Effects of water stress on photosynthesis and respiration of two populations of sweetgum ... by Donald Bruce Zobel

Cover of: Effects of water stress on photosynthesis and respiration of two populations of sweetgum ... | Donald Bruce Zobel

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  • Sweetgum,
  • Physiology,
  • Trees

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Paginationiv, 37 l.
Number of Pages37
ID Numbers
Open LibraryOL26648282M

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Zobel, Donald Bruce (). Effects of Water Stress on Photosynthesis and Respiration of Two Populations of Sweetgum. Master's thesis, Duke by: 1. iv, 37 l. 29 cm. Effects of Water Stress on Photosynthesis and Respiration of Two Populations of SweetgumPages: Effects of water stress on photosynthesis and respiration of two populations of sweetgum By.

Zobel, Donald Bruce, Publication Details. Holding Institution. Search Inside This Book: Results For: Click/Shift+Click pages to select for download.

zoom out Zoom zoom in. Respiration, unlike photosynthesis, never halts, and it reflects the overall metabolism. However, the data available on the effect of water stress on respiration show large variation, from inhibition to stimulation under different water-stress by: Abstract.

Responses of photosynthesis to water stress has been subjected to study in recent years. This review briefly describes, how stress affects photosynthesis in crops and the causes of the effects on cell by:   Under water stress cell expansion is slows down and plant growth is retarded and water stress influences cell enlargement more than cell division as well as altered photosynthesis, respiration.

Effects of water stress on respiration, photosynthetic pigments and water content in two maize cultivars Article (PDF Available) in Pakistan Journal of Biological Sciences 10(22)   Water stress substantially alters plant metabolism, decreasing plant growth and photosynthesis 1,2,3,4 and profoundly affecting ecosystems and.

The main aim of this research was to compare the photosynthetic responses of two species of Prosopis, Prosopis chilensis (algarrobo) and Prosopis tamarugo (tamarugo) subjected to heat and water stress, to determine how heat shock or water deficit, either individually or combined, affect the photosynthesis of these two species.

The photosynthetic rates expressed as a function of photon. INTRODUCTION. Water stress is considered as one of the most important factors limiting plant performance and yield worldwide (Boyer, ).

Effects of water stress on plant’s physiology, including growth (MC Donald and Davies, ), signaling pathways (Chaves et al., ), gene expression (Bray, ) and leaf photosynthesis (Flexas et al., a; Lawlor and Cornic, ) have been studied. Nayer Mohammadkhani. and Reza Heidari., Effects of Water Stress on Respiration, Photosynthetic Pigments and Water Content in Two Maize Cultivars, Pakistan.

Introduction. Low water availability is considered the main environmental factor limiting plant growth and yield in semiarid areas (Boyer, 1 ).The water stress‐induced limitation on plant growth is mainly caused by reductions in plant carbon balance, which depends on the balance between photosynthesis and respiration (Flexas et al., a).The response of photosynthesis to water stress.

The Effect of Water Stress on Plants. Water is vital to the existence of plant life. Not only do plants use it to keep their cells from drying out, but they need water to move nutrients and raw. The Effect of Water Stress on Leaf Respiration. Respiration rates are presented per unit leaf area for comparison with rates of A N (Fig.

2).Respiration averaged μmol O 2 m −2 s −1 in control and mildly water-stressed plants. Under severe water stress, respiration was slightly lower ( μmol O 2 m −2 s −1), although not significantly the best of our knowledge, no.

Photosynthesis involves the use of energy from sunlight, water and carbon dioxide to produce glucose and oxygen. Cellular respiration uses glucose and oxygen to produce carbon dioxide and water.

To emphasize this point even more, the equation for photosynthesis is the opposite of cellular respiration. The Effect of Water Stress on the Rates of Photosynthesis and Respiration in Tomato Plants and Loblolly Pine Seedlings. Holger Brix. Department of Botany, Duke University, Durham, North Carolina.

Search for more papers by this author. Holger Brix. The relationship between water stress and rates of net photosynthesis, respiration, and transpiration was determined for four Abies species native to Canada. Net photosynthesis, after an initial optimum rate, declined in three phases as water stress increased, viz.

a rapid linear rate of decline, a second more gradual reduction and, finally, a steady rate of zero net photosynthesis. Sweetgum (Liquidambar styraciflua L.) is an important tree throughout its native range both for commercial and ornamental use and it has been widely planted elsewhere as a shade t.

Water stress has negative effects on dark reaction of photosynthesis. It stress also disturb the cyclic and non-cyclic type of electron transport chain. The disruption is clearer in the transfer of electron from P ATP formed as well as NADP+ reduction.

Photosystem-I (PS I) of some plants are more severely damaged compared to photosystem-II. Of the two climate and two soil parameters that we tested, both soil pH and %clay explained most of the variability in eCO 2 effects on soil respiration, although only the relationship with %clay was significant (P =Table ).When we included both N fertilized and non-N fertilized sites in the regression, the increase in soil respiration in response to eCO 2 increased with increased.

The water stress-induced limitation on plant growth is mainly caused by reductions in plant carbon balance, which depends on the balance between photosynthesis and respiration (Flexas et al., a). The response of photosynthesis to water stress has.

as well as photosynthesis. Respiration uses oxygen and produces carbon dioxide. Below is a graph measuring the rate of photosynthesis plotted on carbon dioxide against light intensity. Combined effects of water stress and high temperature on photosynthesis, nitrogen metabolism and lipid peroxidation of a perennial grass Leymus chinensis.

Planta – /s [Google Scholar] Xu Z. Z., Zhou G. 13 C‐labelling was used to study carbon partitioning in two lupin species, L. albus and L mutabilis, during a 20‐d water‐stress period initiated 10 d after anthesis (pre‐dawn water potential decreased to approx.

–065 MPa by the end of the drought period). Sampling was carried out at three dates: (1) immediately after labelling, just. The effects of the life processes of plants on the growth rate of the crop, and the quality and quantity of the yield were determined using two different methods.

On photosynthesis and respiration, corn plants (Zea mays) on their silk stage or. It is of theoretical as well as practical interest to identify the components of the photosynthetic machinery that govern variability in photosynthesis rate (A) and water-use efficiency (WUE), and to define the extent by which the component processes limit A and WUE during developing water-deficit stress.

For that purpose, leaf exchange of CO2 and H2O was determined in two growth-chamber-grown. Respiration occurs in your cells and is fueled by the oxygen you inhale. The carbon dioxide gas you exhale is the result of a completed cycle of cellular respiration.

Only plants can photosynthesize, but both plants and animals depend on respiration to release the chemical potential energy originally captured through photosynthesis. Received for publication December 9, Accepted Plant Physiol.

()/92/1 00//07/$/0 Effects of Water-Deficit Stress on Photosynthesis, Its Components and Component Limitations, and on Water Use Efficiency in Wheat (Triticum aestivum L.)' Bjorn Martin* and Norma A. Ruiz-Torres Department of Agronomy, Oklahoma State University.

All living things use a process called respiration to get energy to stay alive. Cellular respiration in plants is the process used by plants to convert nutrients obtained from soil into energy which fuels the plants’ cellular activities. On the other hand, photosynthesis is the process where light energy is converted into chemical energy stored in glucose that can later be used in respiration.

Photosynthesis is the complementary chemical reaction to respiration, meaning that plants need water and carbon dioxide to produce their energy. If we were to breathe in close quarters with plants. 1. To test several hypotheses about acclimation and adaptation of photosynthesis and respiration to differing light conditions, we investigated the interspecific relationships between leaf and root metabolism, chemistry and morphology in high and low light conditions for young seedlings of nine boreal tree species that differ in relative growth rate (RGR).

Effect of Light, Temperature and Water Stress on Net Photosynthesis in Two Popula- tions of Honey Mesquite J.D. HANSON Abstract Net carbon dioxide assimilation rates (PN) were measured for individuals from two Texas honey mesquite populations grown under controlled water stress, temperature, and light treatments.

In this study, we develop a mechanistic understanding of how temperature affects growth and photosynthesis in 10 geographically and physiologically diverse strains of Synechococcus spp. We found that Synechococcus spp. are able to regulate photochemistry over a range of temperatures by using state transitions and altering the abundance of photosynthetic proteins.

Photosynthesis, respiration, and membrane permeability were all more sensitive to heat damage in A. sabulosa than in T. oblongifolia. In both species, however, photosynthesis was more sensitive to heat stress than either of the other two processes, and photosynthesis was completely inhibited at temperatures that were noninjurious to respiration.

Photosynthesis and respiration were measured across a range of cuvette temperatures to assess physiological acclimation and pre-existing genetic adaptation. The temperature response curves of photosynthesis had no sharp optima, but rates declined above 31{degrees}C.

Curves did not differ with geographic source. Algal studies remain necessary for risk assessment and their utility in ecotoxicology is the evaluation of lethal and sub-lethal toxic effects of potential toxicants on inhabitants of several ecosystems.

Effects on algal photosynthetic apparatus caused by various chemical species have been extensively studied. The present chapter summarizes the published data concerning the toxicity of.

Table 1 Combined effects of warming and water availability on light-saturated photosynthesis, apparent quantum yield, light compensation point, light saturated point and dark respiration in leaves.

Photosynthesis And Cellular Respiration. Photosynthesis Words | 5 Pages. Photosynthesis and Cellular Respiration Photosynthesis and respiration are reactions that complement each other in the environment. In reality, they are the same reactions, but they occur in reverse.

During photosynthesis, carbon dioxide and water yield glucose and. Fig. A, Schematic of the basic responses of actual photosynthetic rate (A) in air ( µmol CO 2 m –2 s –1) and potential photosynthetic rate (A pot) measured at elevated CO 2 concentration, to relative water content (RWC).Type 1 and 2 responses of A pot are shown.

In the Type 1 response, A pot is unaffected until a 20–30 % decrease in RWC occurs, when it becomes. El Nino is caused when the winds that push the water get weaker. Due to the weaker winds, the warm water that has been accumulated in the west comes back towards the east.

At the same time, sufficient cold water is not pulled up from the bottom. These two factors contribute to the warming up of the water and the growth of El Nino.

Photosynthesis is, for lack of a better explanation, how plants and some other organisms "eat." Photosynthesis is the process in green plants by which they create carbohydrates (and the sugar glucose) by absorbing carbon dioxide from the air and water from the soil.These results suggest that even a short-term water stress during the S1, S2 and S4 stages mitigated, with respect to the root activity, the negative effect of drought and enhanced leaf photosynthesis compensatory effects of rewatering in order to increase cotton WUE with drip irrigation under mulch in .Energy efficiency of photosynthesis.

The energy efficiency of photosynthesis is the ratio of the energy stored to the energy of light absorbed. The chemical energy stored is the difference between that contained in gaseous oxygen and organic compound products and the energy of water, carbon dioxide, and other amount of energy stored can only be estimated because many products are.

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