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Saturday, July 25, 2020 | History

2 edition of sensitivity of photosynthesis to water stress and oxygen found in the catalog.

sensitivity of photosynthesis to water stress and oxygen

Ziyu Dai

sensitivity of photosynthesis to water stress and oxygen

gas exchange, fluorescence and biochemical analysis

by Ziyu Dai

  • 276 Want to read
  • 13 Currently reading

Published .
Written in English

    Subjects:
  • Photosynthesis.,
  • Plants -- Effect of light on.,
  • Plant physiology.

  • Edition Notes

    Statementby Ziyu Dai.
    The Physical Object
    Paginationxiv, 213 leaves, bound :
    Number of Pages213
    ID Numbers
    Open LibraryOL14704515M

      Exploring the Sensitivity of Photosynthesis and Stomatal Resistance Parameters in a Land Surface Model () considered 66 parameters, five of which were associated with plant physiology, and found that photosynthesis estimates were sensitive to two plant They found that mp remained constant throughout periods of water stress and high Cited by: Severe water stress limits photosynthesis, and can delay ripening, reduce bud fruitfulness, reduce winter hardiness, and result in sudden vine collapse. How does water move through vines? Water is taken up by the roots and moved through the xylem tissues (the pipeline) to leaves through water pressure differences.

    Heat stress affects the metabolism and structure of plants, especially cell membranes and many basic physiolo-gical processes such as photosynthesis, respiration and water relations (Wahid et al. ). Reduction of photosyn-thesis by HT stress appears to be a major factor that im-poses source limitation to yield formation. Calvin cycle re-File Size: KB.   Our objective was to determine the sensitivity of components of the photosynthetic apparatus of maize (Zea mays), a C4 plant, to high temperature stress. Net photosynthesis (Pn) was inhibited at leaf temperatures above 38°C, and the inhibition was much more severe when the temperature was increased rapidly rather than gradually.

    The photosynthetic oxygen evolution increased by about 30% over control when Dunaliella tertiolecta and its salt-sensitive mutant (HL 25/8) were stressed by raising NaCl concentration from to M, however, during the dilution stress the photosynthetic oxygen evolution was progressively decreased with increasing dilution (decreasing the salinity). The photosynthetic oxygen evolution is affected by the water Cited by: Chapter Photosynthesis in higher plants of Biology book - PHOTOSYNTHESISIN HIGHER PLANTS Another experiment you may have carried out is the half-leaf experiment, where a part of a leaf is enclosed in a test tube containing some KOH soaked cotton (which absorbs CO2), while the other half is exposed to air. The setup is then placed in light for some time.


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Sensitivity of photosynthesis to water stress and oxygen by Ziyu Dai Download PDF EPUB FB2

Water stress substantially alters plant metabolism, decreasing plant growth and photosynthesis 1,2,3,4 and profoundly affecting ecosystems and agriculture, and Cited by: Photosynthesis in C4 plants is more sensitive to water stress such as corn (zea mays L.) and C3 plants is less susceptible to water deficiency such as wheat.

C4 plants are in hot, arid region areas prone to frequent drought. The process of photosynthesis is take place in the chloroplast, which contain green pigment known as chlorophyll. Photosynthesis, Stomatal Conductance and Leaf Water Potential during Water Stress Situations in Young Rubbertrees (Hevea brasiliensis) Under Tropical.

The sensitivity of photosynthesis to O 2 and CO 2 concentration identifies strong Substituting Eqns 2,3, or 4 for the gross CO 2 assimilation rate (A + R d) in Eqn 11 gives the oxygen sensitivities of ETR for the Rubisco and RuBP The plants were grown in sandy‐loam soil and were watered regularly to avoid water stress.

The most sensitive part of PS II is the metal centre at the oxygen-evolving complex. Its high sensitivity is asso ciated with the Mn cluster, which forms stable metal centres with high oxidation states of Mn (III or IV). A still higher oxidation state (V) may be formed during the oxidation of water.

Stress may lead to the production of a. Gene structures and expression control of active oxygen scavenging enzymes in rice (Kunisuke Tanaka). Photooxidative stress sensitivity of transgenic plants containing altered levels of active oxygen scavenging enzymes (Kiyoshi Tanaka, Takao lgarashi, Mitsuko Aono, Akihiro Kubo).

Part Two: High and Low Temperature Stresses. Uprety D.C. and Sirohi G.S. () Effect of water stress on photosynthesis and water relations of wheat varieties. Indian J Plant Physiol – Google Scholar Uprety D.C. and Sirohi G.S. () Comparative study on the effect of water stress on photosynthesis and water Cited by: During drought or high-light stress, the low intercellular CO 2 due to stomatal closure, and increased energy dissipation lead to a reduction in photosynthesis (Ashraf and Harris, ).

Much of the damage caused by stress exposure is due to oxidative damage at the cellular level, characterized by increased reactive oxygen species (ROS) and. The influence of water stress on photosynthesis in a barley crop.- Effects of water stress on CO2 exhange in apple.- Plant relation to heat stress at low oxygen and high CO2-concentration.- Chilling-induced inhibition of photosynthesis in tomato.- Molecular species of phosphatidylglycerols associated with the chilling sensitivity of.

This volume contains the papers, presented during a conference, organized jointly by the "Opzoekingsstation van Gorsem" and the "Limburgs Universitair Centrum", Belgium from 22 to 27 August For this third meeting, the chosen topic was the effect of different stresses on photosynthesis.

These findings suggested that differential sensitivity of C3 and C4 plants to water stress appear to be partially governed by their ability to counter oxidative stress, pertinently involving. Water stress is one of the most important factors inhibiting the growth and photosynthetic abilities of plants through disturbing the balance between the production of reactive oxygen species and the antioxidant defense, causing accumulation of reactive oxygen species which induce oxidative stress to proteins, membrane lipids, and other cellular components.

thesis is equally or even more sensitive to water stress than its C3 counterpart in spite of the greater capacity and water use efficiency of the C4 photosynthetic pathway.

Key words: C3 and C4 photosynthesis, stomatal and non-stomatal limitation, high C02, water stress. INTRODUCTION Water stress is one of the most limiting environmental factors to. Proline, an imino acid, is widely regarded as a main osmoprotectant in water stress tolerance in plants.

In the present study with the plants at the vegetative stage, we found that water stress does not trigger enhanced proline synthesis (Figure 1d, h). In contrast, when the drought treatment was imposed during the flowering stage, there was a considerable increase in proline levels in the leaves.

photosynthesis Photosynthesis II: Dissolved O2 Measuring dissolved oxygen inside an active photosynthetic system. value of dissolved oxygen than “only water” because of the presence of the plant. This means that there is a minimum oxygen production by the plant.

Conclusions. PDF | On Jan 1,H. Athar and others published Photosynthesis under drought stress | Find, read and cite all the research you need on ResearchGate. 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 conditions.

These findings demonstrated that nitrogen deposition may significant alter the susceptibility of C3 and C4 grass species to drought stress and re-watering, highlighting the asymmetry between.

Accurately predicting photosynthesis in response to water and nitrogen stress is the first step toward predicting crop growth, yield and many quality traits under fluctuating environmental conditions.

While mechanistic models are capable of predicting photosynthesis under fluctuating environmental conditions, simplifying the parameterization procedure is important toward a wide range of model Cited by: 1. A fundamental challenge in plant physiology is independently determining the rates of gross O2 production by photosynthesis and O2 consumption by respiration, photorespiration, and other processes.

Previous studies on isolated chloroplasts or leaves have separately constrained net and gross O2 production (NOP and GOP, respectively) by labeling ambient O2 with 18O while leaf water was. About this book. Photosynthesis is one of the most important processes that affects all life on Earth, and, even now in the twenty-first century, it is still being studied and tested by scientists, chemists, and botanists.

The Multiple Roles of Various Reactive Oxygen Species (ROS) in Photosynthetic Organisms (Pages: ) Franz‐Josef.The most sensitive part of PS II is the metal centre at the oxygen-evolving complex.

Its high sensitivity is asso-ciated with the Mn cluster, which forms stable metal centres with high oxidation states of Mn (III or IV). A still higher oxidation state (V) may be formed during the oxidation of water. Stress. Forests remove about 30% of anthropogenic CO2 emissions through photosynthesis and return almost 40% of incident precipitation back to the atmosphere via transpiration.

The trade-off between photosynthesis and transpiration through stomata, the water-use efficiency (WUE), is an important driver of plant evolution and ecosystem functioning, and has profound effects on by: 7.