Role of Proline in Mitigating the Deleterious Effects of Heat Stress in Chillies

Summary Chilli is a spicy crop which belongs to family Solanaceae. As a vegetable crop, it is considered as one of the major cultivated crops in the world seriously affected by the climatic changes, including elevation in temperature. Therefore, in this research various morpho-physiological characteristics of chilli were studied for heat tolerance under the influence of exogenous application of proline. This research was carried out in a growth room of the Institute of Horticultural Sciences, University of Agriculture, Faisalabad, Pakistan. Four chilli genotypes were evaluated under the applied conditions. Seeds were grown in plastic pots. Heat stress (40/32 ºC day and night temperature) was applied 30 days after the emergence. Foliar spray of proline (0, 5 and 10 mM) was applied during heat stress, and after 7 days of stress the plants were harvested. The results revealed that the inhibition of chilli growth by heat stress was successfully mediated by proline application. Morphological attributes such as the number of leaves per plant, root and shoot length, plant fresh and dry weight were reduced in response to heat stress, and physiological attributes such as photosynthetic rate, water use efficiency and chlorophyll contents were also reduced in response to heat stress, except transpiration rate and stomatal conductance, which increased under heat stress and showed recovery by proline application. Exogenous application of proline promoted tolerance against heat stress in chilli genotypes and enhanced growth. All the observed traits exhibited recovery in response to proline stimulus, indicating the role of proline in mitigating the consequences of heat stress. Recovery also depends on genetic capability of various cultivars.

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Improvement of antioxidant activities and yield of spring maize through seed priming and foliar application of plant growth regulators under heat stress conditions

Semina Ciências Agrárias ◽

10.5433/1679-0359.2017v38n1p47 ◽

2017 ◽

Vol 38 (1) ◽

pp. 47 ◽

Cited By ~ 2

Author(s):

Ijaz Ahmad ◽

Shehzad Maqsood Ahmed Basra ◽

Muhammad Akram ◽

Allah Wasaya ◽

Muhammad Ansar ◽

...

Keyword(s):

Heat Stress ◽

Grain Yield ◽

Foliar Application ◽

Antioxidant Activities ◽

Foliar Spray ◽

Seed Priming ◽

Chlorophyll Contents ◽

Exogenous Application ◽

Hybrid Maize

Heat stress during reproductive and grain filling phases adversely affects the growth of cereals through reduction in grain’s number and size. However, exogenous application of antioxidants, plant growth regulators and osmoprotectants may be helpful to minimize these heat induced yield losses in cereals. This two year study was conducted to evaluate the role of exogenous application of ascorbic acid (AsA), salicylic acid (SA) and hydrogen peroxide (H2O2) applied through seed priming or foliar spray on biochemical, physiological, morphological and yield related traits, grain yield and quality of late spring sown hybrid maize. The experiment was conducted in the spring season of 2007 and 2008. We observed that application of AsA, SA and H2O2 applied through seed priming or foliar spray improved the physiological, biochemical, morphological and yield related traits, grain yield and grain quality of late spring sown maize in both years. In both years, we observed higher superoxide dismutase (SOD), catalase (CAT) and peroxidase (POD) activity in the plants where AsA, SA and H2O2were applied through seed priming or foliar spray than control. Membrane stability index (MSI), relative water contents (RWC), chlorophyll contents, grain yield and grain oil contents were also improved by exogenous application of AsA, SA and H2O2 in both years. Seed priming of AsA, SA and H2O2was equally effective as the foliar application. In conclusion, seed priming with AsA, SA and H2O2 may be opted to lessen the heat induced yield losses in late sown spring hybrid maize. Heat tolerance induced by ASA, SA and H2O2 may be attributed to increase in antioxidant activities and MSI which maintained RWC and chlorophyll contents in maize resulting in better grain yield in heat stress conditions.

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Effect of Foliar Application of Growth Regulators on Vegetative and Physiological Growth Parameters in Ajowan (Trachyspermum ammi L. Sprague)

Current Journal of Applied Science and Technology ◽

10.9734/cjast/2020/v39i2930962 ◽

2020 ◽

pp. 100-109

Author(s):

Y. Rajasekhara Reddy ◽

G. Ramanandam ◽

P. Subbaramamma ◽

A. V. D. Dorajeerao

Keyword(s):

Leaf Area ◽

Foliar Application ◽

Growth Parameters ◽

Block Design ◽

Foliar Spray ◽

Dry Weight ◽

Area Index ◽

Chlorophyll Contents ◽

Trachyspermum Ammi ◽

Number Of Leaves

A field experiment was carried out during rabi season of 2018-2019, at college farm, College of Horticulture, Dr. Y.S.R. Horticultural University, Venkataramannagudem, West Godavari District, Andhra Pradesh. The experiment was laidout in a Randomised Block Design with eleven treatments (viz., T1- NAA @ 50 ppm, T2-NAA @ 100 ppm, T3-GA3 @ 50 ppm, T4-GA3 @ 100 ppm, T5-Thiourea @ 250 ppm, T6-Thiourea @ 500 ppm, T7-28-Homobrassinolide @ 0.1 ppm, T8-28-Homobrassinolide @ 0.2 ppm, T9-Triacontinol @ 2.5 ppm, T10-Triacontinol @ 5 ppm, T11-(Control) Water spray) and three replications. The treatments were imposed at 30 and 45 DAT in the form of foliar spray. Foliar application of GA3@ 100 ppm (T4) had recorded the maximum plant height (108.20 cm), leaf area (9.53 cm2) and leaf area index (0.74). Foliar application of thiourea @ 250 ppm (T5) had recorded the maximum values with respect to number of primary branches (15.03 plant-1), number of secondary branches (83.40 plant-1), plant spread (1793 cm2 plant-1), fresh weight (376.29 g plant-1), dry weight (103.54 g plant-1) and number of leaves plant-1((298.8). The same treatment (T5) had recorded the highest values with respect to crop growth rate (1.44 gm-2d-1), chlorophyll-a (1.40 mg g-1), chlorophyll-b (0.076 mg g-1) and total chlorophyll contents (1.48 mg g-1) in the leaves.

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Role of mineral nutrition in alleviation of heat stress in cotton plants grown in glasshouse and field conditions

Scientific Reports ◽

10.1038/s41598-019-49404-6 ◽

2019 ◽

Vol 9 (1) ◽

Author(s):

Muhammad Sarwar ◽

Muhammad Farrukh Saleem ◽

Najeeb Ullah ◽

Shafaqat Ali ◽

Muhammad Rizwan ◽

...

Keyword(s):

Heat Stress ◽

High Temperature ◽

Stomatal Conductance ◽

Foliar Spray ◽

Cotton Yield ◽

Seed Cotton ◽

Chlorophyll Contents ◽

Seed Cotton Yield ◽

Boll Weight ◽

Cotton Plants

Abstract Coincidence of high temperature with terminal reproductive pheno-stages of cotton is chief constraint to achieve yield potential. This high temperature interfere plant defensive system, physiological process, water relations and lint yield production. In this study, we modulated the detrimental outcomes of heat stress on cotton through the foliar spray of nutrients. Cotton crop was exposed to sub-optimal and supra-optimal thermal regimes for a period of one week at squaring, flowering and boll formation stages under glass house and field conditions. Foliar spray of potassium (K-1.5%), zinc (Zn-0.2%) and boron (B-0.1%) were applied at three reproductive stages one day prior to expose high temperature regimes. High temperature increased lipid membrane damage through increased malondialdehyde (MDA) contents in cotton leaves. High temperature stress also reduced leaf chlorophyll contents, net photosynthetic rate, stomatal conductance, water potential, averaged boll weight (g) and seed cotton yield per plant. Various nutrients variably influenced growth and physiology of heat-stressed cotton plants. Zinc outclassed all other nutrients in increasing leaf SOD, CAT, POX, AsA, TPC activity, chlorophyll contents, net photosynthetic rate, stomatal conductance, water potential, boll weight and seed cotton yield per plant. For example, zinc improved seed cotton yield under supra-optimal thermal regime by 17% and under sub-optimal thermal regime by 12% of glasshouse study while 19% under high temperature sowing dates of field study than the water treated plants under the same temperatures. Conclusively, increasing intensities of temperature adversely affected the recorded responses of cotton and exogenous application of Zn efficaciously alleviated heat induced perturbations. Moreover, exogenous nutrients mediated upregulations in physiochemical attributes induced heat tolerance at morphological level.

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Effect of ascorbic and salicylic acids on growth and flowering of Gazania cv. Frosty Kiss Mixed

Ornamental Horticulture ◽

10.1590/2447-536x.v26i4.2118 ◽

2020 ◽

Vol 26 (4) ◽

pp. 537-544

Author(s):

Abdul Kareem A.J. Mohammad Saeed

Keyword(s):

Ascorbic Acid ◽

Leaf Area ◽

Growth Traits ◽

Foliar Spray ◽

Dry Weight ◽

Fresh Weight ◽

Flowering Duration ◽

Flowering Date ◽

Flower Diameter ◽

Number Of Leaves

Abstract An experiment was conducted during the season 2018-2019 in the lath house to study the effect of foliar spray with Ascorbic Acid (AsA) and Salicylic Acid (SA) on vegetative and flowering growth traits of Gazania (Gazania rigens L.) cv. Frosty Kiss Mixed. The experiment was designed as a factorial experiment (3×3) in Randomized Complete Blocks Design (RCBD) with three replicates. Plants were sprayed with concentrations of 0, 100, and 200 mg L-1 of AsA, and 0, 150 and 300 mg L-1 of SA. Foliar spray with 200 mg L-1 of AsA was superior on increasing number of leaves (40.00), number of suckers (9.22), leaf area (2174.09 cm2), leaves dry weight (6.36 g), number of flowers (5.64), early of flowering date (97.22 days), flower fresh and dry weight (4.78 g) (0.51 g) respectively, while spray with a concentration of 100 mg L-1 led to increase flower diameter (6.37 cm) and flowering duration (10.85 days). Foliar spray with SA improved all vegetative and flowering traits. Treatment of 300 mg L-1 was the most significant effect in increasing number of leaves (39.56), leaf area (2182.06 cm2), leaves fresh weight (43.93 g), number of flowers (5.83), flower diameter (6.31 cm), early of flowering date (98.07 days), and flower dry weight (0.50 g). The interaction effect between the studied factors was significant in all studied traits. Treatment of AsA200×SA150 was the most effective and gave the best results in terms of number of suckers (9.11), dry weight of leaves (6.49 g), number of flowers (5.87), flower diameter (6.44 cm), flowering date (96.98 days), flowering duration (10.89 days).

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Impact of Exogenous Application of Salicylic Acid and Hydrogen Peroxide on Essential Nutrients and Silymarin in Silybum Marianum (L.) Gaertn Grown at Two Different Altitudes of Balochistan Under Cadmium Stress

10.21203/rs.3.rs-917972/v1 ◽

2021 ◽

Author(s):

Mereen Nizar ◽

Kanval Shaukat ◽

Noreen Zahra ◽

Abdul Samad ◽

Mohammad Bilal Hafeez ◽

...

Keyword(s):

Hydrogen Peroxide ◽

Salicylic Acid ◽

Cadmium Toxicity ◽

Foliar Spray ◽

Cadmium Stress ◽

Milk Thistle ◽

Silybum Marianum ◽

Essential Nutrients ◽

Exogenous Application

Abstract Cadmium (Cd+2) is a potentially toxic element that inhibits growth and development of several species of plants along with Silybum marianum (L.) Gaertn which is an essential medicinal plant belonging to family Asteraceae. The exogenous application with 0.25µM Salicylic acid (SA) and 10µM hydrogen peroxide (H2O2) to ameliorate harmful effects of cadmium (500 µM) on milk thistle were studied that were grown at two different ecological zones of Balochistan province of Pakistan i.e. Quetta (Qta) and Turbat (Tbt). The design of experiment was Randomized Complete Block Design (RCBD) with three replicates. Application of SA and H2O2, priming (P), Foliar spray (FS) and combinational treatments (P+FS) were highly helpful in alleviating the negative role of cadmium toxicity. The essential nutrients i.e. nitrate (NO3-), calcium (Ca2+) and potassium (K) were affected by Cd+2 induced toxicity however, the substantial role of SA and H2O2 widely helped to reduce the cadmium stress and boosted up the plant nutrients content. In a nutshell, exogenous treatments of SA and H2O2 enhanced the yield potential along with highest silymarin contents in milk thistle seeds which is of prime significance for its medicinal importance in treatment of liver diseases. The data obtained in this study highly recommend the priming and foliar spray of SA and H2O2 on milk thistle plants, as the best solution to alleviative the cadmium toxicity which will ultimately leads to better growth and yield of the plants.

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Role of Foliar Application of Salicylic Acid and Cultivars in Chilli (Capsicum frutescens L.) Production in Arid Region of Bahawalpur

Journal of Horticultural Science & Technology ◽

10.46653/jhst190201005 ◽

2019 ◽

pp. 5-9

Author(s):

Muhammad Nafees ◽

Rashid Hussain ◽

Ishtiaq Ahmad ◽

Muhammad Ahsan ◽

Muhammad Naveed Aslam ◽

...

Keyword(s):

Salicylic Acid ◽

Arid Region ◽

Foliar Application ◽

Foliar Spray ◽

Growth And Yield ◽

Leaf Chlorophyll ◽

Yield Parameters ◽

Number Of Leaves ◽

Foliar Concentration

A field experiment was carried out to screen the best foliar concentration of salicylic acid (SA) out of 25, 50, 75 and 100 mg L-1 for its effect on various growth and yield parameters like number of leaves, plant height, number of fruits plant-1, fruit dimensions, leaf chlorophyll content and yield plant-1 in three chilli cultivars. The selected chilli cultivars included were Sky-Land-II, Sky-Land and 1130. The experiment was conducted in field area of the Department of Horticultural Sciences, The Islamia University of Bahawalpur, Pakistan during 2017. Results indicated that different levels of SA significantly increased plant growth and yield parameters, but the level of SA @ 75 mg L-1 highly improved the studied parameters in selected cultivars. Moreover, foliar spray of SA significantly increased growth in selected cultivars; however, Sky-Land-II performed better in response to different concentrations of SA. In conclusion, foliar spraying of 75 mg L-1 SA could be recommended to chilli growers under arid region of Bahawalpur for growing cultivar Sky-Land-II.

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PENGGUNAAN MEDIA ALTERNATIVE (DIAPERS) TERHADAP PERTUMBUHAN DAN PRODUKSI TANAMAN CABAI

Jurnal Agrium ◽

10.29103/agrium.v15i1.687 ◽

2018 ◽

Vol 15 (1) ◽

pp. 34

Author(s):

Safrizal Safrizal ◽

Nazimah Nazimah ◽

Rina Resssi

Keyword(s):

Dry Weight ◽

Leaf Length ◽

Household Waste ◽

Home Garden ◽

Root Weight ◽

Plant Canopy ◽

Number Of Leaves ◽

Different Response

Red chili is a major vegetable both in Indonesia and abroad due to its benefits to the needs of nutrition and health through cooking spices. Utilization of home garden yard is an effective way to cultivate pepper plants. On the other hand, every household produces household waste which is difficult to decompose for instance diapers, so that it can cause environmental pollution in long-term. This study was conducted to investigate the role of planting media such as diapers of on chili growth. The results showed that the use of diapers of diapers as planting media gave no significant different to plant height at 1, 4, 7, 10, 13 and 16 week after application. It also did not increase the number of leaves at the age of 1, 7, 10, 13 and 16 week after application. There were no changes in leaf length at ages 1, 4, 7, 10 and 16 week after application. It also happened to also its leaf width at ages 1, 4, 7, 10, 13 and 16 week after application and number of branches at ages 1, 4, 7, 13 and 16 week after aplication. However, it showed a significant different to the number of leaves at age 4 week after planting and its leaf length at age 13 week after planting. The interaction of using diapers as planting media gave significantly different response to root number, root length, wet root weight and plant canopy, and dry weight roots and plant canopy.

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KARAKTER AGRONOMI BERBAGAI AKSESI TANAMAN KATUK (Sauropus androgynus (L.) Merr.) PADA PEMBERIAN BERBAGAI DOSIS URINE SAPI

JURNAL AGRONIDA ◽

10.30997/jag.v5i2.2315 ◽

2019 ◽

Vol 5 (2) ◽

Author(s):

Ekal Kurniawan ◽

Arifah Rahayu ◽

Yanyan Mulyaningsih

Keyword(s):

Vitamin C ◽

Plant Height ◽

Dry Weight ◽

Agronomic Performance ◽

Fresh Weight ◽

Chlorophyll Contents ◽

Randomized Design ◽

Number Of Leaves ◽

Completely Randomized Design ◽

Four Levels

Katuk (Sauropus androgynus (L.) Merr.) is an indigenous leafy vegetable whose growth is affectedby nitrogen element. This study was aimed at assessing the agronomic performance of four katukaccessions grown with various rates of cattle urine. A factorial completely randomized design wasused. The first factor was katuk accession consisting of four levels, namely Pandeglang, Cianjur,Sukabumi, Leuwiliang, and Kemang. The second factor was cattle urine rates consisting of 5 levels,namely 0%R cattle urine (0.0 ml/plant), 50%R cattle urine (468.75 ml/plant), 100%R cattle urine(937.50 ml/plant), 150% R cattle urine (1406.25 ml/plant), and 100%R urea (8.2 g/plant). Thegrowth and productivity of katuk of Cianjur accession had the highest number of buds, total lengthof buds, number of leaves, number of leaflets, fresh weight, and dry weight. The utilization of 50%R,100%R, and 150%R of cattle urine was found to have higher fresh and dry weight than did theutilization of 0%R cattle urine and 100%R urea. The best quality katuk was Cianjur accessionwhich was found to have the highest vitamin C and chlorophyll contents. No significant effects ofall treatments were found in all vegetative variables except plant height and root fresh and dryweight. It was concluded that cattle urine could be used as a urea substitute.Key words: Sauropus androgynus, number of buds, dry weight, indegenous plant

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THE ROLE OF SUSTAINABLE AGRICULTURE ON THE GROWTH AND YIELD OF EGGPLANT

IRAQI JOURNAL OF AGRICULTURAL SCIENCES ◽

10.36103/ijas.v47i3.563 ◽

2016 ◽

Vol 47 (3) ◽

Author(s):

Abu-Alaees & AL-Baity

Keyword(s):

Sustainable Agriculture ◽

Plant Height ◽

Dry Weight ◽

Growth And Yield ◽

Main Root ◽

Plant Yield ◽

Significant Difference ◽

Two Factors ◽

Number Of Leaves

A field experiment was carried out in the vegetable field of Horticulture Department and Landscape Gardening, College of Agriculture, Abu-Ghraib In the spring season 2014 to study the Role of Sustainable agriculture in the growth and yield of Eggplant, were studied of Two factors the first factor represent two treatment, first is shading with plastic nets (50% light) and the second without shading, each of these treatment contained three replicates and distributed randomly these eight treatments (without adding, Endospor Dry Mix, Biohealth, Amino Alexin, interacion between Endospor Dry Mix and Biohealth interaction between Endospor Dry Mix and Amino Alexin interaction between Biohealth and Amino Alexin triple interaction between Endospor Dry Mix and Biohealth and Amino Alexin and symbolized by (Control, A, B, O, AB, AO, BO and ABO). The experiment carried out within (Nested Design), and analyzed according to test least significant difference ( LSD) and at the probability level of 5%, Results showed the treatment A gavr a significant increase at height of the plant (98.5 cm), and the number of leaves (135.0 leaf.plant-1), and the dry weight of vegetative (125.8 g), and the length of the main root (51.17 cm), and the dry weight of roots (17.82 g), and the length of the fruit (11.64 cm), and the diameter of the fruit (6.40 cm), and the number of fruits (13.45 fruit), and the plant yield (2.30kg.plant-1). It excelled treatment using biostimulative ABO significantly in (leaf content of N 3.045%), and ( leaf contant P 0.684%), and (leaf content K 2.878%). The treatment of shading significantly in the plant height (97.6 cm), and the number of leaves (117.4 leaf.plant-1), and the dry weight of vegetative (108.5 g), and the length of the main root (47.54 cm) and the dry weight of the roots (12.91 g) and the length of the fruit (11.14 cm) and the fruit diameter (6.71 cm) and the weight of the fruit (169.6 g) and the number of fruits (11.21 fruit.plant-1) and the plant yield (1.91 kg.plant-1). The interaction between treatment A and shading significantly in the number of leaves (150.0 leaf.plant-1), and the dry weight of vegetative (136.7 g) and the length of the main root (53.0 cm), and the dry weight of roots (21.38 g) and the length of the fruit (12.80 cm) and the number of fruits (14.37 fruit. plant -1) and the plant yield (2.47 kg.plant-1). The interaction between the treatment AO and the shading significantly in the plant height (122.7 cm), and the length of the main root (53.00 cm) and the diameter of the fruit (7.10 cm).

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Influence of foliar-applied glycinebetaine on growth, yield and some key physiological and biochemical attributes of grape (Vitis vinifera L.)

Semina Ciências Agrárias ◽

10.5433/1679-0359.2021v42n6p3201 ◽

2021 ◽

Vol 42 (6) ◽

pp. 3201-3218

Author(s):

Hasnain Waheed ◽

Hafiz Muhammad Tayyab Khan ◽

Muhammad Mansoor Javaid ◽

Rashad Mukhtar Balal ◽

Muhammad Adnan Shahid ◽

...

Keyword(s):

Vitis Vinifera ◽

Foliar Application ◽

Foliar Spray ◽

Growth Yield ◽

Grape Juice ◽

Soluble Solids ◽

Control Treatment ◽

Vitis Vinifera L ◽

Chlorophyll Contents ◽

Number Of Leaves

Glycinebetaine (GB) plays an imperative role to mitigate the opposing impact of several environmental stresses in various crops. The objective of this investigation was to scrutinize the response of grape (Vitis vinifera L.) to the foliar application of GB. Diverse levels of GB (0, 10, 20 and 30 mM) were applied three times with fifteen days interval to grape cv. King’s Ruby. All levels of GB improved the physiological, biochemical and growth attributes of the grape. As compared to control treatment, foliar spray of GB applied at 30 mM increased the number of leaves/vine, leaf area and number of newly emerged branches/plant by 20.55%, 12.28% and 48.13%, respectively. The pH of grape juice was decreased by increasing GB levels. However, total soluble solids, total chlorophyll contents, grape yield and photosynthesis rate was recorded maximum with foliar spray of GB applied at 30 mM. The regression model predicted that each increment in GB level enhanced the number of leaves/plant and the number of newly emerged branches/plant by 1.8 and 0.7, respectively. Thus, it is concluded that exogenous application GB applied at 30 mM might be more useful to obtain the optimum growth and quality of grapes.

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