Transpiration sentence example
Transpiration is loss of water by the plant by evaporation, chiefly from the minute pores or stomata on the leaves.
The importance of transpiration, is, however, so great, that these risks must be run.
Good ventilation is indispensable to allow the worm to give out by transpiration the great quantity of water that it absorbs with the leaf.
This arrangement is a method of checking transpiration by creating a still atmosphere above the pore of the stoma, so that water vapour collects in it and diminishes the further outflow of vapour.
The leaves of the plant regulate the amount of water they hold through transpiration.Advertisement
The science class studied transpiration by doing an experiment with plants in a controlled environment.
The lower surface of the potato leaf is furnished with numerous organs of transpiration or stomata, which are narrow orifices opening into the leaf and from which moisture is transpired in the form of vapour.
This is found especially in plants which during certain hours of the day are unable to cover the water lost through transpiration by the supply coming from the roots.
These adaptations tend to lessen the amount of transpiration by protecting the stomata from the movements of the air.
After water is warmed by the sun, it turns into vapor and passes through pores in the plants by the process of transpiration.Advertisement
The amount of water that escapes from plants through transpiration is clearly miniscule compared to the volume of water evaporating from oceans.
To prevent wind rock or excessive transpiration trim the leaves by about half.
Wheats of moist climates, on the other hand, have broader leaves, to admit of more rapid transpiration.
The evaporation which is associated with transpiration is no doubt another, but by themselves they are insufficient to explain the process of lifting water to the tops of tall trees.
Although transpiration is a necessary accompaniment of nutrition, it may easily become excessive, especially where the plant cannot readily recoup itself.Advertisement
Spinifex has long growth which reduces transpiration in strong winds these are the first plants to colonize the sand dunes.
The plants soak up moisture from the soil, then give the moisture back into the air through a process called transpiration.
The flow of water up the plant is called the transpiration stream.
The work of the leaves may briefly be stated to consist of the processes of nutrition, respiration and transpiration.
Indeed, the tendency to absorb heat in this way, either from the air or directly from the sunlight, has already been pointed out as a danger which needs to be averted by transpiration.Advertisement
In these circumstances " syringing " and " damping down " are of value in cooling the temperature of the air in hothouses and greenhouses and increasing its humidity, thereby checking excessive transpiration.
A large proportion of the water which ascends to the leaf acts merely as a carrier for the other raw food materials and is got rid of from the leaf in the form of water vapour through the stomata - this process is known as transpiration.
Hence the extended surface of the leaf exposing a large area to light and air is eminently adapted for the carrying out of the process of photo-synthesis and transpiration.
Knowing a professional driver is available for all of your transpiration needs is a relief.
Water will be lost through transpiration or just used for maintaining turgor in cells.Advertisement
Symptoms include reduced root growth, and inhibition of various physiological processes including transpiration, respiration and photosynthesis.
This large evaporation, which constitutes the so-called transpiration of plants, takes place not into the external air but into this same intercellular space system, being possible only through the delicate cell-walls upon which it abuts, as the external coating, whether bark, cork or cuticle, is impermeable by watery vapour.
Mechanism and Function of StomataIt is not quite exact to speak of either the gaseous interchanges or the transpiration as taking place through the stomata.
The older is that the water travels in the woody cell-walls of the vascular bundles, mainly under the action of the forces of root pressure and transpiration, and that the cavities of the vessels contain only air.
The true remedies consist in the avoidance of the fermentation of the leaves by careless gathering, transport or packing, in proper hygienic care in ventilation and in maintaining a proper degree of dryness in the atmosphere in rainy weather, and in the use of quicklime placed in different parts of the nursery to facilitate the transpiration of the silk-worms.Advertisement
Klebs has concluded that transpiration is the important factor in determining the formation of sporangia, while zygotedevelopment depends on totally different conditions; these results have been called in question by Falck.
The mycelium from the germinating sporangia or zoospores soon finds its way into the tissues of the potato leaf by the organs of transpiration, and the process of growth already described is repeated -over and over again till the entire potato leaf, or indeed the whole plant, is reduced to putridity.
He subsequently examined the passage of gases through septa or partitions of indiarubber, unglazed earthenware and plates of metals such as palladium, and proved that gases pass through these septa neither by diffusion nor effusion nor by transpiration, but in virtue of a selective absorption which the septa appear to exert on the gases in contact with them.
He found that dilution with water does not effect proportionate alteration in the transpiration velocities of different liquids, and a certain determinable degree of dilution retards the transpiration velocity.
They do n't have a thick, waxy cuticle that prevents transpiration.Advertisement
The more active the plant is, the greater the transpiration rate.
Much current scientific effort is targeted at understanding the genotypic component of the transpiration efficiency of individual plants.
Once the cuttings are inserted into the soil, I trim the remaining leaves in half to cut down on transpiration loss.
Surface transpiration along a few regularly spaced sections of the bottom wall is used to control the flow.
How does colored light and light intensity affect the rate of transpiration in plants?Advertisement
Scrub also has a drying effect on the area due to transpiration of water through the leaves.
Comparison is also being made with a separate 50-year control run of the same model which did not include a plant transpiration term.
The atmosphere is a cause of disease in the neighborhood of chemical works, large towns, volcanoes, &c., in so far as it carrie, acid gases and poisons to the leaves and roots; but it is usual tc associate with it the action of excessive humidity which brings about those tender watery and more or less etiolated condition, which favor parasitic Fungi, and diminish transpiration and therefore nutrition.
Many larvae of beetles, moths, &c., bore into bark, and injure the cambium, or even the wood and pith; in addition to direct injury, the interference with the transpiration current and the access of other parasites through the wounds are also to be feared in proportion to the numbers of insects at work.
Recent researches point to definite external conditions of moisture, affecting the processes of respiration and transpiration, &c., as being responsible for some of these.Advertisement
Xerophytes.These plants have devices (a) for procuring water, (b) or for storing water, (c) or for limiting transpiration; and these adaptations are obviously related to the physically or physiologically dry habitats in which the plants live.
All such plants agree in reducing transpiration to zero during the unfavourable season, although few or no xerophytic characters may be demonstrable during the period favorable to growth.
According to Maxwell, priority in showing the necessity for slipping over the boundary rests with Reynolds, who also discovered the cognate fact of thermal transpiration, meaning thereby that gas travels up the gradient of temperature in a capillary tube, owing to surface-actions, until it establishes such a gradient of pressure (extremely minute) as will prevent further flow.
It has been supposed that because the surface of the young leaves is small transpiration is correspondingly feeble; but it must be remembered, not only that their newlyformed tissue is unable without an abundant supply of sap from the roots to resist the excessive drying action of the atmosphere, but that, in spring, the lowness of the temperature at that season in Great Britain prevents the free circulation of the sap. The comparative dryness of the atmosphere in spring also causes a greater amount of transpiration then than in autumn and winter.
They don't have a thick, waxy cuticle that prevents transpiration.Advertisement
In a general way this greater complexity may be said to consist (I) in the restriction of regular absorption of water to those parts of the plant-body embedded in the soil, (2) in the evaporation of water from the parts exposed to the air (transpiration).
A very common function of hairs is to diminish transpiration, by creating a still atmosphere between them, as in the case of the sunk stomata already mentioned.
It thrives in a warm atmosphere, even in a very hot one, provided that it is moist and that the transpiration is not in excess of the supply of water.