Indole Acetic Acid (IAA) Mediated Amelioration of Lead (Pb) Stress- Physiological Indices of Mung Bean [Vigna radiata (L.) Wilczek]

2021 ◽  
Author(s):  
Sana Saleem ◽  
Ghulam Yasin ◽  
Ikram Ul Haq ◽  
Adeela Altaf ◽  
Khalid Hussain ◽  
...  
Keyword(s):  
Acetic Acid ◽  
Stomatal Conductance ◽  
Transpiration Rate ◽  
Mung Bean ◽  
Indole Acetic Acid ◽  
Sandy Loam ◽  
Co2 Concentration ◽  
Pb Stress ◽  
Loam Soil

Background: Heavy metals have their adverse effects on growth and physiology of plant. Plant growth regulators help in improving the growth and physiological phenomenon in plants. A pot culture experiment was devised to explore the ameliorative potential of Indole Acetic Acid (IAA) for toxicity of rhizospheric lead (Pb) on two varieties of Mung bean [Vigna radiate (L.) Wickzek]. Methods: Seeds of two varieties i.e., M- 8 and MN-92 were grown in earthen pots filled with sandy loam soil and were arranged under complete randomization. Fifteen days after germination, the lead (Pb) was added @ 10mg/kg and 20mg/kg soil as solution Pb NO3. Indole Acetic Acid @100.0mM was foliarly sprayed twice at 15 and 30 days of plants emergence. Physiological parameters i.e., Photosynthetic Rate, Transpiration Rate, Stomatal conductance, Sub Stomatal CO2 Concentration and biomass production in the form of stem, root and leaf dry weights were determined at the age of physiological maturity for three replicates. Result: By application of IAA, photostnthetic rate reduction was declined from 24.61% to 17.78% under 10mg Pb stress and from 55.54% to 27.35% under 20mg Pb stress. Stomatal conductance reduction was declined from 0.56% to 0.28% under 10mg Pb stress and from 3.37% to 1.68% under 20mg Pb stress. Alleviation of Pb stress by IAA for transpiration rate was non significant. Similarly, the role of IAA for alleviation of Pb stress in term of dry weights of stem,root and leaves were non significant statistically.

scholarly journals Effect of Sulfur and Clean Salt on Antioxidant Enzymes and Proline Content in Improving Salt Tolerance of Two Lettuce Cultivars Grown in Basrah

2019 ◽  
Vol 32 ◽  
pp. 80-89
Author(s):  
Jameel H. Hiji ◽  
Abbas M. Jasim ◽  
Awatif N. Jerry
Keyword(s):  
Electrical Conductivity ◽  
Antioxidant Enzymes ◽  
Salt Tolerance ◽  
Adverse Effects ◽  
Irrigation Water ◽  
Sandy Loam ◽  
Proline Content ◽  
Salt Tolerant ◽  
Loam Soil

The experiment was conducted during 2017-2018 and 2018-2019 winter seasons at Abu Al-Khaseeb District at basrah /Iraq on sandy loam soil  to study the effect of sulfur at five concentration ( 0 , 500 , 1000, 1500 and 2000) kg. Ha-1, clean salt at three concentration (0, 0.5 and 1.0) ml. L-1, two cultivars of lettuce local and fajr and interaction among them  at electrical conductivity of the irrigation water (7.85 and 9.69) dS.m-1.  Result showed significant reduction in the activity of catalase (CAT) and peroxidase (POD) enzymes and proline content in all treatments of sulfur and clean salt especially at 2000 Kg. Ha-1 sulfur and clean salt at 1.0 ml L-1had significantly decrease in CAT activity (295.80 ? 341.65) U mg–1 FW, POD activity (7.86? 8.98) U mg–1 FW and proline (0.50 ? 0.80) mg g-1DW, comparing with control of CAT activity (663.21, 814.65) U mg–1 FW and POD activity (13.83, 15.52) mg–1 FW and proline (1.19, 2.03) mg g-1DW, respectively for two seasons due to the role of sulfur and clean salt ameliorates the adverse effects of salinity on plants. Fajr lettuce is more salt-tolerant than local due to less antioxidant enzyme levels POD, CAT and proline.

Effect of Flavone from Forestry Waste C.Cathayensis Exocarp on Photosynthetic Characteristics of Crops

2012 ◽  
Vol 550-553 ◽  
pp. 2365-2368
Author(s):  
Xiang Ming Chen
Keyword(s):  
Stomatal Conductance ◽  
Chlorophyll Content ◽  
Photosynthetic Rate ◽  
Transpiration Rate ◽  
Rate Increase ◽  
Co2 Concentration ◽  
Total Chlorophyll ◽  
Photosynthesis Efficiency ◽  
Seedling Leaf ◽  
Intercellular Co2

Using six kinds of concentration (ranged from 0.0 to 2.0mg.L-1) of flavone extract from C.cathayensis exocarp treats corn, soybean, wheat and mung bean seedlings, in order to study the photosynthetic rate, stomatal conductance, transpiration rate, intercellular CO2 on the seedling leaf. Results show that effects of flavone extract (0.1-0.5mg.L-1) increase content of the chlorophyll a, b and total chlorophyll, promote photosynthetic rate, stomatal conductance, transpiration rate, proper increase cell gap inside the CO2 concentration.0.1mg.L-1 treatment effect is the most obvious compare with the control, the total chlorophyll and photosynthetic rate increase by 20.9 % and 21% respectively; More than 0.5mg.L-1, the chlorophyll content, photosynthetic rate, stomatal conductance, transpiration rate decrease, the intercellular CO2 rapid increase. Research shows that, the appropriate concentration of flavone can increase the chlorophyll content in the leaf, promote stomatal opening, increase of intracellular CO2 supply, improve leaf photosynthesis efficiency.

scholarly journals Effect of Biostimulants on Several Physiological Characteristics and Chlorophyll Content in Broccoli under Drought Stress and Re-watering

2017 ◽  
Vol 45 (1) ◽  
pp. 197-202 ◽  
Author(s):  
Alina KAŁUŻEWICZ ◽  
Włodzimierz KRZESIŃSKI ◽  
Tomasz SPIŻEWSKI ◽  
Anna ZAWORSKA
Keyword(s):  
Amino Acids ◽  
Drought Stress ◽  
Stomatal Conductance ◽  
Chlorophyll Content ◽  
Transpiration Rate ◽  
Co2 Concentration ◽  
Ascophyllum Nodosum ◽  
Internal Co2 ◽  
The Many ◽  
Final Effect

Drought stress is one of the many factors that lead to decreased yield in both quality and quantity. One method to improve plant resistance to this stress is application of biostimulants. The most widely used biostimulants are protein hydrolysates, containing sea algae extract and humus compounds. In the present study, the influence of the amino acids as well as combination of amino acids with Ascophyllum nodosum filtrate on broccoli (Brassica oleracea var. italica) plants cvs. ‘Agassi’ and ‘Tiburon’ was investigated. The plants were watered with Ascophyllum nodosum filtrate three days before planting and sprayed three times with amino acids two, four and six weeks after planting. The present results show that biostimulants have a significant effect on both gas exchange and transpiration rate both prior to the application of stress, under drought stress and after re-watering. Biostimulant treatment led to an increase of drought tolerance in both studied cultivars but the final effect depended on cultivar. ‘Tiburon’ cultivar turned out to be more tolerant to drought stress than ‘Agassi’. The application of biostimulants resulted in an increase of photosynthetic rate, stomatal conductance, internal CO2 concentration and transpiration rate in ‘Agassi’ cultivar under drought stress. This effect was not observed in ‘Tiburon’. The chlorophyll content was higher under drought stress as compared to the value prior to stress in both cultivars.

scholarly journals Indole acetic acid is responsible for protection against oxidative stress caused by drought in soybean plants: The role of heme oxygenase induction

Redox Report ◽  
2014 ◽  
Vol 19 (6) ◽  
pp. 242-250 ◽  
Author(s):  
Manuel López Lecube ◽  
Guillermo O. Noriega ◽  
Diego M. Santa Cruz ◽  
María L. Tomaro ◽  
Alcira Batlle ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Acetic Acid ◽  
Heme Oxygenase ◽  
Indole Acetic Acid ◽  
Soybean Plants
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