Selected physiological responses of kudzu to different chromium concentrations

2001 ◽  
Vol 81 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Shounda L. Connell ◽  
Safaa H. Al-Hamdani
Keyword(s):  
Carbon Dioxide ◽  
Physiological Responses ◽  
Carbohydrate Accumulation ◽  
Key Words Carbohydrate ◽  
Chlorophyll A And B ◽  
Cr Concentration ◽  
Chromium Uptake ◽  
Potential Use ◽  
Cr Uptake ◽  
Cr Contamination

This study was designed to evaluate the potential use of kudzu (Pueraria montana var. lobata) as a phytoremediator to reduce Cr (VI) contamination. In addition, the effect of Cr concentrations of 4, 8, and 12 mg L–1 on kudzu growth, gas exchange, pigment concentration, and carbohydrate accumulation were evaluated. In general, Cr uptake by kudzu was increased as Cr concentration increased in the growing media. Most of the Cr taken up by kudzu was accumulated in the root as indicated by the significantly higher ratio of root/shoot Cr concentrations at increasing Cr levels in the root environment. Kudzu growth, photosynthetic rate, and chlorophyll a and b concentrations declined as the Cr concentration increased. The decrease in photosynthesis was independent of the internal carbon dioxide. Anthocyanin was found to increase as Cr concentration gradually increased from 4 to 12 mg L–1. Kudzu clearly demonstrated its ability to survive at Cr concentrations up to 8 mg L–1 in the root environment. Kudzu, therefore, can be considered as a replacement crop in areas of Cr contamination falling within the concentration range of this study. Key words: Carbohydrate, chromium uptake, photosynthesis, phytoremediation

scholarly journals Growth, histochemical and physiological responses of non-edible oil producing plant (Reutealis trisperma) to gold mine tailings

2018 ◽  
Vol 19 (4) ◽  
pp. 1294-1302 ◽  
Author(s):  
MUHAMMAD HILMI ◽  
HAMIM HAMIM ◽  
YOHANA C. SULISTYANINGSIH ◽  
TAUFIKURAHMAN TAUFIKURAHMAN
Keyword(s):  
Mine Tailings ◽  
Shoot Growth ◽  
Physiological Responses ◽  
Gold Mine ◽  
Histochemical Analysis ◽  
Root And Shoot Growth ◽  
Gold Mine Tailings ◽  
Chlorophyll A And B ◽  
Anatomical Characters ◽  
High Level

Hilmi M, Hamim H, Sulistyaningsih YC, Taufikurahman. 2018. Growth, histochemical and physiological responses of nonedibleoil producing plant (Reutealis trisperma) to gold mine tailings. Biodiversitas 19: 1294-1302. Reutealis trisperma (Blanco) AiryShaw is a non-edible biodiesel producing plant that is able to grow well in various unfavorable environmental conditions. The studyaimed to analyze the growth, physiological, and anatomical responses of R. trisperma to gold mine tailings. Three-month-old of R.trisperma were grown in 8 kg of polybags contained with mixed soil-compost medium treated with 0, 25, 50 and 100% of gold minetailings for 3 months. Root and shoot growth, physiological and anatomical characters, and histochemical analysis of Pb inside the rootsand leaves were examined. The root and shoot growth as well as chlorophyll a and b contents of R. trisperma grown in sole gold minetailing at 100% significantly decreased, while at the lower concentration of gold mine tailings, the decrease of the growth performanceswas not significant, or even increased shown in that of 25% of tailing treatment. The treatment of gold mine tailing at 100% alsoinduced lipid peroxidation, indicated by the significant increase in malondialdehyde (MDA) contents in the root as well as the leaves.Histochemical analysis showed that accumulation of Pb occurred both in roots as well as in leaves of R. trisperma treated with 100% oftailings. High-level tailing treatment also induced anatomical alteration in roots as well as leaves of the species. These results indicatedthat gold mine tailings induced oxidative stress in roots and leaves of R. trisperma resulted in growth inhibition.

Physiological Responses to Elevated Carbon Dioxide Levels in Buildings

1997 ◽  
Vol 6 (5) ◽  
pp. 301-308 ◽  
Author(s):  
Saul Stricker ◽  
Marc Bourgeau ◽  
Eric Fonberg ◽  
Denis Parent
Keyword(s):  
Carbon Dioxide ◽  
Physiological Responses ◽  
Elevated Carbon Dioxide ◽  
Carbon Dioxide Levels

scholarly journals The role of carbon dioxide in nematode behaviour and physiology

Parasitology ◽  
2019 ◽  
Vol 147 (8) ◽  
pp. 841-854 ◽  
Author(s):  
Navonil Banerjee ◽  
Elissa A. Hallem
Keyword(s):  
Carbon Dioxide ◽  
Neural Circuit ◽  
Physiological Responses ◽  
Life Stage ◽  
Free Living ◽  
Behavioural Responses ◽  
Wide Range ◽  
Sensory Cue ◽  
Context Dependent

AbstractCarbon dioxide (CO2) is an important sensory cue for many animals, including both parasitic and free-living nematodes. Many nematodes show context-dependent, experience-dependent and/or life-stage-dependent behavioural responses to CO2, suggesting that CO2 plays crucial roles throughout the nematode life cycle in multiple ethological contexts. Nematodes also show a wide range of physiological responses to CO2. Here, we review the diverse responses of parasitic and free-living nematodes to CO2. We also discuss the molecular, cellular and neural circuit mechanisms that mediate CO2 detection in nematodes, and that drive context-dependent and experience-dependent responses of nematodes to CO2.

scholarly journals Supercritical Carbonation of Lightweight Aggregate Containing Mortar: Thermal Behavior

2014 ◽  
Vol 600 ◽  
pp. 345-356
Author(s):  
Marçal Rosas Florentino Lima Filho ◽  
Sandro Marden Torres ◽  
Leon Black ◽  
Andressa de Araújo Porto Vieira ◽  
Rodinei Medeiros Gomes ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Thermal Conductivity ◽  
Supercritical Carbon Dioxide ◽  
Thermal Behavior ◽  
Lightweight Concrete ◽  
Lightweight Aggregate ◽  
Mix Design ◽  
Lightweight Aggregates ◽  
Cylindrical Samples ◽  
Potential Use

Lightweight concrete shows good insulation properties, depending on several parameters such as mix design and aggregate type. Perlite aggregate is one of the most effective aggregates for such a purpose, mainly because of its low thermal conductivity (0.04 W/m.°C), but is not available globally. This paper explores the potential use of another source of thermal efficient aggregate, vermiculite (0.058 W/m.°C) which is available in Brazil and other countries where perlite is absent. Cylindrical samples were cast by using two lightweight aggregates, perlite and vermiculite, and treated with supercritical carbon dioxide. Supercritical carbonation (SCC) of concrete can improve mechanical, thermal and durability features. In this paper, the effect of SCC on the thermal behavior of lightweight mortars was investigated with regards to physical and microstructure features and thermal behavior due to cooling.

Physiological responses to carbon dioxide in embryonic red-eared slider turtles,Trachemys scripta

1992 ◽  
Vol 264 (1) ◽  
pp. 1-10 ◽  
Author(s):  
Cory R. Etchberger ◽  
Michael A. Ewert ◽  
John B. Phillips ◽  
Craig E. Nelson ◽  
Henry D. Prange
Keyword(s):  
Carbon Dioxide ◽  
Physiological Responses ◽  
Trachemys Scripta

Putting the fizz into chemistry: applications of supercritical carbon dioxide in tissue engineering, drug delivery and synthesis of novel block copolymers

2007 ◽  
Vol 35 (3) ◽  
pp. 516-521 ◽  
Author(s):  
H. Tai ◽  
V.K. Popov ◽  
K.M. Shakesheff ◽  
S.M. Howdle
Keyword(s):  
Carbon Dioxide ◽  
Drug Delivery ◽  
Tissue Engineering ◽  
Block Copolymers ◽  
Supercritical Carbon Dioxide ◽  
Drug Carriers ◽  
Controlled Polymerization ◽  
Polymeric Scaffolds ◽  
Potential Use ◽  
Supercritical Carbon

This paper describes the recent progress at Nottingham towards the exploitation of the unique properties of scCO2 (supercritical carbon dioxide) for the preparation of polymeric scaffolds for tissue engineering applications and new devices for controlled drug delivery, as well as the synthesis of novel block copolymers by the combination of eROP (enzymatic ring opening polymerization) and controlled polymerization methods for the potential use as drug carriers.

scholarly journals The Growth Improvement of Grammatophyllum scriptum (Lindl.) Bl. In Vitro Plantlet using Photoautotrophic Micropropagation System

2017 ◽  
Vol 21 (2) ◽  
pp. 109 ◽  
Author(s):  
Aries Bagus Sasongko ◽  
Asruwaidah Fatumi ◽  
Ari Indrianto
Keyword(s):  
Carbon Dioxide ◽  
Root Length ◽  
Unit Area ◽  
Leaf Length ◽  
Growth Increase ◽  
Photoautotrophic Micropropagation ◽  
Average Quantity ◽  
Chlorophyll A And B ◽  
Number Of Leaves

To improve the growth of Grammatophyllum scriptum (Lindl.) Bl. in vitro plantlet, a photoautotrophic micropropagation system (PMS) was developed by growing in vitro plantlet on VW medium with varying concentration of sucrose (0, 5, 10, and 20 g/L) and additional carbon dioxide from the air (bottle covered with cap or filter). The result showed that the leaf length would increase up to 6.5 cm with PMS and it would keep growing by the adding of 5 g/L sucrose. Average number of leaves increased by 6.7 strands with PMS and the addition of sucrose increased the average quantity of leaves up to 7.7 strands. Average number and root length would increase with PMS and would even increase more with 5 g/L sucrose addition. PMS with 5 g/L sucrose can increase chlorophyll a and b concentration. The number of stomata per unit area in PMS was lower than closed culture. This shows that PMS can increase the growth of G. scriptum in vitro plantlet and the growth increase would be effective if it is combined with sucrose addition.

scholarly journals Effect of the Elevated Carbon Dioxide on the Growth and Physiological Responses of Peach ‘Mihong’

2021 ◽  
Vol 30 (4) ◽  
pp. 312-319
Author(s):  
Seul Ki Lee ◽  
Jung Gun Cho ◽  
Jae Hoon Jeong ◽  
Suhyun Ryu ◽  
Jeom Hwa Han ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Physiological Responses ◽  
Elevated Carbon Dioxide

Welfare of recently weaned piglets transported on unpaved roads: the effect of age and the use of straw bedding

2015 ◽  
Vol 55 (5) ◽  
pp. 648 ◽  
Author(s):  
P. Roldan-Santiago ◽  
D. Mota-Rojas ◽  
H. Orozco-Gregorio ◽  
F. Borderas-Tordesillas ◽  
R. Martínez-Rodríguez ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Physiological Responses ◽  
Total Carbon ◽  
Stressful Situation ◽  
Weaned Piglets ◽  
Unpaved Roads ◽  
Blood Concentrations ◽  
Partial Pressures ◽  
Transport Vehicle ◽  
Lactate Levels

This study evaluated the physiological responses of piglets weaned at three different ages and transported immediately over unpaved roads with and without the use of straw bedding in the transport vehicle. The study included 270 hybrid piglets born of York–Landrace dams and Pietrain sires. The piglets were weaned and then transported at 8 days old (n = 90), 15 days old (n = 90) or 22 days old (n = 90). The duration of each trip, from the time the transport vehicle left the original site until its arrival at the destination (site 2) on the same farm, was 1 h. The piglets in each one of the three groups were divided into two subgroups: (1) transported over unpaved roads with straw bedding; (2) transported over unpaved roads without straw bedding. Three repetitions were performed for each experimental condition. To assess physiological responses to the stress caused by transport, blood samples were taken as soon as the piglets arrived at site 2. The blood variables evaluated were: pH, haematocrit (%), glucose (mg/dL), electrolytes (Na+, K+ and Ca2+) (mmol/L), lactate levels (mg/dL), partial pressures of carbon dioxide (pCO2) and oxygen (pO2) (mm Hg), bicarbonate (HCO3–), and total carbon dioxide (TCO2C). Piglets that were weaned at 8 and 15 days of age and then transported without straw bedding were found to be more susceptible to metabolic, acid–base, hydric, and gas exchange imbalances (P < 0.05). Blood concentrations of pO2, Na+, K+, Ca2+ and pH were not affected by transport in piglets weaned at 22 days of age in vehicles using straw bedding. Hence, we conclude that regardless of age and trip conditions, the transport of recently weaned piglets constitutes a stressful situation, because just 1 h of transport time was sufficient to cause imbalances in their physiological blood indicators.

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