scholarly journals Quantitative Response of Cucumis melo Inoculated with Root Rot Pathogens

Plant Disease ◽  
2001 ◽  
Vol 85 (1) ◽  
pp. 65-70 ◽  
Author(s):  
M. Biernacki ◽  
B. D. Bruton
Keyword(s):  
Root Rot ◽  
Cucumis Melo ◽  
Plant Traits ◽  
Growth Traits ◽  
Fungal Species ◽  
Root Diameter ◽  
Plant Responses ◽  
Root Tips ◽  
Cucumis Melo L ◽  
Univariate Analyses

This experiment quantified the effects of three root rot pathogens on muskmelon (Cucumis melo L., var. cantalupensis) growth traits using computerized image analysis. Plants were grown from seed in sand infested with the soilborne pathogen Monosporascus cannonballus, Acremonium cucurbitacearum, or Rhizopycnis vagum. After 28 days in the growth chamber, images of plants were analyzed to quantify their response. Compared to noninoculated muskmelons, inoculated plants had significantly increased mean root diameter (45%), decreased root length (26%, primarily in roots of <0.5 mm diameter), decreased number of root tips (27%), decreased rhizosphere volume (40%), and decreased cumulative and mean surface area of leaves (24%). Effects of M. cannonballus on muskmelon growth were significantly different compared to A. cucurbitacearum and R. vagum. Isolate effects manifested a greater magnitude of difference on muskmelon traits than those observed at the species level. Multivariate analyses of plant responses were more powerful than univariate analyses to differentiate among effects of pathogen species and pathogen isolates. Discriminant analysis were useful to identify groups of plant traits modified by each fungal species or isolate at low disease levels. Digital image analyses proved to be a useful technique in quantitative assessment of plant damage caused by soilborne root rot pathogens.

scholarly journals ANALISIS FENOTIPE DAN PLOIDI TANAMAN MELON (Cucumis melo L.) HASIL PERLAKUAN EKSTRAK ETANOLIK DAUN TAPAK DARA (Catharanthus roseus [L] G. Don.)

Jurnal Biota ◽  
2018 ◽  
Vol 4 (2) ◽  
pp. 62-67
Author(s):  
Nugroho Nofriarno ◽  
Budi Setiadi Daryono ◽  
Avia Purnama Saputri ◽  
Estiyani Indraningsih
Keyword(s):  
Chromosome Number ◽  
Leaf Area ◽  
Catharanthus Roseus ◽  
Cucumis Melo ◽  
Second Generation ◽  
Stem Diameter ◽  
Root Tips ◽  
Horizontal Diameter ◽  
Phenotypic Character ◽  
Cucumis Melo L

Anti-mitotic agents such as colchicine have been used to induce polyploidy in various plants. On the other hand, vincristine and vinblastine are also antimitotic agent extracted from Periwincle (Catharanthus roseus [L] G. Don) were previously studied to produce autotetraploid on shallot tuber (Allium cepa L.). Therefore, in this study phenotype character and ploidy of muskmelon (Cucumis melo L.) produced by etanolic extract of periwikle leaves were determined. The effects of different concentration of etanolic extract of periwinkle leaves on polyploidy induction in muskmelon were examined. Melon seedling of two days old were immersed in 0.5%, 0.1%, and 0.05% for 8 hours. Then seedling was grown on the polybag and a drop of each concentration of periwinkle leaves’s etanolic extract was added into apical shoot.  Melon seedling of ten days old were moved and cultivated and harvested on 60 days after cultivation. Phenotypic character such as: plant high, stem diameter, leaf area, fruit weight, fruit area around, flesh fruit thickness, skin fruit thickness, fruit horizontal diameter, fruit, vertical diameter, number of seeds, weight of 100 gram of seed, seed leght, seed width, and seed thickness were examined. The ploidy degree was determined by count of chromosome number root tips of second generation muskmelon sprout. Result of this study revealed that 0.05% etanolic extract of periwinkle leaves for 8 hours immersed is optimum concentration to induce autotetraploid muskmelon (4n=48). Autotetraploid phenotypic character of muskmelon produced by 0.05% etanolic extract of periwinkle leaves were generally bigger than control plants statistically significant in stem diameter, leaf area, and fruit horizontal diameter. The result also showed that the chromosome number of second generation autotetraploid muskmelon sprout was tetraploid (4n=48).

scholarly journals Differential Fruit Load in Melon (Cucumis melo L.) Affects Shoot and Root Growth, and Vine Decline Symptoms

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 526B-526 ◽  
Author(s):  
David W. Wolff ◽  
Daniel I. Leskovar ◽  
Mark C. Black ◽  
Marvin E. Miller
Keyword(s):  
Root Rot ◽  
Cucumis Melo ◽  
Growth Parameters ◽  
Symptom Expression ◽  
Germplasm Screening ◽  
Fruit Maturity ◽  
Vine Decline ◽  
Cucumis Melo L ◽  
Root Size ◽  
Fruit Load

The effect of zero, one, and two fruits per vine on plant growth and reaction to Monosporascus root rot/vine decline were investigated. In the first study, four cultivars with differing levels of tolerance were evaluated (`Primo', `Deltex', `Caravelle', `Magnum 45'). Vine decline ratings were taken weekly during the harvest period for 4 weeks. Treatments with no fruit showed delayed and less-severe vine decline symptoms. Temperature also effected vine decline symptom expression. In a Fall test, with lower temperatures during fruit maturity, symptoms were delayed in all treatments and often absent in treatments with no fruit load. Vine decline symptom expression is greatly effected by physiological (fruit load) and temperature stress. A subsequent study was conducted to more precisely quantify the effect of various fruit loads on shoot/root partitioning and vine decline symptoms. In addition to growth parameters root disease ratings were taken. `Caravelle', the most-susceptible genotype, was grown under differing fruit loads as mentioned above in Weslaco and Uvalde, Texas. As fruit load increased, root size decreased. Increased vine decline symptoms were observed under higher fruit loads. The implications on germplasm screening and breeding for resistance will be discussed.

scholarly journals First Report of Myrothecium verrucaria from Muskmelon Seeds

Plant Disease ◽  
1999 ◽  
Vol 83 (6) ◽  
pp. 589-589 ◽  
Author(s):  
A. Belisario ◽  
E. Forti ◽  
L. Corazza ◽  
H. A. van Kesteren
Keyword(s):  
Root Rot ◽  
Cucumis Melo ◽  
Potato Dextrose Agar ◽  
Main Root ◽  
Differential Host ◽  
First Report ◽  
Myrothecium Verrucaria ◽  
Petri Dishes ◽  
Melon Seeds ◽  
Cucumis Melo L

Myrothecium verrucaria (Albertini & Schwein.) Ditmar:Fr. was isolated from muskmelon (Cucumis melo L.) seeds of Charentais-T, a culti var used as a differential host with no resistance to Fusarium oxysporum f. sp. melonis races. A white floccose mycelial mat developed on melon seeds during incubation on moist blotters. Mycelia were mass transferred from melon seeds onto potato dextrose agar (PDA) medium. At 25°C in the dark, a mycelial mat with characteristic annelations of greenish-black sporodochia, without setae, was produced. Conidia (2 to 3 × 6 to 10 μm) were lemon shaped, with a typical conical mucous appendage at one end, which was visible with Loeffer's flagella stain (1). Based on these characteristics, the fungus was identified as M. verrucaria. For pathogenicity studies, surface sterilized seeds of C. melo cv. Charentais-T were coated with M. verrucaria conidia by gently rubbing the seeds on sporodochia produced on 15-day-old cultures on PDA. Once coated, seeds were plated onto water agar and on sterile moist blotters in 9-cm-diameter petri dishes. Plates were incubated at 28°C in the dark. Five seeds per plate and three plates per experiment were used. Experiments were replicated three times. Control seeds were plated without coating. After 7 days, on water agar, 90% of melon seeds failed to germinate while the remaining 10% produced young seedlings that died from root rot and necrotic lesions on the hypocotyl. After 12 days on moist blotters, 100% of the melon seedlings died, showing necrotic lesions on the hypocotyl and on the main root. The pathogen was reisolated from symptomatic melon seedlings. All control seeds germinated and grew into healthy seedlings. M. verrucaria, known to be a seed-borne pathogen, has been isolated from soil and plants worldwide (2). This is the first report of M. verrucaria pathogen on muskmelon. This fungus is not a serious concern when seeds are dressed with fungicides. References: (1) K. V. A. Thompson and S. C. Simmens. Nature. 193:196, 1962. (2) S.-M. Yang and S. C. Jong. Plant Dis. 79:994, 1995.

Modelo productivo del cultivo de melón (Cucumis melo L.) para la región Caribe

2017 ◽  
Author(s):  
César Elías Baquero Maestre ◽  
Ángela Arcila Cardona ◽  
Heriberto Arias Bonilla ◽  
Marlon Yacomelo Hernández
Keyword(s):  
Cucumis Melo ◽  
Cucumis Melo L

ChemInform Abstract: Impact of Potassium Nutrition on Postharvest Fruit Quality: Melon (Cucumis Melo L) Case Study

ChemInform ◽  
2011 ◽  
Vol 42 (8) ◽  
pp. no-no
Author(s):  
Gene E. Lester ◽  
John L. Jifon ◽  
Donald J. Makus
Keyword(s):  
Fruit Quality ◽  
Cucumis Melo ◽  
Potassium Nutrition ◽  
Cucumis Melo L

scholarly journals High-Throughput Phenotyping Methods for Breeding Drought-Tolerant Crops

2021 ◽  
Vol 22 (15) ◽  
pp. 8266
Author(s):  
Minsu Kim ◽  
Chaewon Lee ◽  
Subin Hong ◽  
Song Lim Kim ◽  
Jeong-Ho Baek ◽  
...  
Keyword(s):  
Drought Stress ◽  
High Throughput ◽  
Large Scale ◽  
Crop Yields ◽  
Plant Traits ◽  
Rapid Development ◽  
Plant Responses ◽  
Phenotypic Data ◽  
Agricultural Technologies ◽  
High Throughput Phenotyping

Drought is a main factor limiting crop yields. Modern agricultural technologies such as irrigation systems, ground mulching, and rainwater storage can prevent drought, but these are only temporary solutions. Understanding the physiological, biochemical, and molecular reactions of plants to drought stress is therefore urgent. The recent rapid development of genomics tools has led to an increasing interest in phenomics, i.e., the study of phenotypic plant traits. Among phenomic strategies, high-throughput phenotyping (HTP) is attracting increasing attention as a way to address the bottlenecks of genomic and phenomic studies. HTP provides researchers a non-destructive and non-invasive method yet accurate in analyzing large-scale phenotypic data. This review describes plant responses to drought stress and introduces HTP methods that can detect changes in plant phenotypes in response to drought.

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