scholarly journals Germination and antioxidant action in melon seeds exposed to salt stress

2016 ◽  
Vol 46 (3) ◽  
pp. 336-342 ◽  
Author(s):  
Daniel Teixeira Pinheiro ◽  
Aparecida Leonir da Silva ◽  
Laércio Junio da Silva ◽  
Marcelo Coelho Sekita ◽  
Denise Cunha Fernandes dos Santos Dias
Keyword(s):  
Superoxide Dismutase ◽  
Salt Stress ◽  
Cucumis Melo ◽  
Germination Rate ◽  
Antioxidant Action ◽  
Induced Stress ◽  
Melon Seeds ◽  
Cucumis Melo L ◽  
Osmotic Potentials ◽  
Seeds Germination

ABSTRACT Salinity influences all germination stages and may adversely affect the seedlings establishment in the field. This study aimed at assessing the effects of salt stress on the physiological potential of melon (Cucumis melo L.) seeds. Germination and activity of superoxide dismutase (SOD), catalase (CAT) and peroxidase (POX) enzymes were assessed at the osmotic potentials of 0.0 MPa, -0.1 MPa, -0.2 MPa, -0.3 MPa, -0.4 MPa and -0.5 MPa. The enzymatic activity was assessed after 24 h, 48 h and 72 h of imbibition. Seed germination was zero at -0.5 MPa and 91 % and 85 % at -0.1 MPa and -0.2 MPa, respectively. In general, the activity of SOD, CAT and POX enzymes increased with the salt-induced stress, in the different times of imbibition, and these increases were more evident at -0.4 MPa and -0.5 MPa. The salt stress induced by NaCl diminishes the germination rate of melon seeds, particularly from the osmotic potential of -0.2 MPa. There is a significant increase in the activity of SOD, CAT and POX enzymes, mainly after 48 h of exposure.

scholarly journals Muskmelon seed germination and seedling development in response to seed priming

2003 ◽  
Vol 60 (1) ◽  
pp. 71-75 ◽  
Author(s):  
Warley Marcos Nascimento
Keyword(s):  
Seed Germination ◽  
Cucumis Melo ◽  
Germination Rate ◽  
Fungal Growth ◽  
Seed Priming ◽  
Seedling Development ◽  
Factors Affecting ◽  
Total Seed ◽  
Cucumis Melo L ◽  
Osmotic Potentials

Important factors affecting seed priming have not been extensively reported in muskmelon (Cucumis melo L.) studies. The optimization of the seed priming technique becomes very important at the commercial scale. Little information has been reported on seedling development of muskmelon subsequent to seed priming. Seeds of muskmelon were primed in darkness at 25°C in different solutions and three osmotic potentials. Seeds were also primed with and without aeration during different periods. In relation to osmotic solutions, an osmotic potential around -1.30 MPa is most adequate for muskmelon priming. Salt solutions gave better germination rate but were deleterious for seed germination, especially at higher osmotic potentials. Aeration of the soaking salt solution gave faster germination at 17°C, and because of the early germination, these treatments probably presented a better seedling development. Deleterious effect on total seed germination was observed for long soaking periods with aeration. Fungal growth increased on seeds primed in aerated solutions. Seeds from priming treatments had a better germination rate and seedling development under 17 and 25°C.

scholarly journals ÁGUA SALINA E SUBSTRATOS NO CRESCIMENTO INICIAL DO MELOEIRO

Irriga ◽  
2017 ◽  
Vol 22 (3) ◽  
pp. 469-484 ◽  
Author(s):  
Maria Ângela Casimiro Lopes ◽  
Rafael Vitor da Silveira Muniz ◽  
Samara Sibelle Vieira Alves ◽  
Aline Costa Ferreira ◽  
Francisco Vanies da Silva Sá ◽  
...  
Keyword(s):  
Salt Stress ◽  
Organic Compound ◽  
Irrigation Water ◽  
Cucumis Melo ◽  
Dry Matter ◽  
Water Salinity ◽  
Dry Matter Accumulation ◽  
Initial Growth ◽  
Irrigation Water Salinity ◽  
Cucumis Melo L

ÁGUA SALINA E SUBSTRATOS NO CRESCIMENTO INICIAL DO MELOEIRO   MARIA ÂNGELA CASIMIRO LOPES1; RAFAEL VITOR DA SILVEIRA MUNIZ1; SAMARA SIBELLE VIEIRA ALVES2; ALINE COSTA FERREIRA1; FRANCISCO VANIES DA SILVA SÁ3 E LUDERLÂNDIO DE ANDRADE SILVA3 1 Unidade Acadêmica de Ciências Agrárias, Universidade Federal de Campina Grande, UFCG, Pombal, PB, Brasil, [email protected], [email protected], [email protected] Unidade Acadêmica de Garanhuns, Universidade Federal Rural do Pernambuco, UFRPE, Garanhuns, PE, Brasil, [email protected] Centro de Ciências e Recursos Naturais, Universidade Federal de Campina Grande, UFCG, Campina Grande, PB, Brasil, [email protected], [email protected]  1 RESUMO Objetivou-se estudar a produção de mudas de meloeiro em função de diferentes substratos irrigados com água salina. O experimento foi desenvolvido em casa de vegetação no município de Pombal, Paraíba PB, no período de abril a maio de 2015. Adotou-se o delineamento experimental inteiramente casualizado, em esquema fatorial 4 x 3 x 2 constituído de quatro níveis de salinidade da água de irrigação - CEa (0,3; 1,5; 3,0 e 4,5 dS m-1) e três substratos [S1= solo; S2= solo + composto orgânico (2:1); e S3 = solo + esterco bovino (2:1)], e duas variedades de melão (V1= Melão Gaúcho Casca de Carvalho; V2= Hales Best Jumbo), com quatro repetições e três plantas úteis por repetição. As plantas foram conduzidas em recipientes com capacidade de 0,5 dm3 durante 32 dias após a semeadura, quando foram avaliadas quanto ao crescimento e acúmulo de matéria seca. O crescimento e o acúmulo de matéria seca de ambas as variedades foram reduzidos com o aumento da salinidade da água de irrigação. O crescimento e acúmulo de massa seca da variedade Hales Best Jumbo no substrato constituído de solo com composto orgânico foi menos afetado pelo estresse salino. A variedade Gaúcho Casca de Carvalho é a mais sensível ao estresse salino independente do substrato utilizado. Palavras-chave: Cucumis melo L.; estresse salino, composto orgânico.  LOPES, M. A. C.; MUNIZ, R. V. S.; ALVES, S. S. V.; FERREIRA, A. C.; SÁ, F. V. S.; ANDRADE SILVA, L. A.SALINE WATER AND SUBSTRATES ON INITIAL GROWTH IN MELON  2 ABSTRACT The aim was to study the production of melon seedlings for different substrates irrigated with saline water. The experiment was conducted in a greenhouse in the city of Pombal, Paraíba, PB, in the period April-May 2015. We adopted a completely randomized design in a factorial 4 x 3 x 2 design, consisting of four levels of irrigation water salinity (0.3, 1.5, 3.0 and 4.5 dS m-1) and three substrates [S1= ground; S2= soil + organic compound (2:1); and S3= soil + manure (2:1)] , and two varieties of melon (V1 = Gaúcho Casca de Carvalho; V2 = Hales Best Jumbo), with four replications and three plants per repetition. Plants were kept in containers with a capacity of 0.5 dm3 for 32 days after sowing, when they were evaluated for growth and accumulation of dry matter. Growth and dry matter accumulation of both varieties were reduced with increasing irrigation water salinity. The growth and accumulation of dry mass of the Hales Best Jumbo variety in the substrate composed of soil with organic compost was less affected by salt stress. The Gaúcho Casca de Carvalho variety is the most sensitive to salt stress regardless of the substrate used. Keywords: Cucumis melo L., salt stress, organic compound

scholarly journals Identification and Analysis of Powdery Mildew Resistance in Melon (Cucumis melo L.) Cultivar Meloni

BIOEDUSCIENCE ◽  
2020 ◽  
Vol 4 (1) ◽  
pp. 1-10
Author(s):  
Muhammad Alif Ishak ◽  
Budi Setiadi Daryono
Keyword(s):  
Powdery Mildew ◽  
Cucumis Melo ◽  
Powdery Mildew Resistance ◽  
Morphological Characters ◽  
Lateral Part ◽  
Tolerance Level ◽  
Melon Seeds ◽  
Cucumis Melo L ◽  
Powdery Mildew Infection ◽  
Level Resistance

Background: A powdery mildew-resistant cultivar of melon is needed to increase melon yield crops. Meloni is a superior melon cultivar bred through a crossing between ♀ SL-3 and ♂ PI 371795, resulted by the Laboratory of Genetics and Breeding, Faculty of Biology, UGM. This study aimed to determine the level resistance of Meloni to powdery mildew infection and to identify the powdery mildew species that infected Meloni based on morphological characters. Methods: Meloni seeds were germinated and planted in the greenhouse of PIAT UGM. Powdery mildew spores were inoculated into the leaves after ±2 weeks of age. Leaf infected were scored using the gridline every 3 days for 6 weeks. Scoring results were converted to the diseases index score. Furthermore, powdery mildew species was identified using morphological characters. Results: Meloni had a tolerance level of resistance to the powdery mildew infection. Based on the morphological characters with fibrosin bodies, conidia ovoid-shape and the position of the germ tube in the lateral part of the conidia, powdery mildew that infected Meloni was expected as P. xanthii. Conclusions: Meloni can be expected as an alternative to superior melon seeds resistant to pest and disease infections especially powdery mildew.  

scholarly journals Size, imbibition, and viability of seeds of two creole melon (Cucumis melo L.) from the state of Guerrero, Mexico

2021 ◽  
Vol 13 (12) ◽  
Author(s):  
José L. Escobar-Álvarez ◽  
Omar Ramírez-Reynoso ◽  
Paulino Sánchez-Santillán ◽  
Rocío Cuellar-Olalde ◽  
Teolincacíhuatl Romero-Rosales ◽  
...  
Keyword(s):  
Cucumis Melo ◽  
Positive Association ◽  
Costa Chica ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
Student’S T ◽  
Melon Seeds ◽  
Cucumis Melo L

Objective: To determine the physical and physiological characteristics of Creole melon seeds from the Costa Chica ofGuerrero.Design/Methodology/Approach: It was established under a completely randomized design, and Student’s t-tests (a=0.05) and correlation with Pearson’s test were performed. Viability and imbibition were carried out using the methodologies described by the International Seed Testing Association (ISTA).Results: Creole seeds of the two varieties presented a significant statistical difference (95% confidence level) in the physical quality variables. The imbibition ended at 18 and 32 h in V2 and V1, respectively, after being submerged in water. The humidity percentage was higher in V1 (7.19); while, V2 presented a higher percentage of germination and viability (96 and 90%, respectively). There is a positive association between the humidity and the physical dimensions of the seed and the germination and viability (r2=0.954) that is highly significant (P=0.003).Study Limitations/Implications: Morphological and taxonomic classification studies of the Creole genotypes of the Costa Chica region of Guerrero are required.Findings/Conclusions: There was a positive correlation between the physical and physiological quality of the Creole melon seeds.

scholarly journals Distinctive Traits for Drought and Salt Stress Tolerance in Melon (Cucumis melo L.)

2021 ◽  
Vol 12 ◽  
Author(s):  
Sergio Chevilly ◽  
Laura Dolz-Edo ◽  
Gema Martínez-Sánchez ◽  
Luna Morcillo ◽  
Alberto Vilagrosa ◽  
...  
Keyword(s):  
Salt Stress ◽  
Stress Tolerance ◽  
Cucumis Melo ◽  
Amino Acid Profile ◽  
Limiting Factors ◽  
Sodium Potassium ◽  
Drought And Salt Stress ◽  
Salt And Drought Stress ◽  
Cucumis Melo L ◽  
Physiological And Biochemical

Melon (Cucumis melo L.) is a crop with important agronomic interest worldwide. Because of the increase of drought and salinity in many cultivation areas as a result of anthropogenic global warming, the obtention of varieties tolerant to these conditions is a major objective for agronomical improvement. The identification of the limiting factors for stress tolerance could help to define the objectives and the traits which could be improved by classical breeding or other techniques. With this objective, we have characterized, at the physiological and biochemical levels, two different cultivars (sensitive or tolerant) of two different melon varieties (Galia and Piel de Sapo) under controlled drought or salt stress. We have performed physiological measurements, a complete amino acid profile and we have determined the sodium, potassium and hormone concentrations. This has allowed us to determine that the distinctive general trait for salt tolerance in melon are the levels of phenylalanine, histidine, proline and the Na+/K+ ratio, while the distinctive traits for drought tolerance are the hydric potential, isoleucine, glycine, phenylalanine, tryptophan, serine, and asparagine. These could be useful markers for breeding strategies or to predict which varieties are likely perform better under drought or salt stress. Our study has also allowed us to identify which metabolites and physiological traits are differentially regulated upon salt and drought stress between different varieties.

scholarly journals Karakter morfologi, heritabilitas dan indeks seleksi terboboti beberapa generasi F1 Melon (Cucumis melo L.)

Jurnal Agro ◽  
10.15575/6244 ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 42-51
Author(s):  
Achmad Amzeri ◽  
Kaswan Badami ◽  
Syaiful Khoiri ◽  
Ahmad Syaiful Umam ◽  
Nasirul Wahid ◽  
...  
Keyword(s):  
Cucumis Melo ◽  
Experimental Field ◽  
Materials Used ◽  
Melon Seeds ◽  
Cucumis Melo L

Perakitan varietas melon hibrida dengan karakter-karaker unggul merupakan suatu upaya untuk memenuhi kebutuhan benih melon dalam negeri dan mengurangi ketergantungan impor benih melon dari luar negeri. Tujuan penelitian ini adalah untuk mengevaluasi penampilan fenotipik 24 genotip tanaman melon hibrida (F1).  Penelitian ini dilakukan di Kebun Percobaan Agroteknologi Fakultas Pertanian Universitas Trunojoyo Madura pada bulan Februari sampai Mei 2019. Bahan yang digunakan adalah 24 genotip melon hibrida (F1) hasil persilangan di antara galur-galur melon. Penelitian ini menggunakan Rancangan Acak Kelompok dengan satu perlakuan yaitu genotip dan diulang sebanyak 3 kali. Analisis data menggunakan analisis varians (Anova) yang dilanjutkan dengan uji Duncan pada taraf 5%. Nilai heritabilitas dalam arti luas dihitung menggunakan taksiran nilai kuadrat tengah pada analisis varians. Seleksi indeks digunakan untuk mendapatkan kandidat varietas tanaman melon hibrida. Hasil penelitian menunjukkan bahwa 24 tanaman melon hibrida (F1) yang diuji memiliki perbedaan penampilan pada karakter umur berbunga, panjang buah, diameter buah, tebal daging buah, kadar gula, jumlah biji per buah, bobot buah per tanaman dan produksi per hektar. Nilai heritabilitas dalam arti luas tanaman melon hibrida (F1) pada karakter yang dievaluasi berkisar antara 0,15 – 0,71. Hasil  nilai seleksi indeks terboboti menunjukkan bahwa terdapat dua calon varietas tanaman melon hibrida yang memiliki seleksi indeks tertinggi yaitu G4 dan G5.  ABSTRACTAssembling hybrid melon varieties with superior characters is an effort to meet the needs of domestic melon seeds and reduce dependence on imported melon seeds. The purpose of this study was to evaluate the phenotypic appearance of 24 genotypes of hybrid melon plants (F1).  This research was conducted at the Agrotechnology Experimental Field at Faculty of Agriculture, Universitas Trunojoyo Madura from February to May 2019. The materials used

scholarly journals Muskmelon seed priming in relation to seed vigor

2004 ◽  
Vol 61 (1) ◽  
pp. 114-117 ◽  
Author(s):  
Warley Marcos Nascimento ◽  
Fernando Antônio Souza de Aragão
Keyword(s):  
Low Temperature ◽  
Interaction Effect ◽  
Cucumis Melo ◽  
Seed Quality ◽  
Germination Rate ◽  
Seed Priming ◽  
Germination Percentage ◽  
Seed Vigor ◽  
Cucumis Melo L ◽  
Aged Seeds

A number of important factors may affect seed priming response, including seed quality. Effects of seed vigor on seed priming response were investigated using seed lots of two muskmelon (Cucumis melo L.) cultivars. Seeds of muskmelon, cvs. Mission and Top Net SR were artificially aged at 43°C for 0, 20 and 40 hours. Seeds were primed for six days in darkness at 25°C in KNO3 (0.35 mol L-1) aerated solution. Aged seeds germinated poorly at 17°C. Priming increased germination rate at 17 and 25°C and germination percentage at 17°C. An interaction effect on germination performance between vigor and priming was observed, especially at low temperature. Priming increased germination performance in seeds of low vigor, and the response was cultivar dependent.

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