scholarly journals Effects of Irrigation Deficit and Application of Some Growth Regulators on Defense Mechanisms of Canola

2015 ◽  
Vol 43 (1) ◽  
pp. 124-130 ◽  
Author(s):  
Seyed Ahmad KALANTAR AHMADI ◽  
Ali EBADI ◽  
Jahanfar DANESHIAN ◽  
Soodabeh JAHANBAKHSH ◽  
Seyed Ataollah SIADAT ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Deficit Irrigation ◽  
Defense Mechanisms ◽  
Agricultural Research ◽  
Foliar Application ◽  
Maximum Activity ◽  
Flowering Stage ◽  
Relative Water ◽  
Irrigation Deficit ◽  
Main Factor

A split-plot experiment arranged in a randomized complete blocks design with three replications was carried out in Safiabad Agricultural Research Center of Dezful in order to investigate the effects of foliar applications of ascorbic acid (AsA), salicylic acid (SA) and methanol (Me), under deficit irrigation conditions, in canola; there were 3 levels of irrigation as the main factor (irrigation after 70 mm evaporation from the pan as control, cessation of irrigation at the flowering stage and cessation of irrigation at the appearance of siliques) and 10 levels of foliar applications as sub-factor (100, 200 and 300 mg.l-1AsA; 100, 200 and 300 µM SA; 10, 20 and 30% (w/v) methanol; and foliar application of distilled water as control). Foliar applications were made during both budding and initiation of flowering stages. Results indicated that antioxidant enzymes showed different responses to deficit irrigation and foliar application treatments. Maximum catalase (CAT) and polyphenol oxidase (PPO) activities were observed under cessation of irrigation at flowering stage and foliar application of 300 µM SA, while ascorbate peroxidase (APX) reached its maximum activity under the same irrigation conditions and foliar application of 300 mg.l-1AsA. SA had more influence to increase in CAT and PPO activity under cessation of irrigation at flowering stage. The relative water content (RWC) was also decreased due to the drought stress caused by the cessation of irrigation. Foliar application of SA (100 μM) and Me (10% w/v) had more influence to maintain RWC compared to ascorbic acid under irrigation cessation at flowering stage.

Effect of foliar application of chelated copper and manganese on yield components and fibre properties of Egyptian cotton (Gossypium barbadense)

1993 ◽  
Vol 121 (2) ◽  
pp. 193-198 ◽  
Author(s):  
Z. M. Sawan ◽  
M. H. Mahmoud ◽  
B. R. Gregg
Keyword(s):  
Yield Components ◽  
Agricultural Research ◽  
Foliar Application ◽  
Field Studies ◽  
Gossypium Barbadense ◽  
Research Centre ◽  
Fibre Properties ◽  
Foliar Sprays ◽  
Egyptian Cotton ◽  
Cotton Cultivar

SUMMARYA decline in supplies of organic manures and the increased use of chemical fertilizers has led to a decrease in the micronutrient content of the soil, with attendant effects on yield.Field studies were conducted in 1986 and 1987 at the Giza Agricultural Research Centre, Egypt, to determine the effect of Cu-EDTA and Mn-EDTA foliar sprays on growth, mineral content, yield components and fibre properties of the Egyptian cotton cultivar Giza 75 (Gossypium barbadense L.).All combinations used significantly increased the uptake of Cu and Mn and the dry matter yield. The earliness of harvest and the value of yield components were all increased by the application of Cu or Mn; 25 mg/1 of both Cu and Mn gave the highest values. Lint percentage and fibre properties were not significantly affected.This study indicated that the yield of cotton, grown under otherwise standard conditions, may be increased by foliar sprays of Cu-EDTA and Mn-EDTA combined.

Effect of foliar application of iron and zinc on performance of transplanted rice in middle Gangetic plains of Bihar

2021 ◽  
Vol 8 (2) ◽  
Author(s):  
MOHAMMAD\ HASHIM ◽  
◽  
V K SINGH ◽  
K K SINGH ◽  
SHIVA DHAR ◽  
...  
Keyword(s):  
Agricultural Research ◽  
Foliar Application ◽  
Block Design ◽  
Indian Agricultural Research Institute ◽  
Ferrous Sulphate ◽  
Growth Yield ◽  
Growth Stages ◽  
Higher Plant ◽  
Gangetic Plains ◽  
Iron And Zinc

A field experiment was conducted during kharif season of 2015 and 2016 at research farmof the ICAR- Indian Agricultural Research Institute Regional Station Pusa, Samastipur, Biharto determine the foliar feeding of micronutrients (iron and zinc at different growth stages)on growth, yield and economics of rice in middle Gangetic plains of Bihar. The experimentwas laid out in randomized block design consisting of 9 treatments with 3 replications. Thetreatments consist of 0.5% spray of Zinc Sulphate and 1% spray of Ferrous Sulphate at fourdifferent growth stages i.e. 40, 50, 60 and 70 days aĞer transplanting (DAT) and one con-trol. The results shown significant increasing trends of growth, yield aĴributes and yield ofrice with four sprays of 1.0% solution of FeSO4at 40, 50, 60 and 70 days and three sprays ofZnSO4at 50, 60 and 70 days recorded significantly higher plant height, effective tillers/m2,panicle length, grains/panicle, 1,000-grain weight, biological yield, grain yield and straw yieldat maturity. These treatments also gave significantly higher net returns and benefit: cost ratioover the control.

scholarly journals Assessment of lettuce quality during storage at low relative humidity using Global Stability Index methodology

2012 ◽  
Vol 32 (2) ◽  
pp. 366-373 ◽  
Author(s):  
María Roberta Ansorena ◽  
María Victoria Agüero ◽  
María Grabriela Goñi ◽  
Sara Roura ◽  
Alejandra Ponce ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Relative Humidity ◽  
Global Stability ◽  
Water Content ◽  
Relative Water Content ◽  
Storage Time ◽  
Stability Index ◽  
Total Chlorophyll ◽  
External Zone ◽  
Relative Water

During postharvest, lettuce is usually exposed to adverse conditions (e.g. low relative humidity) that reduce the vegetable quality. In order to evaluate its shelf life, a great number of quality attributes must be analyzed, which requires careful experimental design, and it is time consuming. In this study, the modified Global Stability Index method was applied to estimate the quality of butter lettuce at low relative humidity during storage discriminating three lettuce zones (internal, middle, and external). The results indicated that the most relevant attributes were: the external zone - relative water content, water content , ascorbic acid, and total mesophilic counts; middle zone - relative water content, water content, total chlorophyll, and ascorbic acid; internal zone - relative water content, bound water, water content, and total mesophilic counts. A mathematical model that takes into account the Global Stability Index and overall visual quality for each lettuce zone was proposed. Moreover, the Weibull distribution was applied to estimate the maximum vegetable storage time which was 5, 4, and 3 days for the internal, middle, and external zone, respectively. When analyzing the effect of storage time for each lettuce zone, all the indices evaluated in the external zone of lettuce presented significant differences (p < 0.05). For both, internal and middle zones, the attributes presented significant differences (p < 0.05), except for water content and total chlorophyll.

Anti-Oxidant Activities, Chemical Attributes and Fruit Yield of Peach Cultivars as Influenced by Foliar Application of Ascorbic Acid

2017 ◽  
Vol 69 (3) ◽  
pp. 113-121 ◽  
Author(s):  
Muhammad Sajid ◽  
Muhammad Ali Khan ◽  
Wasim Bilal ◽  
Abdur Rab ◽  
Zafar Iqbal ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Foliar Application ◽  
Fruit Yield ◽  
Anti Oxidant ◽  
Chemical Attributes

scholarly journals Soil Amendment Using Biochar and Application of K-Humate Enhance the Growth, Productivity, and Nutritional Value of Onion (Allium cepa L.) under Deficit Irrigation Conditions

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2598
Author(s):  
Khaled G. Abdelrasheed ◽  
Yasser Mazrou ◽  
Alaa El-Dein Omara ◽  
Hany S. Osman ◽  
Yasser Nehela ◽  
...  
Keyword(s):  
Drought Stress ◽  
Allium Cepa ◽  
Water Scarcity ◽  
Deficit Irrigation ◽  
Soil Amendment ◽  
Nutritional Value ◽  
Foliar Application ◽  
Field Trials ◽  
Global Challenge ◽  
Allium Cepa L

Water scarcity, due to physical shortage or inadequate access, is a major global challenge that severely affects agricultural productivity and sustainability. Deficit irrigation is a promising strategy to overcome water scarcity, particularly in arid and semiarid regions with limited freshwater resources. However, precise application of deficit irrigation requires a better understanding of the plant response to water/drought stress. In the current study, we investigated the potential impacts of biochar-based soil amendment and foliar potassium-humate application (separately or their combination) on the growth, productivity, and nutritional value of onion (Allium cepa L.) under deficient irrigation conditions in two separate field trials during the 2018/2019 and 2019/2020 seasons. Our findings showed that deficit irrigation negatively affected onion resilience to drought stress. However, these harmful effects were diminished after soil amendment using biochar, K-humate foliar application, or their combination. Briefly, integrated biochar and K-humate application increased onion growth, boosted the content of the photosynthetic pigments, enhanced the water relations, and increased the yield traits of deficient irrigation onion plants. Moreover, it improved the biochemical response, enhanced the activities of antioxidant enzymes, and enriched the nutrient value of deficiently irrigated onion plants. Collectively, these findings highlight the potential utilization of biochar and K-humate as sustainable eco-friendly strategies to improve onion resilience to deficit irrigation.

scholarly journals Acceleration Breaks the Cells Defense Mechanisms against Vibration in Anthemis gilanica Calli

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Halimeh Hassanpour ◽  
Vahid Niknam ◽  
Sadaf Salami
Keyword(s):  
Protein Content ◽  
Defense Mechanisms ◽  
Growth Parameters ◽  
Resonance Effect ◽  
Total Carbohydrate ◽  
High Acceleration ◽  
Acceleration Amplitude ◽  
Relative Water ◽  
Stress Damage

Vibration is a mechanical stress which happens in nature and affects many biological aspects of plants. In this research, the effect of acceleration and vibration was investigated on some physiological and biochemical responses of Anthemis gilanica in vitro. Calli were induced from leaf (LS) and root segments (RS) and were applied to different frequencies of vibrations (0, 50, and 100 Hz) and accelerations (1, 2, and 4 g) on the A. gilanica calli for 30 min. Results showed that vibration significantly increased relative water content (RWC), growth parameters, protein and proline contents, ascorbate peroxidase (APX), peroxidase (POX), and superoxide dismutase (SOD) activities and decreased total carbohydrate, malondialdehyde (MDA), H2O2 contents, and polyphenol oxidase (PPO) activity in both LS and RS calli. Inversely, increase of acceleration in vibrated calli decreased growth parameters, RWC, protein content, and POX activity and induced proline and carbohydrate accumulations, SOD, APX, and PPO activities as compared to vibration alone. Different responses of two callus types were observed, and the highest growth, protein content, and membrane stability were observed in LS calli as compared to RS calli. It found that high acceleration amplitude intensified the resonance effect of vibration by induction of lipid peroxidation and oxidative stress damage in A. gilanica.

scholarly journals STUDY OF IMPACT OF AIR POLLUTION ON PLANTS BY ESTIMATION OF APTI OF CERTAIN TREES IN KATRAJ AREA IN PUNE CITY

2020 ◽  
pp. 39-43
Author(s):  
Erum F H Kazi ◽  
Dr. Satish Kulkarni
Keyword(s):  
Air Pollution ◽  
Ascorbic Acid ◽  
Particulate Matter ◽  
Water Content ◽  
Relative Water Content ◽  
Air Pollutants ◽  
Total Chlorophyll ◽  
Mango Tree ◽  
Relative Water ◽  
Leaf Relative Water Content

Air pollution is one of major concerns in Pune City currently. Study highlights increase in Particulate matter from Vehicular sources & Urbanization in Karaj area is having harmful impact on the trees in the area. Leaf of Plant species such as Peepal( Ficusreligiosa),, Tamarind(Tamarindusindica), Rain tree( Samaneasaman), Ashoka( Saracaasoca), Manago( Mangiferaindica), Almond( Terminaliacatappa) , Banyan tree(Ficusbenghalensis) were selected and it was found that Ashoka( Saracaasoca), Mango tree( Mangiferaindica) showed Intermediate APTI whereas Peepal, Tamarind, Rain tree, Almond, Banyan tree were found to be Sensitive to pollution. KEYWORDS: Air Pollutants, APTI of plants, Total Chlorophyll, Ascorbic acid, p H of leaf, Relative water Content ( RWC)

scholarly journals Effects of the Foliar Application of Potassium Fertilizer on the Grain Protein and Dough Quality of Wheat

Agronomy ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1749
Author(s):  
Xiaoyan Gu ◽  
Yang Liu ◽  
Na Li ◽  
Yihong Liu ◽  
Deqiang Zhao ◽  
...  
Keyword(s):  
Protein Content ◽  
Foliar Application ◽  
Wheat Variety ◽  
Wheat Yield ◽  
Gluten Protein ◽  
Processing Quality ◽  
Potassium Fertilizer ◽  
Flowering Stage ◽  
Yield And Quality ◽  
Gluten Content

Potassium (K) has a significant effect on wheat yield and quality. Owing to the limitations of irrigation and production costs, soil-based applications of potassium fertilizer are not performed in wheat production on the Loess Plateau of China. In the late growth stage of wheat, potassium deficiency occurs even under sufficient nitrogen/phosphorus (N/P) levels, so it is necessary to supplement potassium through foliar spraying. However, there are few studies on the effect of the foliar application of potassium fertilizer (KFA) on wheat quality. Field experiments were conducted at two experimental sites for 2 years to study the effects of different potassium fertilizer application levels and periods on wheat yield and quality. The results showed that KFA had no significant effect on the yield of the wheat variety Xinong 20 (XN20) but increased the yield of the wheat variety Xiaoyan 22 (XY22). The improvement effect of KFA on the wet gluten content and stabilization time (ST) of XN20 was better than that on these parameters of XY22, while the sedimentation value (SV) and formation time (FT) showed the opposite trend. KFA significantly reduced the albumin content of the two varieties but had no significant effect on the globulin content. Compared with that at the other two stages, the potassium application in the form of potash fertilizer spray at a concentration of 60 mmol L−1 (K2) at the flowering stage (BBCH 65) significantly increased the protein content, wet gluten content, SV and gluten protein content in XN20 grains, whereas the application at 10 days after flowering (AA10, BBCH 71) at the K2 concentration was more beneficial to prolonging the dough FT. For XY22, the application of potassium fertilizer at the K2 concentration at the flowering stage increased the wet gluten and gluten protein levels and dough development time. There were significant genotypic differences in the composition and content of HMW-GS between the two varieties. KFA significantly increased the levels of the 1, 7 + 8, and 4 + 12 subunits in XN20 and the 1 subunit in XY22, but had no significant effect on the 2 + 12 subunit in XY22. Partial least squares path modelling (PLS-PM) analysis showed that the processing quality indexes (SV, FT, ST) and gluten protein and HMW-GS levels were regulated by the potassium fertilizer foliar spraying stage and concentration and revealed in part that KFA affected the processing quality by affecting the HMW-GS content.

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