave?»

I'm pretty sure plant stoma suggest they were much more variable (ask Tony Brown).

I'm pretty sure plant stoma suggest otherwise.

The only other long term CO2 reconstructions are plant stoma that I am aware of.

Not exact matches

For example, when plants close their stomata, they use less soil water, changing the amount of soil water available to other plants.

The researchers believe the greening is a response to higher atmospheric carbon dioxide inducing decreases in plant stomatal conductance — the measure of the rate of passage of carbon dioxide entering, or water vapor exiting, through the stomata of a leaf — and increases in soil water, thus enhancing vegetation growth.

When a plant's pores, called stomata, open to allow carbon dioxide to enter, they simultaneously allow water to escape.

«CRSP plays a pivotal role in allowing the plant to produce the right amount of stomata in response to the concentration of CO2 in the atmosphere.

«For each carbon dioxide molecule that is incorporated into plants through photosynthesis, plants lose about 200 hundred molecules of water through their stomata,» explains Julian Schroeder, a professor of biology who headed the research effort.

or stomata, the tiny openings on the leaf surface through which plants absorb gases needed for photosynthesis, can provide clues to land elevation over time.

When the plants are deprived of water, the researchers found that stomata take an average of 25 minutes to open, while the amount of time for the stomata to close falls to 45 minutes.

Even with the closure of their stomata, plants still lose water when it's hot, and hydraulic failure — a lack of water a tree needs to survive — poses at least as much a threat as carbon starvation.

For example, alone among land plants, liverworts don't have stomata, or pores, in their leaves.

For this study, the researchers tested the sensors on a plant called the peace lily, which they chose in part because it has large stomata.

Plant biologists know that stomata open when exposed to light and close in darkness, but the dynamics of this opening and closing have been little studied because there hasn't been a good way to directly measure them in real time.

Engineered plants conserve 25 percent more water by only partially opening their mouth - like stomata, allowing less water to escape through transpiration while carbon dioxide enters the plant to fuel photosynthesis.

Stomata are the gatekeepers to plants: When open, carbon dioxide enters the plant to fuel photosynthesis, but water is allowed to escape through the process of transpiration.

He and Abordo, a mathematics major at the time, jumped at the chance to study how plants adjust their stomata in response to different atmospheric conditions.

Because CO2 can aid the growth of plants — and close down stomata as well to protect against O3 invasion — it was unclear how vegetation worldwide would respond to such an increase in emissions of both CO2 and O3.

These plants react to the warning by closing their stomata — tiny openings on their leaves — to slow down moisture loss.

ABA then moves throughout the plant to signal the stressful conditions and close the stomata.

Anyone awed by towering redwoods should offer thanks to stomata, the tiny pores on the leaves of all trees and other vascular plants.

They suggest complex stomata evolved to help early plants control moisture in their spore capsules and that other plants later exploited these pores to breathe in carbon dioxide and exhale water vapor.

Stomata, in short, helped plants colonize the landscape and transform the planet.

As a plant breathes, the stomata open to release water as vapor, so plants with fewer stomata should be better at retaining water.

To grow, plants must take in carbon dioxide through valves in the leaves called stomata.

In contrast to more developed vascular plants with roots, stems, leaves, and vasculature, which are necessary for the transport of water and nutrients, it remained unclear in the case of mosses, which have no vasculature, which genes are responsible for the development of stomata.

Because stomata facilitate an efficient gas exchange with the atmosphere, they enabled the spread of plants and the subsequent evolution of our complex ecosystems.

In particular, they investigated stomata, small pores on plant leaves that take in carbon dioxide and lose water to the atmosphere.

It was a mystery whether all plants use the same genes as Arabidopsis to produce stomata, or whether all the different stomatal forms and patterns result from each plant using its own unique set of genetic blueprints.

New work from the lab of Dominique Bergmann, honorary adjunct staff member at Carnegie's Department of Plant Biology and professor at Stanford University, reveals ways that the systems regulating the development of stomata in grasses could be harnessed to improve plant efficiency and agricultural yPlant Biology and professor at Stanford University, reveals ways that the systems regulating the development of stomata in grasses could be harnessed to improve plant efficiency and agricultural yplant efficiency and agricultural yield.

Plants have tiny pores on their leaves called stomata — Greek for mouths — through which they take in carbon dioxide from the air and from which water evaporates.

What's more, stomata have been found in fossils dating back 400 million years, and are features of nearly every land plant alive today, although they can take on different appearances in different kinds of plants.

Surprisingly, these differences don't occur because grasses use unique stomata genes, but because they use the same genes as other plants in different ways.

Most of what we know about how genes shape stomata comes from studies of one «model» plant, Arabidopsis, a relative of broccoli and cabbage, which is very different from the grasses studied here.

Grass stomata have a different shape — a dumbbell — instead of the kidney bean - shaped ones found in most plants, and grasses have their stomata all aligned in regimented rows along the leaf blade, as opposed to the more haphazard distribution on broad - leafed plants.

What is exciting about these findings is that «now we have a handle on the genes that comprise a universal toolkit for building stomata,» Bergmann explained, «plants apparently use the same common parts, but the ways these parts function and interact with each other are different, which is both interesting from a discovery science perspective and could be harnessed to improve growth performance in grasses that humans use for food or fuel.»

The decision to study stomata in grasses was made not just because these plants are economically and environmentally important, but because grasses show several unique innovations that make their stomata much more efficient in taking up carbon dioxide while limiting water loss.

The next step was to soak the plants in that solution and pressurize them, which causes the particles to enter the leaves through tiny pores called stomata.

You see, plants have these tiny pores on the undersides of their leaves called stomata.

Because the stomata (pores on the leaves) of many plants will close at night, water will attempt to squeeze out at the edges and tips of leaves.

Some plants may close their stomata at night.

Because stomata of the plant usually close at night, water can squeeze out at the edges and tips of leaves, gathering in droplets.

stoma (plural stomata) A tiny opening in the surface of a plant leaf or stem.