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Pàgina 1 des de 67 resultats
Nucleic acid and protein synthesis in discs cut from mature leaves of Nicotiana tabacum L. and cultured on nutrient agar with and without kinetin.
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The effect of kinetin on aspects of the metabolism of discs cut from mature leaves of Nicotiana tabacum and cultured in the light on agar containing mineral salts and sucrose was studied. In the first few days of culture there was a rapid decline in chlorophyll content. Discs treated with kinetin in
First report of Xanthomonas hortorum causing bacterial leaf spot of lavender ( Lavandula × intermedia) in Ohio
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In July 2018, a sample of lavender var. Grosso (Lavandula × intermedia 'Grosso') from Miami County, OH was received by The Ohio State University Vegetable Pathology Laboratory in Wooster. Lavender plants were field-grown in sandy clay soil with plastic mulch under drip irrigation.
First Report of Fusarium Wilt of Tobacco Caused by Fusarium kyushuense in China.
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Tobacco (Nicotiana tabacum L.) is a leafy, annual, solanaceous plant grown commercially for its leaves. China accounts for more than 39.6% of total global tobacco production (3). In May 2012, seedlings of tobacco cv. Honghuadajinyuan in a Guiyang tobacco commercial field (Guizhou, China, 26.35° N,
Identification and molecular characterization of twin-arginine translocation system (Tat) in Xanthomonas oryzae pv. oryzae strain PXO99.
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Xanthomonas oryzae pv. oryzae causes bacterial leaf blight, one of the most widespread and destructive bacterial diseases in rice. This study identified and characterized the contribution of the twin-arginine translocation (Tat) pathway to motility, chemotaxis, extracellular polysaccharide (EPS)
Wildfire of Soybean Caused by Pseudomonas syringae pv. tabaci, a New Disease in Korea.
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In 2006 and 2007, a new bacterial disease was observed in field-cultivated soybeans in Boeun District and Munkyung City of Korea. The disease caused severe blighting of soybean (Glycine max) leaves. Soybean leaves in fields showed yellowish spots with brown centers. Brown and dead areas of variable
Outbreak of Brown Spot of Tobacco Caused by Alternaria alternata in Connecticut and Massachusetts.
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In early August 2000, a leaf spot disease of broadleaf tobacco (Nicotiana tabacum L.) was widespread and severe in Connecticut and Massachusetts. The spots were roughly circular, with necrotic centers and concentric rings and often surrounded by a yellow halo. Spots ranged in size from small fleck
Yellow Stunt, a Tobacco Disease Caused by Pythium dissotocum, in Southern Parts of Brazil.
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Yellow stunt, an emerging disease of tobacco (Nicotiana tabacum), has become increasingly prevalent in tobacco-growing regions in southern Brazil. Major symptoms are moderate to severe stunting, yellowing of leaves, severe wilting, darkened roots, necrosis of stem tissue directly above the soil
First Report of Target Spot of Tobacco Caused by Rhizoctonia solani (AG-3) in Massachusetts.
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In June 2010, shade-grown cigar wrapper tobacco (Nicotiana tabacum L.) plants in Hampshire County, Massachusetts were observed with leaf lesion symptoms that ranged from small (2 to 3 mm) water-soaked spots to larger (2 to 3 cm) lesions. Lesions had a pattern of concentric rings, necrotic centers
First Report of Botrytis cinerea Causing Gray Mold of Tobacco in Guizhou Province of China.
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Tobacco (Nicotiana tabacum L.) is a leafy, annual, solanaceous plant grown commercially for its leaves. Guizhou Province produces more than 30% of the total Chinese tobacco crop. In July 2010, a disease was observed in a commercial field of 5-month-old N. tabacum plants in Bijie, Guizhou in
First Report of Blossom Blight of Strawberry (Fragaria × ananassa) Caused by Pseudomonas marginalis.
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In 2003, a new disease was observed on commercial strawberries (Fragaria × ananassa Duch.) grown in multiple fields in Watsonville, CA. Initial symptoms consisted of brown lesions on the undersides of the sepals of strawberry flowers. The lesions coalesced and spread to upper sepal surfaces and
First Report of Target Spot of Broadleaf Tobacco Caused by Rhizoctonia solani (AG-3) in Connecticut.
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In June 2011, 15 transplant beds of broadleaf cigar wrapper tobacco (Nicotiana tabacum L., cv. C9) plants in Hartford County, Connecticut, were observed with almost every plant diseased. Leaf lesion symptoms ranged from small (2 to 3 mm) water-soaked spots to larger (2 to 3 cm) lesions. Disease was
First Report of Cercospora nicotianae Causing Frog Eye Spot in Cigar Tobacco in Hainan, China
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Cigar tobacco (Nicotiana tabacum L.), sun air-cured tobacco, originally from South America, with a main use to rolling cigar wrapper that is different from flue-cured tobacco. In April, 2018, diseased leaves were observed in cigar tobacco in some fields in Danzhou city (109.58°E, 19.53°N) and
Nicotiana tabacum as an Experimental Host for the Study of Plant-Xylella fastidiosa Interactions.
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Xylella fastidiosa causes citrus variegated chlorosis (CVC). Information generated from the X. fastidiosa genome project is being used to study the underlying mechanisms responsible for pathogenicity. However, the lack of an experimental host other than citrus to study plant-X. fastidiosa
First report of tobacco bacterial hollow stalk caused by Dickeya chrysanthemi (syn. Erwinia chrysanthemi) in Nanping, China
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Tobacco, Nicotiana tabacum L., family Solanaceae, is grown for its leaves (mature period). It originated in the Mesoamericas but today is cultivated globally. China produces about one-third of the world´s supply of tobacco leaves and is the largest tobacco producer in the world (Hu et al. 2007). In
First Report of Bacterial Blight of Crucifers Caused by Pseudomonas cannabina pv. alisalensis in Minnesota on Arugula (Eruca vesicaria subsp. sativa).
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In 2011, bacterial blight of arugula (Eruca vesicaria subsp. sativa; cv. Roquette) was observed in organically grown plants under overhead irrigation in a field near Delano, MN. Approximately 80 to 100% of each planting was affected, with greater rates of infection occurring after periods of high
La base de dades d’herbes medicinals més completa avalada per la ciència
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* Tota la informació es basa en investigacions científiques publicades
