scholarly journals Exogenously applied growth promoters modulate the antioxidant enzyme system to improve the cotton productivity under water stress conditions

2020 ◽  
Author(s):  
Nazim Hussain ◽  
Azra Yasmeen ◽  
Muhammad Ahsan Afzal
Keyword(s):  
Salicylic Acid ◽  
Water Stress ◽  
Leaf Extract ◽  
Defense Mechanism ◽  
Stress Conditions ◽  
Growth Stages ◽  
Growth Promoters ◽  
Exogenous Application ◽  
Cotton Plants ◽  
Moringa Leaf Extract

Great climatic inconsistency and increased frequent occurrences of severe conditions results in plants being exposed to water stress at various growth stages, thus adversely affecting the productivity. This investigation was planned to minimize the water stress induced-losses to cotton plants with the exogenous application of growth promoters i.e. distilled water, salicylic acid (0.5 mM), jasmonic acid (50 μM) and moringa leaf extract (MLE30) including control (un sprayed). Cotton plants were exposed to water stress with the application of irrigation water at 10 (well watered) and 30 day intervals (severe water stress). Results indicated that water stress severely reduced the cotton productivity. It was observed that exogenous application of salicylic acid and moringa leaf extract improved the productivity both under well watered and water stress conditions as compared to other treatments. However, exogenous application of salicylic acid had greater influence on the studied parameters than MLE, although the insignificant differences were documented in most of the traits. Exogenous application of salicylic acid reduced the cell injury percentage, improved the cell membrane thermostability and produced significantly higher content of leaf protein, superoxide dismutase (SOD), peroxidase (POD) and catalase (CAT) that modulated the negative influence of water stress on yield contributing attributes and produced maximum seed cotton yield. These results indicate that exogenous application of SA and MLE helped the cotton plants to become more tolerant to water stress-induced losses by adjusting the membrane characteristics and improving their antioxidant defense mechanism.

Morpho-physiological and yield responses to exogenous moringa leaf extract and salicylic acid in maize (Zea mays L.) under water stress

2017 ◽  
Vol 64 (7) ◽  
pp. 994-1010 ◽  
Author(s):  
Hanafey F. Maswada ◽  
Usama A. Abd El-Razek ◽  
Abdel-Nasser A. El-Sheshtawy ◽  
Abdelnaser A. Elzaawely
Keyword(s):  
Zea Mays ◽  
Salicylic Acid ◽  
Water Stress ◽  
Leaf Extract ◽  
Zea Mays L ◽  
Yield Responses ◽  
Moringa Leaf Extract

scholarly journals Effect of Microelements and Selenium on Superoxide Dismutase Enzyme, Malondialdehyde Activity and Grain Yield Maize (Zea mays L.) under Water Deficit Stress

2011 ◽  
Vol 39 (2) ◽  
pp. 153 ◽  
Author(s):  
Nourali SAJEDI ◽  
Hamid MADANI ◽  
Ahmad NADERI
Keyword(s):  
Superoxide Dismutase ◽  
Water Stress ◽  
Grain Yield ◽  
Water Deficit ◽  
Block Design ◽  
Stress Conditions ◽  
Water Deficit Stress ◽  
Growth Stages ◽  
Malondialdehyde Content ◽  
Main Plot

This study was carried out to investigate effects of microelements under water deficit stress at different growth stages on antioxidant enzyme alteration, chemical biomarker and grain yield of maize in the years 2007 and 2008. The experiment was conducted in a split plot factorial based on a randomized complete block design with four replications. There were three factors, water deficit stress at different stages of growth as main plot and combinations of selenium (with and without using) and microelements (with and without using) as sub plots. The result indicated that the activity of superoxide dismutase and malondialdehyde content under water deficit stress increased, but grain yield was reduced. The highest grain yield was obtained from optimum irrigation, while in the case of with water deficit stress at V8 stage it was non significant. Selenium spray increased activity of superoxide dismutase enzyme, malondialdehyde content of leaves in V8, R2 and R4 stages and also grain yield. Application of microelements increased the leaves superoxide dismutase enzyme activity and malondialdehyde content. Selenium and microelements spray under water deficit stress conditions during vegetative growth and dough stage increased grain yield in comparison to not spraying elements under water stress conditions. The present results also showed that by using selenium and microelements under water stress can obtain acceptable yield compared to not using these elements.

Salicylic acid application in the initial development of beans (Phaseolus vulgaris L.) under water stress conditions: Agronomical and antioxidant parameters

2021 ◽  
Vol 31 ◽  
pp. 101896
Author(s):  
Rodolfo Schmit ◽  
Jocleita Peruzzo Ferrareze ◽  
William Gustavo Sganzerla ◽  
Gabriel Bachega Rosa ◽  
Leandra Oliveira Xavier ◽  
...  
Keyword(s):  
Salicylic Acid ◽  
Water Stress ◽  
Phaseolus Vulgaris ◽  
Stress Conditions ◽  
Phaseolus Vulgaris L ◽  
Initial Development ◽  
Antioxidant Parameters

scholarly journals Investigation of improving the drought tolerance in persian petunia (Petunia sp.) by exogenous application of salicylic acid and gibberellic acid

2021 ◽  
Vol 20 (1) ◽  
pp. 37-48
Author(s):  
Morteza Goldani ◽  
Ali Dolatkhahi ◽  
Mahdi Parsa ◽  
Navid Vahdati ◽  
Zahra Rasouli
Keyword(s):  
Salicylic Acid ◽  
Water Stress ◽  
Stomatal Conductance ◽  
Gibberellic Acid ◽  
Water Deficit ◽  
Abiotic Stress Tolerance ◽  
Foliar Spray ◽  
Field Capacity ◽  
Exogenous Application ◽  
Four Levels

Plants respond to water deficit through several mechanisms. Among which, plant hormones play an important role in induction to abiotic stress tolerance. To bring this issue closer, an experiment was conducted to examine whether salicylic acid (SA) and gibberellic acid (GA3) exogenous applications through foliar spray could alleviate detrimental effects of water deficit on Persian petunia. Treatments consisted of water stress in three levels: 100% field capacity (F.C.) as control, 50, and 25% F.C linked with different concentrations of GA3 and SA sprayed at four levels (0, 100, 200 and 300 mg L–1). Results showed that the dry and fresh biomass, leaf area, photosynthetic pigments levels, relative water content (RWC) and the total number of flowers were significantly (P≤0.01) reduced in response to water deficit. However, free proline concentration and root-to-shoot ratio significantly increased in stressed plants. Plants subjected to severe water stress (25% F.C.), exhibit about 66% stomatal conductance rate lower than the plants grown at 100% F.C. The results showed that SA-treated plants exhibited reduced negative effect of water stress on most of the qualitative and quantitative attributes compared to control, while GA3 application had little impact on studied traits. Importantly, stomatal conductance and RWC were improved in water-stressed plants treated with SA. Moreover, SA-treated plants produced more flowers at all water deficit levels compared to GA3 sprayed plants. It can be concluded that Persian petunia plants respond to water deficit through adaptive changes at biochemical and morphological levels and that adverse effects of water deficit could be alleviated by exogenous application of SA.

scholarly journals Plant growth promoters mediated quality and yield attributes of milk thistle (Silybum marianum L.) ecotypes under salinity stress

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Noreen Zahra ◽  
Abdul Wahid ◽  
Muhammad Bilal Hafeez ◽  
Mohammed Nasser Alyemeni ◽  
Tariq Shah ◽  
...  
Keyword(s):  
Plant Growth ◽  
Salinity Stress ◽  
Leaf Extract ◽  
Climatic Conditions ◽  
Milk Thistle ◽  
Silybum Marianum ◽  
Growth Promoters ◽  
Yield Attributes ◽  
Plant Growth Promoters ◽  
Moringa Leaf Extract

AbstractSilybum marianum (L.) Gaertn (Astraceae) is a well-reputed medicinal plant mostly utilized for silymarin (Sily) content and oil production, however, the information about Sily contents in achene part is still fragmented under different climatic conditions. In this study four milk thistle ecotypes from Faisalabad (FSD), Gujranwala (GUJ), Quetta (QTA), and Kallar kahar (KK) having an altered achene color were analyzed under salt stress. Application of plant growth promoters (PGPs) is one of the solution for ameliorating the effect of salinity and increasing the quantity and quality traits of milk thistle, so ascorbic acid (AsA), thiourea (TU), and moringa leaf extract (MLE) were soil supplied after developing salinity stress (120 mM with irrigation) at germination stage. Predetermined levels were selected for PGPs such as AsA (500 µM), MLE (3%), and TU (250 µM). Results revealed that all yield related attributes were significantly decreased, while secondary metabolites, pericarp epidermis, pericarp parenchyma, and pericarp seed integument increased under salinity stress. Data suggested that PGPs treatment was helpful to alleviate the deleterious effects of salinity stress and enhance the milk thistle quality and quantity parameters. The ecotypic variations with altered achene color patterns represent an advantage for QTA ecotypes for higher Sily extraction under salt stressed conditions.

scholarly journals Moringa leaf extract improves biochemical attributes, yield and grain quality of rice (Oryza sativa L.) under drought stress

PLoS ONE ◽  
2021 ◽  
Vol 16 (7) ◽  
pp. e0254452
Author(s):  
Shahbaz Khan ◽  
Abdul Basit ◽  
Muhammad Bilal Hafeez ◽  
Sohail Irshad ◽  
Saqib Bashir ◽  
...  
Keyword(s):  
Oryza Sativa ◽  
Drought Stress ◽  
Gas Exchange ◽  
Photosynthetic Pigments ◽  
Leaf Extract ◽  
Grain Quality ◽  
Growth Stages ◽  
Severe Drought ◽  
Moringa Leaf Extract

Changing climate, food shortage, water scarcity and rapidly increasing population are some of the emerging challenges globally. Drought stress is the most devastating threat for agricultural productivity. Natural plant growth substances are intensively used to improve the productivity of crop plants grown under stressed and benign environments. The current study evaluated whether leaf extract of different moringa (Moringa oleifera L.) could play a role in improving drought-tolerance of rice (Oryza sativa L.). Rice plants were grown under three drought conditions, i.e., no, moderate and severe drought (100, 75 and 50% field capacity, respectively). Moringa leaf extract (MLE) obtained from four landraces (Multan, Faisalabad, D. G. Khan and exotic landrace from India) was applied during critical crop growth stages, i.e., tillering, panicle initiation and grain filling. Drought stress adversely affected the gas exchange attributes, photosynthetic pigments, antioxidant enzymes’ activities, yield and quality parameters of rice. Application of MLE from all landraces significantly improved physiological, biochemical and yield parameters under stressed and normal environmental conditions. The highest improvement in gas exchange traits (photosynthetic rate, stomatal conductance and respiration rate), photosynthetic pigments (chlorophyll a, b and carotenoids) and enzymatic activities (superoxide dismutase, catalase) and oxidative marker (H2O2) was recorded with MLE obtained from Faisalabad landrace. The application of MLE of Faisalabad landrace also improved yield and grain quality of rice grown under drought stress as well as drought-free environment. Thus, MLE of Faisalabad can be successfully used to improve growth, productivity and grain quality of rice under drought stress.

scholarly journals Effect of foliar application of moringa leaf extract on growth and yield of late sown wheat

2017 ◽  
Vol 3 (3) ◽  
pp. 323-329 ◽  
Author(s):  
Nusrat Zahan Jhilik ◽  
Tahsina Sharmin Hoque ◽  
Abu Zofar Md Moslehuddin ◽  
Md Anwarul Abedin
Keyword(s):  
Leaf Extract ◽  
Foliar Application ◽  
Block Design ◽  
Foliar Spray ◽  
Growth And Yield ◽  
Growth Stages ◽  
Yield Attributes ◽  
Science Field ◽  
Straw Yield ◽  
Moringa Leaf Extract

Moringa oleifera leaf extract has a potential effect as a growth enhancer of many crops. An experiment was conducted at the Soil Science Field Laboratory of Bangladesh Agricultural University, Mymensingh, Bangladesh to evaluate the effect of foliar application of moringa leaf extract on growth and yield of late sown wheat (BARI Gom-26). The experiment was laid out in a randomized complete block design with six treatments and three replications. The treatments were T1 (Control), T2 [moringa leaf extract (MLE) sprayed only at tillering stage], T3 (MLE sprayed at tillering and jointing stages), T4 (MLE sprayed at tillering, jointing and booting stages), T5 (MLE sprayed at tillering, jointing, booting and heading stages), and T6 (MLE sprayed only at heading stage). Application of moringa leaf extract significantly increased the growth and yield attributes as well as grain and straw yield of wheat. Among various treatments with moringa leaf extract the performance of T4 (MLE sprayed at tillering, jointing and booting stages) was the best as it produced the tallest plant (87.87 cm), the highest fresh and dry weight of root (16.51 g and 11.37 g respectively), the highest number of spikelets spike-1 (19.70) and filled grains spike-1 (45.53), as well as the highest grain and straw yield (3.62 t ha-1 and 5.43 t ha-1 respectively) of wheat. Therefore, moringa leaf extract as a foliar spray can be applied at critical growth stages to increase the growth and yield potentiality of late sown wheat.Asian J. Med. Biol. Res. September 2017, 3(3): 323-329

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