scholarly journals Intensity and duration of water deficit on the pathosystem sugarcane x Meloidogyne incognita

2015 ◽  
Vol 19 (6) ◽  
pp. 581-586 ◽  
Author(s):  
Matheus P. Quintela ◽  
Elvira M. R. Pedrosa ◽  
Lilia Willadino ◽  
Mario M. Rolim ◽  
Ênio F. de F. e Silva ◽  
...  
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Water Deficit ◽  
Ascorbate Peroxidase ◽  
Peroxidase Activity ◽  
Meloidogyne Incognita ◽  
Sugarcane Variety ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Water Treatments

ABSTRACT This study aimed to evaluate the interaction between intensity and duration of water deficit (90, 56 and 22% of pot capacity [PC] for 30, 60 and 90 days under continuous stress) associated to the parasitism of the nematode Meloidogyne incognita on the growth of the sugarcane variety RB92579 and the activity of the enzymes catalase and ascorbate peroxidase. The experiment was conducted in completely randomized design in a 7 x 2 factorial scheme (seven water deficit treatments: control [90% PC], 56% PC for 30, 60 and 90 days, 20% PC for 30, 60 and 90 days; and two densities of M. incognita: 0 and 20000 eggs plant-1), with four replicates. The water stress corresponding to 56% PC for 30 or 60 days did not affect RB92579 development. The evaluated water treatments increased ascorbate peroxidase activity, but it did not affect catalase activity. Nematode inoculation did not affect RB92579 responses to drought stress conditions. The higher severity of water deficit (22% PC for 90 days) reduced M. incognita reproduction.

scholarly journals Adaptation of Cowpea (Vigna unguiculata (L.) Walp.) to Water Deficit during Vegetative and Reproductive Phases Using Physiological and Agronomic Characters

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
Vincent Ezin ◽  
Artoche Gloria Christelle Tosse ◽  
Ifagbémi Bienvenue Chabi ◽  
Adam Ahanchede
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Water Deficit ◽  
Vigna Unguiculata ◽  
Agronomic Traits ◽  
International Institute ◽  
Relative Water ◽  
Cowpea Varieties ◽  
Reproductive Phases ◽  
Water Treatments

Cowpea (Vigna unguiculata (L.) Walp.) is an important commodity in West Africa. Its seeds are a valuable source of protein, vitamins, and income for humans. However, cowpea cultivation in Benin faces climatic constraints such as water stress caused by a prolonged absence of rain during the rainy season. Thus, this work aims at selecting cowpea varieties that can be cultivated in times of drought without compromising their yields and yield components. Twenty cowpea varieties were used, including 17 improved cultivars and 3 landraces. The experiment was conducted at the International Institute of Tropical Agriculture in Benin and laid at a split-plot design with four replicates. Each genotype was exposed to three water treatments: fully irrigated control, vegetative stress (when plants were 23 days old, drought stress was imposed for 30 days), and reproductive stress (once the first flowers were observed, water stress was imposed for 30 days). The results showed that photochemical yield, chlorophyll content, and relative water content were reduced under water deficit at the vegetative and reproductive stages. But there were no significant differences in proline content among cowpea varieties. Agronomic traits such as number of days to flowering, number of pods, yield per plant, the weight of 100 seeds, and harvest time showed significant differences under water stress. Overall, the landraces and cultivars including Kpodjiguegue, KVX 61-1, and IT 06-K-242-3 were the most tolerant to drought stress at the vegetative and reproductive stages and could potentially be used in breeding programs to improve drought tolerance of cowpeas.

scholarly journals IDENTIFICAÇÃO DE GENÓTIPOS DE FEIJÃO-CAUPI TOLERANTES E SUSCETÍVEIS AO DÉFICIT HÍDRICO

Nativa ◽  
2018 ◽  
Vol 6 (6) ◽  
pp. 608
Author(s):  
Eveline Nogueira Lima ◽  
Kátia Regina Alves Pires ◽  
Elaine Facco Celin ◽  
Cândida Hermínia Campos de Magalhães Bertini ◽  
Rosilene Oliveira Mesquita
Keyword(s):  
Polyethylene Glycol ◽  
Water Stress ◽  
Water Deficit ◽  
Vigna Unguiculata ◽  
The Other ◽  
Distilled Water ◽  
Water Deficiency ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Selection Of

Objetivou-se com esse trabalho identificar genótipos de feijão-caupi tolerantes e suscetíveis ao déficit hídrico, utilizando-se duas metodologias, estresse hídrico simulado com o uso de PEG6000 (Polietilenoglicol) e Screening Box. Os experimentos foram conduzidos em casa de vegetação no delineamento inteiramente casualizado com três repetições. Para a metodologia com PEG6000 foram utilizados 15 genótipos e duas testemunhas, com três repetições, totalizando 90 amostras. Foram selecionadas seis plântulas por genótipo, utilizaram-se três caixas contendo apenas água destilada e outras três com nível de potencial osmótico de - 0,2 MPa de PEG6000. A avaliação foi feita até atingir o ponto máximo de crescimento das raízes. Para a metodologia de Screening Box foram utilizados 15 genótipos, onde estes foram avaliados quanto à tolerância ao déficit hídrico no estádio de plântula. As duas metodologias mostraram-se eficientes na seleção de genótipos de feijão-caupi, os genótipos Santo Inácio Vermelho e BRS Tumucumaque, foram os mais sensíveis à seca, em ambas as metodologias.Palavras-chave: Vigna unguiculata, seca, plântulas. COWPEA GENOTYPES TOLERANT AND SUSCEPTIBLE TO WATER DEFICIT ABSTRACT: Objective to identify tolerant and susceptible cowpeas genotypes to water deficiency at the seedlings stage of growth, using two methodologies such as (a) water stress with the use of PEG6000 (Polyethylene glycol) and the Screening Box were used in the present research. The experiments were conducted in greenhouse environments using a completely randomized design with three replications. For the PEG6000 approach, 15 genotypes and two controls treatments were used in three replications in a total of 90 samples. Six seedlings were selected per genotype by using three boxes containing only distilled water. In the other treatment, three level of osmotic potential of -0.2 MPa of PEG6000. The evaluations of the trials were done until the Screening Box approach, 15 genotypes were used and were evaluated for tolerance to water deficit at the seedling stage of growth. The two methodologies were efficient in the selection of cowpea genotypes, the genotypes Santo InácioVermelho and BRS Tumucumaque were the most sensitive to drought in both methodologies.Keywords: drought, Vigna unguiculata, seedlings.

scholarly journals Assessment of Salicylic Acid Impacts on Seedling Characteristic of Cucumber (Cucumis sativus L.) under Water Stress

2012 ◽  
Vol 4 (1) ◽  
pp. 112-115 ◽  
Author(s):  
Hossein MARDANI ◽  
Hassan BAYAT ◽  
Amir Hossein SAEIDNEJAD ◽  
Ehsan Eyshi REZAIE
Keyword(s):  
Salicylic Acid ◽  
Water Stress ◽  
Water Deficit ◽  
Cucumis Sativus ◽  
Foliar Application ◽  
Dry Weight ◽  
Water Deficit Stress ◽  
Cucumis Sativus L ◽  
Water Stress Tolerance ◽  
Randomized Design

Impacts of various concentrations of salicylic acid (SA) on cucumber (Cucumis sativus L.) seedling characteristic were evaluated under different water stress levels by using a factorial arrangement based on completely randomized design with three replications at experimental greenhouse of Ferdowsi University of Mashhad, Iran. The studied factors included three water deficit levels (100% FC, 80% FC, and 60% FC) considered as first factor and five levels of SA concentrations (0, 0.25, 0.5, 0.75, and 1 mM) as second factor. Results showed that foliar application of SA at the highest concentration enhanced leaf area, leaf and dry weight while decreased stomatal conductance under high level of water deficit stress. Though, severe water deficit stress sharply raised the SPAD reading values. In general, exogenous SA application could develop cucumber seedling characteristic and improve water stress tolerance.

scholarly journals Respon Anatomi dan Fisiologi Akar Kedelai terhadap Cekaman Kekeringan

2016 ◽  
Vol 43 (3) ◽  
pp. 186
Author(s):  
Pienyani Rosawanti ◽  
Munif Ghulamahdi ◽  
Nurul Khumaida
Keyword(s):  
Drought Stress ◽  
Lipid Peroxides ◽  
Root Damage ◽  
Demand And Supply ◽  
Anatomical Changes ◽  
Anatomy And Physiology ◽  
Randomized Design ◽  
Two Factors ◽  
Soybean Genotypes ◽  
Completely Randomized Design

<p>ABSTRACT</p><p>Drought stress in crop occurs due to imbalance between demand and supply of water. Crop responses to drought stress depend on their genotypes. Drought stress causes anatomical changes and root damage. The objective of this research was to study the effect of drought stress on anatomy and physiology of soybean root. The research was conducted at Laboratory of Microtechnique, Department of Agronomy and Horticulture, Bogor Agricultural University in November 2013. A Completely Randomized Design with two factors was used in the research i.e. soybean genotypes (Wilis, PG 57-1, SC 39-1) and PEG (0, 20%) with three replications. The result showed that genotype and PEG affected the size of the cortex, stele, and xylem. PG 57-1 genotype showed the decrease of cortical thickness, diameter of stele and the diameter of xylem, on the other hand, in SC 39-1, there was an increase. Drought stress (PEG 20%) could also cause damage to the root membrane as indicated by the occurrence of lipid peroxides. Wilis and PG 57-1 were tolerant while SC 39-1 was sensitive to drought stress.</p><p>Keywords:cortex, lipid peroxides, PEG, Schiff’s reagent, xylem</p>

scholarly journals Improvement of drought tolerance in rice using line X tester mating design and biochemical molecular markers

2022 ◽  
Vol 46 (1) ◽  
Author(s):  
Almoataz Bellah Ali El-Mouhamady ◽  
Abdul Aziz M. Gad ◽  
Ghada S. A. Abdel Karim
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Drought Tolerance ◽  
Stress Tolerance ◽  
Water Deficit ◽  
Scientific Progress ◽  
Crop Productivity ◽  
Hybrid Generation ◽  
Water Stress Tolerance ◽  
Rice Genotypes

Abstract Background Water stress, specifically the limited water resources needed to grow strategic crops, especially rice, poses a great threat to crop productivity. So, it was imperative that scientists all work together to try genetically improving the rice for drought tolerance in light of these environmental challenges. The aim of this study is trying to know the genetic behavior responsible for water-deficit tolerance in rice genotypes but at the molecular level. Moreover, this attempt will be an important leap in the process of genetic improvement in rice for water stress tolerance in Egypt. Results Twenty-three rice genotypes including eight parents and their fifteen F1 crosses or (the first hybrid generation) by line X tester analysis were evaluated for water stress tolerance during two experiments (the control and drought experiment) besides some molecular–biochemical studies for eight parents and the highest selected five crosses for water stress tolerance. The research revealed that five rice crosses out of fifteen hybrids were highly tolerant to water stress compared to the normal conditions. Data of biochemical markers indicated the presence of bands that are considered as molecular genetic markers for water-deficit tolerance in some rice genotypes, and this is the scientific progress achieved in this research. This was evident by increasing the density and concentration of SDS-protein electrophoresis besides enhancing the activities of peroxidase (POD) and polyphenol oxidase (PPO) under water-deficit conditions, which confirmed the tolerance of drought stress in the eight rice genotypes and the best five crosses from the first hybrid generation. Conclusion The five promising and superior rice hybrids showed an unparalleled tolerance to water stress in all evaluated traits under water stress treatment compared to the standard experiment. Also, biochemical and molecular parameters evidence confirmed the existence of unquestionable evidence that it represents the main nucleus for producing rice lines tolerated for drought stress under Egyptian conditions.

scholarly journals Screening of marigold (Tagetes erecta L.) cultivars for drought stress based on vegetative and physiological characteristics

2018 ◽  
Vol 3 (2) ◽  
pp. 56 ◽  
Author(s):  
Adnan Younis ◽  
Atif Riaz ◽  
Muhammad Qasim ◽  
Farakh Mansoor ◽  
Faisal Zulfiqar ◽  
...  
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Tagetes Erecta ◽  
Drought Treatment ◽  
Chlorophyll Contents ◽  
Drought Tolerant ◽  
Randomized Design ◽  
Cultivar Selection ◽  
Tagetes Erecta L ◽  
Water Scarce

<p>Drought tolerance is an important genotypic character to be exploited for the plant cultivar selection under water deficit conditions. In the recent study, we examined the response of two marigold cultivars (Inca and Bonanza) under different regimes of drought stress. The aim was to determine the best performing cultivar under water/drought stress. Three irrigation treatments include; 4 days (T<sub>1</sub>), 6 days (T<sub>2</sub>) and 8 days (T<sub>3</sub>) in comparison to control 1 day (T<sub>0</sub>) interval were imposed. Response characters under study were morphological, physiological and anatomical. Complete Randomized Design (CRD) with four replications in two factorial arrangements was followed for experiment layout. The results revealed that increasing water stress adversely affect plant height, in both cultivars. Both cultivars showed a decreasing trend to the number of flowers under water stress. Total chlorophyll contents including a, b were also showed reduction under prolonged drought treatment in both cultivars from (2.7 mg g<sup>-1</sup> FW) to (1 mg g<sup>-1</sup> FW). Overall, the performance of cultivar (cv.) Inca was satisfactory under water stress regimes. These results are helpful for selecting drought tolerant marigold cultivars in water scarce areas.   </p>

scholarly journals POTENCIAL HÍDRICO FOLIAR EM MILHO SUBMETIDO AO DÉFICIT HÍDRICO

Irriga ◽  
2010 ◽  
Vol 15 (3) ◽  
pp. 324-334
Author(s):  
Juliano Dalcin Martins ◽  
Reimar Carlesso ◽  
Alberto Eduardo Knies ◽  
Zanandra Boff de Oliveira ◽  
Tiago Broetto ◽  
...  
Keyword(s):  
Water Potential ◽  
Water Deficit ◽  
Leaf Water Potential ◽  
Irrigation Management ◽  
Leaf Water ◽  
Maize Leaf ◽  
Randomized Design ◽  
Development Cycle ◽  
Rainout Shelter ◽  
Completely Randomized Design

O potencial hídrico foliar pode ser considerado como um parâmetro de indicação da condição hídrica das culturas. Este trabalho teve como objetivo estudar o potencial hídrico foliar das plantas de milho sobre déficit hídrico no estágio inicial de desenvolvimento reprodutivo. O experimento foi conduzido no interior de uma cobertura móvel “Rainout shelter”, utilizando o delineamento experimental inteiramente casualizado, com dois tratamentos e quinze repetições. Os tratamentos foram constituídos de dois manejos da água de irrigação: (i) irrigado (as plantas de milho receberam irrigação conforme suas necessidades durante todo o ciclo de desenvolvimento); (ii) déficit hídrico aplicado antes do pendoamento.   O déficit hídrico teve uma duração de aproximadamente 50 mm de ETo acumulada. A cobertura móvel foi acionada quando da ocorrência de chuvas, impedindo que esta ocorresse sobre a área experimental. Determinou-se o conteúdo de água disponível nas camadas de 0-10, 10-25, 25-55 e 55-85 cm de profundidade e variação diária do potencial hídrico das folhas de milho. Não foram observadas diferenças entre os tratamentos para o potencial de água na folha. O potencial hídrico foliar em plantas de milho não apresenta variação para déficit hídrico de 50 mm de evapotranspiração de referência acumulada.   UNITERMOS: déficit hídrico, potencial hídrico foliar, milho, irrigação.     MARTINS, J. D.; CARLESSO. R.; KNIES, A. E.; OLIVEIRA, Z. B.; BROETTO, T.; RODRIGUES, G. J. LEAF WATER POTENTIAL IN MAIZE EXPOSED TO WATER DEFICIT 2 ABSTRACT   The leaf water potential can be considered as a parameter for indicating the crops water condition. This work aimed to study the maize leaf water potential on water deficit in the reproductive developmentinitial stage. The experiment was conducted within a mobile coverage "rainout shelter" using a completely randomized design with two treatments and fifteen repetitions. The treatments consisted of two water irrigation management: (i) irrigated (maize was irrigated as needed throughout the development cycle), (ii) water stress applied before tasseling. The drought lasted approximately 50 mm of accumulated reference evapotranspiration (ETo). The mobile coverage was triggered when rainfall occurred, preventing water from falling into the experimental area. Available water was determined  in layers of 0-10, 10-25, 25-55 and 55-85 cm depth and daily variation of water potential in maize leaves were also  evaluated. There were no differences between treatments for leaf water potential. The maize leaf water potential presented no change to water deficit equivalent to 50 mm of accumulated ETo.  KEYWORDS: water deficit, leaf water potential, maize, irrigation.

Growth Indices of Kimiya Cultivar of Lentil in Response to Drought Stress at Flowering and Pod Filling Stages under Greenhouse Conditions

2019 ◽  
Author(s):  
Hossein Jahantigh ◽  
Seyed Reza Amiri
Keyword(s):  
Growth Rate ◽  
Drought Stress ◽  
Plant Growth ◽  
Field Capacity ◽  
Flowering Stage ◽  
Growth Indices ◽  
Relative Growth ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Net Assimilation

Drought stress is one of the most important environmental factors which can limit the lentil production. To evaluate the effect of drought stress at flowering and pod filling stages on growth indices of lentil cultivar Kimiya (a new high yielding lentil cultivar for moderate cold and semi warm climate of Iran), an experiment was conducted at the research greenhouse of Higher Educational Complex of Saravan in completely randomized design with four replications. The drought stress was applied by withholding irrigation until the soil moisture reached to 20% of field capacity at stages of flowering and pod filling. In this experiment, we measured grain yield per plant, growth indices including plant leaf area (PLA), relative growth rate (RGR), plant growth rate (PGR), and net assimilation rate (NAR). Results showed that the flowering stage in lentil plant is more sensitive to drought as exhibited significant decline in PLA, RGR, PGR and NAR. PGR declined at the end of growing season when vegetative growth stop, senescence of leaves, the reduction of NAR, and the allocation of assimilate to the seeds.

scholarly journals Physiological potential of popcorn seeds submitted to water stress after treated with bioregulator

2019 ◽  
Vol 40 (2) ◽  
pp. 573 ◽  
Author(s):  
Bruno Ribeiro Ferreira ◽  
Carolina Chichanoski ◽  
Lia Mara Moterle ◽  
Renato Frederico dos Santos ◽  
Alessandro Lucca Braccini
Keyword(s):  
Water Stress ◽  
Osmotic Potential ◽  
Primary Root ◽  
Water Restriction ◽  
High Productivity ◽  
Randomized Design ◽  
Key Points ◽  
Crop Development ◽  
Completely Randomized Design ◽  
Primary Root Length

Seed performance is one of the key points for high productivity in crop development. The objective of this study was to evaluate the physiological potential of popcorn cultivar seeds (IAC 125 and BRS-Ângela) treated with Stimulate® bioregulator under water stress. Popcorn seeds were submitted to different osmotic potential levels 0; -0.1; -0.3; -0.6 and -0.9 MPa and induced by mannitol, after being treated with bioregulator at the dose of 1.5 L 100 kg-1 of seeds. The experiment was conducted in a completely randomized design, in a 5 × 2 × 2 factorial design (osmotic potential levels x cultivars x absence and presence of bioregulator). The variables evaluated were: first count and final count of germination standard, shoot length, primary root length, and dry biomass of seedlings. Treating popcorn seeds with bioregulator is inefficient in improving the physiological potential under normal conditions and little water restriction, but under conditions in which water may be limited, the use of bioregulator positively influences germination, growth, and initial performance of seedlings.

scholarly journals EFFECTS OF WATER DEFICIT ON MAZE SEEDLINGS GROWTH TRAITS

2020 ◽  
Vol 2020 (1) ◽  
Author(s):  
F Shafique ◽  
Q Ali ◽  
A Malik
Keyword(s):  
Water Stress ◽  
Drought Stress ◽  
Water Deficit ◽  
Irrigation Water ◽  
Stress Conditions ◽  
Growth And Yield ◽  
Maize Growth ◽  
Maize Genotypes ◽  
Maize Genotype ◽  
Maize Varieties

Many biotic and abiotic factors affect plant growth and its development. Maize growth usually increased under excess water availability but less tolerant against water deficit stress condition. In this study, we investigated the effects of water stress on the growth and yield of maize. We found that severe water stress during the seedling stage had a greater effect on the growth and development of maize. Three maize varieties (Pak afghoi, Neelum, White corn) were used to find out the effects on growth of plant under drought or water deficit environmental conditions. Different drought stress treatments (Control, 20% irrigation water, 40% irrigation water, 60% irrigation water, 80% irrigation water) were imposed to growing seedlings after germination. The treatments were applied after 4 times each after 7 days interval and data for different morphological traits was recorded each time. The recorded data was pooled and analyzed for analysis of variance to access the significance of results. The ANOVA indicated the differences among five different genotypes and 5 different treatments for all parameters were significant. Tukey’s test indicated that maize genotype White corn was more tolerant while genotype Neelum was more sensitive for drought stress conditions therefore, white corn maize genotype may be helpful for the development of drought tolerance maize varieties and hybrids. Positive and significant correlation was found for shoot length with all other studied traits under drought stress conditions. Treatment control, 80% and 60% irrigation water was less adverse for maize growth while treatment 20% irrigation water highly affected all maize genotypes, therefore maize genotypes may be grow under treatment 60% irrigation water.

Sign in / Sign up

Export Citation Format

Share Document