Effect of Cadmium on Some of the Biochemical and Physiological Processes in Bean Plants

2006 ◽  
Vol 1 (2) ◽  
pp. 177-184 ◽  
Author(s):  
Khadijeh Bavi . ◽  
Bahman Kholdebarin . ◽  
Ali Moradshahi .
Keyword(s):  
Physiological Processes ◽  
Bean Plants

scholarly journals Studies on the interaction of growth regulators with potassium ions in some physiological processes in bean (Phaseolus vulgaris L.). III The effect of growth regulators on growth, chlorophyll level and transpiration depending on potassium concentration

2014 ◽  
Vol 55 (4) ◽  
pp. 577-588
Author(s):  
Jadwiga Stopińska
Keyword(s):  
Growth Regulators ◽  
Potassium Concentration ◽  
Leaf Growth ◽  
Inhibitory Effect ◽  
Physiological Effect ◽  
Potassium Ions ◽  
Phaseolus Vulgaris L ◽  
Physiological Processes ◽  
Bean Plants ◽  
Chlorophyll Level

Leaf growth and chlorophyll level in GA<sub>3</sub>-treated bean, and leaf growth and transpiration intensity in ABA-treated bean plants were studied at two potassium concentrations in the medium (1 and 3 mM KNO<sub>3</sub>). The plants were grown on Hoagland's solution and growth regulators were applied to the shoot growth apexes. Both GA<sub>3</sub> and K<sup>+</sup> ions were found to stimulate growth of primary leaves and increase their potassium amount. GA<sub>3</sub> contrary to K<sup>+</sup> slightly decreased the potassium content in leaves Both factors reduced the chlorophyll content but did not affect the total chlorophyll amount in these organs Interaction between GA<sub>3</sub> and K<sup>+</sup> ions was of additive nature. The effect of ABA and K<sup>+</sup> ions on growth of both kinds of leaves and on the amount and content of potassium in them were antagonistic. The inhibitory effect of the hormone was stronger at higher potassium concentration in the medium. Either factor reduced transpiration intensity in leaves, however, the inhibitory effect of the growth regulator was stronger at lower potassium concentration. The potassium level modified both the physiological effect of the regulators and the sensitivity of bean particularly to ABA.

scholarly journals Soil organic matter influences cerium translocation and physiological processes in kidney bean plants exposed to cerium oxide nanoparticles

2016 ◽  
Vol 569-570 ◽  
pp. 201-211 ◽  
Author(s):  
Sanghamitra Majumdar ◽  
Jose R. Peralta-Videa ◽  
Jesica Trujillo-Reyes ◽  
Youping Sun ◽  
Ana C. Barrios ◽  
...  
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Cerium Oxide ◽  
Kidney Bean ◽  
Cerium Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
Physiological Processes ◽  
Bean Plants

scholarly journals Studies on the interaction of growth regulators with potassium ions in some physiological processes in the bean (Phaseolus vulgaris L.). I. The effect of growth regulators on the growth of leaves and on the potassium level in leaves and roots

2014 ◽  
Vol 55 (2) ◽  
pp. 199-207
Author(s):  
Anna Stępińska
Keyword(s):  
Phaseolus Vulgaris ◽  
Growth Regulators ◽  
Potassium Level ◽  
Water Solution ◽  
Potassium Ions ◽  
Phaseolus Vulgaris L ◽  
Physiological Processes ◽  
Bean Plants ◽  
Leaves And Roots ◽  
Uptake And Transport

Bean plants were cultured on Hoagland's water solution for one or eight days. The following growth regulators: kinetin (10<sup>-7</sup> M), GA<sub>3</sub> (10<sup>-6</sup> M), IAA (10<sup>-6</sup> M) or ABA (5 x 10<sup>-5</sup> M) were introduced into solutions for 24h. The regulators were found to have a different effect on the potassium level in leaves and roots depending on whether it was assessed I or 8 days after treatment. The mechanism by which growth regulators affect the processes of ion uptake and transport and their relation to growth are discussed.

scholarly journals Preliminary investigation on the interaction between some physiological processes in donors and acceptors of assimilates

2015 ◽  
Vol 42 (1) ◽  
pp. 143-162 ◽  
Author(s):  
Z. Starck
Keyword(s):  
Photosynthetic Activity ◽  
Dark Respiration ◽  
Sugar Content ◽  
Preliminary Investigation ◽  
Extended Period ◽  
Natural Light ◽  
Light Conditions ◽  
Physiological Processes ◽  
Bean Plants ◽  
P Absorption

The interaction between physiological processes in donors and acceptors of <sup>14</sup>C-assimilates was studied in sunflower and bean plants with temporarily limited supply of assimilates (shading a few days and then replacing in natural light conditions (NL)). An extended period of shading (4-7 days) affected growth of plants and reduced photosynthetic activity, especially in sunflower. The proportion of <sup>14</sup>C-transported to roots decreased and that to the stern increased as an effect of preshading and did not significantly change in plants replaced in natural light conditions a few days before <sup>14</sup>CO<sub>2</sub>-exposure. In preshaded blades and roots the rate of dark respiration decreased, but soon improved after a few days of NL conditions following the shading period. Absorption of <sup>32</sup>P coincided with root respiration and sugar content in bean plant, in contrast to sunflower where <sup>32</sup>P-absorption, calculated per l g of root dry matter in preshaded plants exceeded that in control ones.

Localization of Adenosine Triphosphatase Activity in the Phleom of Nicotiana Tabacum

1972 ◽  
Vol 30 ◽  
pp. 230-231
Author(s):  
James Cronshaw ◽  
Jamison E. Gilder
Keyword(s):  
Plasma Membrane ◽  
Atpase Activity ◽  
Adenosine Triphosphatase ◽  
Higher Plants ◽  
High Surface ◽  
Root Tip ◽  
Animal Cells ◽  
Physiological Processes ◽  
Tip Cells ◽  
Atpase Localization

Adenosine triphosphatase (ATPase) activity has been shown to be associated with numerous physiological processes in both plants and animal cells. Biochemical studies have shown that in higher plants ATPase activity is high in cell wall preparations and is associated with the plasma membrane, nuclei, mitochondria, chloroplasts and lysosomes. However, there have been only a few ATPase localization studies of higher plants at the electron microscope level. Poux (1967) demonstrated ATPase activity associated with most cellular organelles in the protoderm cells of Cucumis roots. Hall (1971) has demonstrated ATPase activity in root tip cells of Zea mays. There was high surface activity largely associated with the plasma membrane and plasmodesmata. ATPase activity was also demonstrated in mitochondria, dictyosomes, endoplasmic reticulum and plastids.

A Scanning Electron Microscopic Study of Pro-Vascular Cellular Morphology in Chaetophora Incressata

1985 ◽  
Vol 43 ◽  
pp. 638-639
Author(s):  
A. E. Hotchkiss ◽  
A. T. Hotchkiss ◽  
R. P. Apkarian
Keyword(s):  
Green Algae ◽  
Vascular Plants ◽  
Vascular System ◽  
Higher Plants ◽  
Wall Structure ◽  
Electron Microscopic ◽  
Physiological Processes ◽  
Scanning Electron Microscopic Study ◽  
Scanning Electron Microscopic ◽  
Scanning Electron

Multicellular green algae may be an ancestral form of the vascular plants. These algae exhibit cell wall structure, chlorophyll pigmentation, and physiological processes similar to those of higher plants. The presence of a vascular system which provides water, minerals, and nutrients to remote tissues in higher plants was believed unnecessary for the algae. Among the green algae, the Chaetophorales are complex highly branched forms that might require some means of nutrient transport. The Chaetophorales do possess apical meristematic groups of cells that have growth orientations suggestive of stem and root positions. Branches of Chaetophora incressata were examined by the scanning electron microscope (SEM) for ultrastructural evidence of pro-vascular transport.

Ambulatory Assessment

2009 ◽  
Vol 14 (2) ◽  
pp. 109-119 ◽  
Author(s):  
Ulrich W. Ebner-Priemer ◽  
Timothy J. Trull
Keyword(s):  
Real Time ◽  
Clinical Psychology ◽  
Real Life ◽  
Ambulatory Assessment ◽  
Computer Assisted ◽  
Affective Valence ◽  
Time Data ◽  
Physiological Processes ◽  
Context Specific ◽  
Questionnaire Studies

Convergent experimental data, autobiographical studies, and investigations on daily life have all demonstrated that gathering information retrospectively is a highly dubious methodology. Retrospection is subject to multiple systematic distortions (i.e., affective valence effect, mood congruent memory effect, duration neglect; peak end rule) as it is based on (often biased) storage and recollection of memories of the original experience or the behavior that are of interest. The method of choice to circumvent these biases is the use of electronic diaries to collect self-reported symptoms, behaviors, or physiological processes in real time. Different terms have been used for this kind of methodology: ambulatory assessment, ecological momentary assessment, experience sampling method, and real-time data capture. Even though the terms differ, they have in common the use of computer-assisted methodology to assess self-reported symptoms, behaviors, or physiological processes, while the participant undergoes normal daily activities. In this review we discuss the main features and advantages of ambulatory assessment regarding clinical psychology and psychiatry: (a) the use of realtime assessment to circumvent biased recollection, (b) assessment in real life to enhance generalizability, (c) repeated assessment to investigate within person processes, (d) multimodal assessment, including psychological, physiological and behavioral data, (e) the opportunity to assess and investigate context-specific relationships, and (f) the possibility of giving feedback in real time. Using prototypic examples from the literature of clinical psychology and psychiatry, we demonstrate that ambulatory assessment can answer specific research questions better than laboratory or questionnaire studies.

Monitoring of stress related physiological processes in ambulance personnel

2007 ◽  
Author(s):  
N. Kalezic ◽  
U. Aasa ◽  
M. Barnekow-Bergkvist ◽  
E. Lyskov
Keyword(s):  
Ambulance Personnel ◽  
Physiological Processes

Platelet Microtubules in Clot Structure Formation and Contractile Force Generation: Investigation of a Controversy

1986 ◽  
Vol 56 (01) ◽  
pp. 023-027 ◽  
Author(s):  
C J Jen ◽  
L V McIntire
Keyword(s):  
Network Formation ◽  
Contractile Force ◽  
Second Phase ◽  
Clot Retraction ◽  
Forming Process ◽  
Microtubule Organization ◽  
Physiological Processes ◽  
Fibrin Network ◽  
Two Parameters

SummaryWhether platelet microtubules are involved in clot retraction/ contraction has been controversial. To address this question we have simultaneously measured two clotting parameters, clot structural rigidity and isometric contractile force, using a rheological technique. For recalcified PRP clots these two parameters began rising together at about 15 min after CaCl2 addition. In the concentration range affecting microtubule organization in platelets, colchicine, vinca alkaloids and taxol demonstrated insignificant effects on both clotting parameters of a recalcified PRP clot. For PRP clots induced by adding small amounts of exogenous thrombin, the kinetic curves of clot rigidity were biphasic and without a lag time. The first phase corresponded to a platelet-independent network forming process, while the second phase corresponded to a platelet-dependent process. These PRP clots began generating contractile force at the onset of the second phase. For both rigidity and force parameters, only the second phase of clotting kinetics was retarded by microtubule affecting reagents. When PRP samples were clotted by adding a mixture of CaCl2 and thrombin, the second phase clotting was accelerated and became superimposed on the first phase. The inhibitory effects of micro tubule affecting reagents became less pronounced. Thrombin clotting of a two-component system (washed platelets/ purified fibrinogen) was also biphasic, with the second phase being microtubule-dependent. In conclusion, platelet microtubules are important in PRP clotted with low concentrations of thrombin, during which fibrin network formation precedes platelet-fibrin interactions. On the other hand they are unimportant if a PRP clot is induced by recalcification, during which the fibrin network is constructed in the presence of platelet-fibrin interactions. The latter is likely to be more analogous to physiological processes in vivo.

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