What Are Photosynthesis and Respiration?

Leaf area determines light interception and thus influencesdry matter production of plants. Similarly, it plays an important role indetermining plant CO2 uptake and photosynthesis (Liu and Stütze,2002). The different genotypes of Asian pear varied in the time required toreach

Transpiration - Water Movement through Plants

I will then stop the fan and proceed to measuring the rate of transpiration as follows: [IMAGE] 1.

Respiration and Transpiration - The Plant Cycle

Leaf photosynthesis was measured using the LI-6200 portablephotosynthesis system (LI-COR, Lincoln, Nebraska 68504, USA) on attachedleaves in the field between 10:00 a.m. and 2:00 p.m. (Beijing time) on sunnydays. Air temperature (Ta), leaf temperature (Tf), relative humidity (Rh), netphotosynthesis (Pn), stomatal conductance (Gs), intercellular CO2concentration (Ci), stomatal resistance (Rs), and stomatal conductance (Cs)were measured or calculated. Leaf gas exchange readings were taken byquadrants (i.e., readings were taken from the eastern, southern, western, andnorthern quadrants of each tree) to minimize any potential environmentalimpacts.

plant transpiration | Photosynthesis | Plants

(However, plants generate daily variations in concentrations of oxygen and carbon dioxide through their photosynthetic and respiratory activities.) Thermal profiles at midday in corn fields at various stages of growth are shown in Figure 4.4, demonstrating the marked reduction in ground temperature due especially to shading.

Stomatal control of photosynthesis in detached leaves of woody and herbaceous plants.

Transpiration and Stomata - AP Bio Plants Review

were used, while just the middle layer of herbaceous leaves at the flowering stage was used in experiments.

A GFS 3000 high precision portable gas measuring system was used to measure the photosynthetic CO2 exchange and leaf transpiration under optimal photosynthesis conditions.

Chlorophyll content was measured spectrophotometrically

The undetached leaves were placed into a clip chamber with an artificial light source at constant temperature and humidity, and measured for 25-35 minutes.

What Are Photosynthesis and Respiration? - dummies

The photosynthesis/transpiration compromise revisited
Although it seems as thoughwater loss is a serious, intractable problem for a plant, it is NOT.

As these plants photosynthesize, they convert inorganic materials into organic matter.

Difference between Respiration and Photosynthesis

Plants require large amounts of water just to satisfy the requirements of transpiration: a large tree may transpire hundreds of litres of water in a day. Water evaporates from leaves through stomates, which are pores whose aperture is controlled by two guard cells. Plants must keep their stomates open in order to take up CO2 as the substrate for photosynthesis (Chapter 2). In the process, water is lost from the moist internal surfaces of the leaf through the stomatal pores (Figure 3.1). Water loss also has a benefit in maintaining the leaf temperature through evaporative cooling.

photosynthesis, photorespiration and transpiration byLucerne leaves of different ages. Austr. J. Plant Physiol. 1:561-578.

What Is Transpiration in Plants

Salih, F.A. 1977. Influence of plant age on the ratephotosynthesis and respiration, and chlorophyll content of four isogenic linesof barley ( L.). Phptpsynthetica 11: 207-210.

In this activity, your students will observe the process of transpiration. They will determine the rate of transpiration for one plant branch.

Environmental Factors Affecting Transpiration in Plants


Figure 2 (a, b) shows the pattern in woody plants
Figure 2 (c,d) shows the pattern in herbaceous plants
GRAPH 3: The directly proportional relationship between photosynthesis and transpiration
was due to limitation of gas exchange by the stomatal conductance of the leaf.

P.