scholarly journals Effects of glycine betaine on plant growth and performance of Medicago sativa and Vigna unguiculata under water deficit conditions

1970 ◽  
pp. 1-8
Author(s):  
Hanan Kamal Khadouri ◽  
Karthishwaran Kandhan ◽  
Mohammed Abdul Salem
Keyword(s):  
Drought Stress ◽  
Medicago Sativa ◽  
Water Deficit ◽  
Vigna Unguiculata ◽  
Glycine Betaine ◽  
Growth Parameters ◽  
Block Design ◽  
Foliar Spray ◽  
Mineral Nutrients ◽  
Randomized Block Design

Managing water consumption of the crops is one of the strategies which have been adopted locally and worldwide in current trends of sustainable agriculture. In addition to the low level of water resources in UAE because of the rare precipitation, no fresh, free-flowing water, rivers, lakes or streams. The present study was aimed to evaluate the effects of exogenous Glycine Betaine (GB) on Alfalfa (Medicago sativa) and Cowpea (Vigna unguiculata) within different levels of drought stress. A pot experiment was designed on a completely randomized block design (CRBD) with three replicates. Exogenous GB was applied as a foliar spray in three levels (0,100 and 200 ppm) five times with five days intervals. Drought stress starts within the second GB treatment in three levels (24h: 100% well-watered), (48h: 60% water deficit) and (72h: 40% water deficit) depending on the required quantity. Growth characteristics, pigment concentrations, biochemical content and Mineral nutrients levels were measured in response to the treatment variables. Results showed that the GB has a significant increment in Growth parameters, biochemical contents, and Mineral nutrients concentrations. The results of the present investigation suggested that the exogenous application of GB was improved the drought tolerance in Cowpea and has enhanced the Alfalfa performance under drought stress in both concentrations 100 and 200 ppm under drought stress of 60% of irrigations water.  In due of comparison of Cowpea and Alfalfa, it’s found from this study that GB has a better effect on the Cowpea under drought stress than Alfalfa.

scholarly journals ESTRATÉGIAS DE IRRIGAÇÃO COM DÉFICIT HÍDRICO NOS ESTÁDIOS FENOLÓGICOS DO FEIJÃO-CAUPI SOB ADUBAÇÃO POTÁSSICA

Irriga ◽  
2021 ◽  
Vol 26 (1) ◽  
pp. 111-122
Author(s):  
Lauriane Almeida dos Anjos Soares ◽  
Thamara Layse Freitas Medeiros ◽  
Victoria Cristina Gomes Colman ◽  
Irlan Victor de Sousa Palmeira ◽  
Idelvan José da Silva ◽  
...  
Keyword(s):  
Water Deficit ◽  
Vigna Unguiculata ◽  
Arid Regions ◽  
Block Design ◽  
Management Strategies ◽  
Phenological Stages ◽  
Randomized Block Design ◽  
Management Of Resources ◽  
Pod Length ◽  
E Mail

ESTRATÉGIAS DE IRRIGAÇÃO COM DÉFICIT HÍDRICO NOS ESTÁDIOS FENOLÓGICOS DO FEIJÃO-CAUPI SOB ADUBAÇÃO POTÁSSICA     LAURIANE ALMEIDA DOS ANJOS SOARES1; THAMARA LAYSE FREITAS MEDEIROS2; VICTORIA CRISTINA GOMES COLMAN3; IRLAN VICTOR DE SOUSA PALMEIRA4; IDELVAN JOSÉ DA SILVA5 E ROMULO CARANTINO LUCENA MOREIRA6   1 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 2 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 3 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 4 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Rua Jario Vieira Feitosa, 1770, Bairro dos Pereiros, Pombal, PB, Brasil. E-mail: [email protected] 5 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected] 6 Unidade Acadêmica de Engenharia Agrícola, Universidade Federal de Campina Grande, UFCG, Rua Aprígio Veloso, 882 -Universitário, Campina Grande, PB, Brasil. E-mail: [email protected]     1 RESUMO   Palavras-chave: Vigna unguiculata L., tolerância à seca, nutrição mineral     SOARES, L. A. dos A.; MEDEIROS, T. L. F.; COLMAN, V. C. G.; PALMEIRA, I. V. de S.; SILVA, I. J. da; MOREIRA, R. C. L. IRRIGATION STRATEGIES WITH WATER DEFICIT IN THE PHENOLOGICAL STAGES OF THE COWPEA UNDER POTASSIC FERTILIZATION     2 ABSTRACT   In semi-arid regions, water deficiency is the main environmental factor that influences the yield of plants, in these regions the proper management of resources is essential in order to guarantee the sustainability of the production system. Thus, this study aimed to evaluate the morphology and phytomass partition of cowpea (Vigna unguiculata L.), to cultivate BRS Marataoã, when submitted to water deficit management strategies in different phenological stages of the crop and fertilization doses potassium. A randomized block design was used, in a 5 x 5 factorial scheme, with three replications, with the treatments being defined according to the five potassium fertilization doses (50, 75, 100, 125, and 150% of K2O) associated with five water deficit management strategies at the different phenological stages of the crop. The application of water deficit associated with potassium doses favored the growth and accumulation of phytomass in the flowering phase. Increasing doses of potassium when associated with water deficit in the flowering and fruiting stages compromise the number of pods and pod length. In the early stages of the development of cowpea, irrigation with water deficit can be applied without significant losses in the production components.   Keywords: Vigna unguiculata L., drought tolerance, mineral nutrition

scholarly journals Effect of Vermicompost and Foliar Spray of Zinc on Growth, Quality and Productivity of Groundnut (Arachis hypogaea L.)

2021 ◽  
pp. 81-87
Author(s):  
Sunil Kumar Dadhich ◽  
Govind Kumar Yadav ◽  
Chiranjeev Kumawat ◽  
Ajeet Singh
Keyword(s):  
Arachis Hypogaea ◽  
Growth Parameters ◽  
Root Nodules ◽  
Block Design ◽  
Foliar Spray ◽  
Quality Parameters ◽  
Randomized Block Design ◽  
Arachis Hypogaea L ◽  
Soil Zn ◽  
Growth Quality

A field experiment was conducted during 2018-19 and 2019-20 to study the effect of vermicompost and foliar spray of zinc on growth, quality and productivity of groundnut (Arachis hypogaea L.) The experiment comprising of ten treatments viz., T1 (NPK), T2 (NPK +VC), T3 (NPK +VC+ Soil Zn 100%), T4 (NPK + VC+ Soil Zn 75%), T5 (NPK + foliar spray of 0.25% ZnSO4), T6 (NPK + foliar spray of 0.50% ZnSO4), T7 (NPK + foliar spray of 0.75% ZnSO4), T8 (NPK + VC + foliar spray of 0.25% ZnSO4), T9 (NPK + VC + foliar spray of 0.50% ZnSO4) and T10 (NPK + VC + foliar spray of 0.75% ZnSO4) were replicated thrice and evaluated in the randomized block design (RBD). The experimental soil was loamy sand in texture, low in N, high in available P and medium in K. Groundnut variety, RG 559-3 was tested. The results of the experiment revealed that significantly higher values of growth parameters viz., plant height and number of root nodules plant-1; yield viz., pod yield (44.3, 47.2 q ha-1) and haulm yield (54.03, 58.8 q ha-1); quality parameters viz., oil content and protein content were recorded under the treatment receiving NPK (15:60:30) +VC (5 t ha-1) + Soil Zn 100% (T3) over control (T1) while at par with the application of NPK + VC+ Soil Zn 75% (T4), NPK + VC + foliar spray of 0.25% ZnSO4 (T8), NPK + VC + foliar spray of 0.50% ZnSO4 (T9) and NPK + VC + foliar spray of 0.75% ZnSO4 (T10).

scholarly journals Respons dua mutan tomat terhadap cekaman kekeringan

Kultivasi ◽  
2020 ◽  
Vol 19 (2) ◽  
Author(s):  
Ayu Ratna Ningrum ◽  
Anne Nuraini ◽  
Erni Suminar ◽  
Syariful Mubarok
Keyword(s):  
Drought Stress ◽  
Vegetative Growth ◽  
Stress Condition ◽  
Growth Parameters ◽  
Block Design ◽  
Wild Type ◽  
Seed Technology ◽  
Randomized Block Design ◽  
Drought Stress Condition

AbstrakKondisi cekaman kekeringan pada tanaman tomat dapat menyebabkan pertumbuhan dan produksi tanaman tomat menurun. Salah satu upaya yang dapat dilakukan untuk mengatasi masalah tersebut adalah dengan perakitan varietas tanaman baru yang tahan terhadap cekaman kekeringan. Beberapa hasil mutasi gen IAA pada tomat mutan Micro-Tom mampu menghasilkan tanaman yang toleran terhadap kondisi stress secara abiotik, yaitu pada galur iaa9-3 dan iaa9-5. Penelitian ini dilakukan untuk mengetahui respons pertumbuhan vegetatif pada iaa9-3 dan iaa9-5 dalam kondisi cekaman kekeringan dengan metode in vitro. Penelitian dilaksanakan di Laboratorium Kultur Jaringan dan Teknologi Benih Fakultas Pertanian Universitas Padjadjaran pada bulan September sampai Desember 2019. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok Faktorial yang terdiri dari dua faktor dan diulang tiga kali. Faktor pertama adalah  mutan, yaitu iaa9-3, iaa9-5 dan Wild-Type Micro-Tom (WT-MT) sebagai kontrol, dan faktor kedua adalah tingkat cekaman kekeringan menggunakan konsentrasi polietilen glikol (PEG) yaitu 0%, 5%, 10%, 15%, 20%. Hasil penelitian menunjukkan bahwa terdapat interaksi antara galur dan tingkat cekaman kekeringan pada parameter tinggi tanaman, jumlah akar, dan panjang akar, sedangkan pada jumlah daun eksplan dipengaruhi oleh galur dan tingkat cekaman secara mandiri. Pada kondisi tercekam, semua galur tomat yang diamati mengalami penurunan pada seluruh parameter pertumbuhan terutama pada galur WT-MT.  Galur iaa9-3 dan iaa9-5 toleran terhadap cekaman kekeringan sampai dengan konsentrasi 5% PEG, sedangkan untuk WT-MT sudah mengalami penurunan yang signifikan pada cekaman kekeringan 5% PEG.Kata Kunci: cekaman kekeringan, auksin, tomat, mutan, polietilen glikolAbstractDrought stress conditionin tomato plants cause the reduction of plant growth and production. One of the effort to resolve  this problem is by assembling new varieties that are tolerant to drought stress. Several IAA gene mutation have been generated to produced tolerant plant under abiotic stress condition, namely iaa9-3 and iaa9-5. This research was conducted to determinerespons of vegetative growth of iaa9-3 and iaa9-5 under drought stress condition by in vitro method. The experiment was conducted at Tissue Culture and Seed Technology Laboratory, Faculty of Agriculture, Universitas Padjajaran from September to December 2019. The experimental design used factorial Randomized Block Design, consisted of two factors and repeated three times. The first factor was tomatoes mutant, namely iaa9-3, iaa-95, and Wild Type Micro-Tom (WT-MT) as a control and the second factor was the level of drought stress of polyethylene glycol (PEG), namely 0%, 5%, 10%, 15%, and 20%. Under drought stress condition, all of tomato lines have a decrease in vegetative growth parameters. The results showed that there was an interaction effect between tomatoes mutant and the level of drought stress on the parameters of plant height, the number of roots, and root length, whereas the number of explant leaves was affected by tomatoes mutant and stress level independently. Lines of iaa9-3 and iaa9-5 were tolerant of drought stress up to a PEG 6000 concentration of 5% PEG, whereas for WT-MT there has been a significant decrease under drought stress of 5% PEG.Keywords : drought stress, auxin, tomato, mutant, poliethylene glycolKondisi cekaman kekeringan pada tanaman tomat dapat menyebabkan pertumbuhan dan produksi tanaman tomat menurun. Salah satu upaya yang dapat dilakukan untuk mengatasi masalah tersebut adalah dengan perakitan varietas tanaman baru yang tahan terhadap cekaman kekeringan. Beberapa hasil mutasi gen IAA pada tomat mutan Micro-Tom mampu menghasilkan tanaman yang toleran terhadap kondisi stress secara abiotik, yaitu pada galur iaa9-3 dan iaa9-5. Penelitian ini dilakukan untuk mengetahui respons pertumbuhan vegetatif pada iaa9-3 dan iaa9-5 dalam kondisi cekaman kekeringan dengan metode in vitro. Penelitian dilaksanakan di Laboratorium Kultur Jaringan dan Teknologi Benih Fakultas Pertanian Universitas Padjadjaran pada bulan September sampai Desember 2019. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok Faktorial yang terdiri dari dua faktor dan diulang tiga kali. Faktor pertama adalah  mutan, yaitu iaa9-3, iaa9-5 dan Wild-Type Micro-Tom (WT-MT) sebagai kontrol, dan faktor kedua adalah tingkat cekaman kekeringan menggunakan konsentrasi polietilen glikol (PEG) yaitu 0%, 5%, 10%, 15%, 20%. Hasil penelitian menunjukkan bahwa terdapat interaksi antara galur dan tingkat cekaman kekeringan pada parameter tinggi tanaman, jumlah akar, dan panjang akar, sedangkan pada jumlah daun eksplan dipengaruhi oleh galur dan tingkat cekaman secara mandiri. Pada kondisi tercekam, semua galur tomat yang diamati mengalami penurunan pada seluruh parameter pertumbuhan terutama pada galur WT-MT.  Galur iaa9-3 dan iaa9-5 toleran terhadap cekaman kekeringan sampai dengan konsentrasi 5% PEG, sedangkan untuk WT-MT sudah mengalami penurunan yang signifikan pada cekaman kekeringan 5% PEG. Kata Kunci: cekaman kekeringan, auksin, tomat, mutan, polyetilen glycol

scholarly journals Accumulation of macronutrients in cowpea and weeds in competition and under soil water deficit

2019 ◽  
Vol 35 (6) ◽  
Author(s):  
Fernando Sarmento de Oliveira ◽  
Erivanessa Costa Sousa Sarmento ◽  
Jeferson Luiz Dallabona Dombroski ◽  
Daniel Valadão Silva ◽  
Claudia Daianny Melo Freitas ◽  
...  
Keyword(s):  
Soil Water ◽  
Water Deficit ◽  
Plant Species ◽  
Vigna Unguiculata ◽  
Block Design ◽  
High Potential ◽  
Soil Water Deficit ◽  
Commelina Benghalensis ◽  
Randomized Block Design ◽  
Nutrient Extraction

The ability of a plant species to succeed in colonization of agroecosystem depends on its efficiency in the use of growth resources even in deficient conditions. The present study aimed to evaluate the effects of competition and water deficit in the soil on the accumulation of macronutrients of Vigna unguiculata L. Walp., Commelina benghalensis L. and Waltheria indica L. The study was conducted in a greenhouse, in randomized block design, with four replications. The treatments were arranged in a 5 × 2 factorial, with the first factor corresponding to types of interaction among species (V. unguiculata + C. benghalensis; V. unguiculata + W. indica; V. unguiculata in monoculture, C. benghalensis in monoculture and W. indica in monoculture), and the second of water regimes (irrigated and water deficit). The water deficit differently affects macronutrient content on the species, with decreased of K, Ca and Mg in cowpea, and N, P, K and Ca in W. indica. For C. benghalensis, the water deficit does not reduce the macronutrient contents on the plant. The competition between plants intensifies the effects of water deficit only on C. benghalensis, with a decreased on the content of all macronutrients studied. Under irrigated conditions, competition between plants was more damaging the weeds compared to cowpea. The C. benghalensis specie, free from interference, has a high potential for nutrient extraction under irrigated and water deficit regimes.

scholarly journals Effect of Foliar Application of Methanol on Changes of Antioxidant Enzymes of Vigna unguiculata L. in Water-Deficit Stress

2019 ◽  
Vol 39 (04) ◽  
Author(s):  
Aliakbar Saneienejad ◽  
Mahmood Tohidi ◽  
Behnam Habibi Khaniani ◽  
Mehdi Sadeghi
Keyword(s):  
Antioxidant Enzymes ◽  
Water Deficit ◽  
Vigna Unguiculata ◽  
Foliar Application ◽  
Block Design ◽  
Water Deficit Stress ◽  
Methanol Treatment ◽  
Randomized Block Design ◽  
Four Levels ◽  
Plot Design

The aim of this study was to investigate the effect of foliar application of methanol on the activity of antioxidant enzymes of Vigna unguiculata L. in water-deficit stress conditions. The trials were performed in a split plot design arranged in completely randomized block design with three replications in two years cultivation (2017 and 2018). Water-deficit stress treatments were considered in the main plots in four levels (25, 50, 75 and 100% of plant water requirement) and combined foliar application of methanol treatment in three levels (control, 10 and 20% vol.), and genotype treatment in two cultivars of Omidbakhsh 1057 and Mashhad in sub plots. The results showed that the effect of water-deficit stress and foliar application of methanol on the activity of antioxidant enzymes were significant (P £ 0.01). The effect of genotype on the activity of ascorbate peroxidase was just significant (P £ 0.01).

Effectiveness of nitrogen and bio-fertilizer choice for improving growth and yield of hybrid rice (Oryza sativa L.) during dry season

2020 ◽  
Vol 57 (4) ◽  
pp. 302-309
Author(s):  
Sukanta Pal ◽  
Megha Sana ◽  
Hirak Banerjee ◽  
Lhingneikim Lhungdim
Keyword(s):  
Yield Components ◽  
Hybrid Rice ◽  
Growth Parameters ◽  
Oryza Sativa L ◽  
Block Design ◽  
Growth And Yield ◽  
Combined Application ◽  
Randomized Block Design ◽  
N Dose ◽  
Dry Seasons

Effect of nitrogen and bio-fertilizer on growth and productivity of hybrid rice (cv. PHB 71) was assessed during dry seasons of 2017 and 2018 at Research Farm of BCKV under new alluvial zone of West Bengal. The experiment was laid out in factorial randomized block design with 12 treatment combinations having 4 levels of N and 3 types of bio-fertilizer replicated thrice. Application at 180 kg N/ha produced tallest plants at 90 DAT with maximum LAI (60 DAT), DMA (90 DAT), tillers/hill (90 DAT) and CGR (30-60 & 60-90 DAT). The same N rate resulted in highest panicles/m2, panicle length, panicle weight, filled grains/panicle and 1000-grain weight. A decrease in N dose from 180 to 150 kg/ha caused reduction in all those yield components; however, the variation was non-significant except for number of panicles/m2. Maximum grain yield, straw yield and harvest index was also achieved with 180 kg N/ha accounting 120.1, 34.9 and 32.8% more than the values obtained with zero-N; however, it was statistically at par with the yields and HI obtained with 150 kg N/ha. The Azospirillum application increased all the growth parameters, yield components and yield of hybrid rice over other tested bio-fertilizers (Azospirillum > PSB > K mobilizer), accounting 5.9 and 8.8% more than the yields obtained with PSB and K mobilizer. The interaction of N and bio-fertilizer exerted significant effect on growth attributes but failed to record any significant variations in yield components and yield of hybrid rice. The maximum economic benefit was achieved with combined application of 180 kg N/ha and Azospirillum.

Effect of Irrigation Methods and Mulching on Growth and Seed Yield of Semialata

2020 ◽  
Vol 7 (01) ◽  
Author(s):  
SK SRIVASTAVA ◽  
PAWAN JEET
Keyword(s):  
Seed Yield ◽  
Drip Irrigation ◽  
Growth Parameters ◽  
Block Design ◽  
Water Requirement ◽  
Furrow Irrigation ◽  
Plastic Mulch ◽  
Randomized Block Design ◽  
Daily Water ◽  
Black Plastic

A study was conducted to assess the effect of drip irrigation and plastic mulch on growth and seed yield of Semialata. Two types of plastic mulch (green and silver/black) were tested at three levels of irrigation (120%, 100% and 80%) by drip irrigation and one level (100%) by furrow irrigation. The daily water requirement of Semialata was estimated by the equation ETcrop= ETox crop factor. ETcrop is crop water requirement mm/day. ETo (reference evapotranspiration, mm/day) was calculated by FAO calculator which uses temperature and humidity data. In this experiments there were twelve treatments were considered. The treatments were replicated thrice. The experiment was laid in randomized block design. It was observed that drip irrigation with or without plastic mulch is yielding better results in terms of growth parameters and seed yield as compared to furrow irrigation without plastic mulch. It was also observed that maximum suppression (67.58%) of weeds resulted with drip irrigation and silver/black plastic mulch at 80% level of irrigation.

scholarly journals Molybdenum mixed with glyphosate and alone via foliar spray in no-tillage common bean grown on corn stover

Revista CERES ◽  
2014 ◽  
Vol 61 (1) ◽  
pp. 62-69
Author(s):  
Gessimar Nunes Camelo ◽  
Geraldo Antonio de Andrade Araújo ◽  
Renildes Lucio Ferreira Fontes ◽  
Luiz Antonio dos Santos Dias ◽  
José Eustáquio de Souza Carneiro ◽  
...  
Keyword(s):  
Common Bean ◽  
Corn Stover ◽  
Field Experiments ◽  
Block Design ◽  
Foliar Spray ◽  
Cumulative Effect ◽  
No Tillage ◽  
Randomized Block Design ◽  
Tillage System ◽  
Mo Content

The effect of molybdenum (Mo) on common bean grown in desiccated corn stover in a no-tillage system was evaluated under two application modes: Mo mixed with the desiccant glyphosate and Mo direct spray to the bean leaves. The treatments (four replicates) were assigned to a completely randomized block design in a split-plot arrangement with the application of Mo (0, 100, 200, 400 and 800 g ha-1) mixed with glyphosate in the main plots and Mo foliar spray (0 and 100 g ha-1) in the sub-plots. The field experiments were carried out in 2009 and 2010 in the municipality of Coimbra, Minas Gerais State, with the common bean cultivar Ouro Vermelho. Mo mixed with glyphosate had neither an effect on common bean yield nor on the Mo and N contents in leaves, however it increased the Mo and N contents in seeds. Application of Mo via foliar spray increased Mo content in leaves and Mo and N contents in seeds. The reapplication of molybdenum with glyphosate for desiccation in subsequent crops caused a cumulative effect of Mo content in bean seeds.

scholarly journals Methionine-induced regulation of growth, secondary metabolites and oxidative defense system in sunflower (Helianthus annuus L.) plants subjected to water deficit stress

PLoS ONE ◽  
2021 ◽  
Vol 16 (12) ◽  
pp. e0259585
Author(s):  
Gull Mehak ◽  
Nudrat Aisha Akram ◽  
Muhammad Ashraf ◽  
Prashant Kaushik ◽  
Mohamed A. El-Sheikh ◽  
...  
Keyword(s):  
Drought Stress ◽  
Helianthus Annuus ◽  
Water Deficit ◽  
Soluble Sugars ◽  
Foliar Spray ◽  
Shoot Length ◽  
Stress Conditions ◽  
Growth And Yield ◽  
Water Deficit Stress ◽  
Growth Stages

Optimum water availability at different growth stages is one the major prerequisites of best growth and yield production of plants. Exogenous application of plant growth regulators considered effective for normal functioning of plants under water-deficit conditions. A study was conducted to examine the influence of exogenously applied L-methionine on sunflower (Helianthus annuus L.) plants grown under water-deficit conditions. Twenty-five-day old seedlings of four sunflower cultivars, FH331, FH572, FH652 and FH623 were exposed to control (100% F.C.) and drought stress (60% F.C.) conditions. After 30-day of drought stress, L-methionine (Met; 20 mg/L) was applied as a foliar spray to control and drought stressed plants. Water deficit stress significantly reduced shoot fresh and dry weights shoot and root lengths, and chlorophyll a content in all four cultivars. While a significant increase was observed due to water deficiency in relative membrane permeability (RMP), malondialdehyde (MDA), total soluble proteins (TSP), total soluble sugars (TSS), ascorbic acid (AsA) and activity of peroxidase (POD). Although, exogenously applied Met was effective in decreasing RMP, MDA and H2O2 contents, it increased the shoot fresh weight, shoot length, chlorophyll a, chlorophyll a/b ratio, proline contents and the activities of SOD, POD and CAT enzymes in all four cultivars under water deficit stress. No change in AsA and total phenolics was observed due to foliar-applied Met under water stress conditions. Of all sunflower cultivars, cv. FH-572 was the highest and cv. FH-652 the lowest of all four cultivars in shoot fresh and dry weights as well as shoot length under drought stress conditions. Overall, foliar applied L-methionine was effective in improving the drought stress tolerance of sunflower plants that was found to be positively associated with Met induced improved growth attributes and reduced RMP, MDA and H2O2 contents under water deficit conditions.

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

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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