Somatic Hybridization Between Tobacco (Nicotiana tabacum L.) and Black Nightshade (Solanum nigrum L.) and the Selection of a New Strain, 694-L

Author(s):  
Z. A. Xia ◽  
X. S. Wan ◽  
F. D. Wang ◽  
X. F. Ye ◽  
F. N. Liu ◽  
...  
Bragantia ◽  
1961 ◽  
Vol 20 (unico) ◽  
pp. 777-785
Author(s):  
Darcy M. Silva ◽  
Avelino R. de Oliveira ◽  
Elliot W. Kitajima ◽  
Ana Maria B. Carvalho ◽  
A. S. Costa

Experimentos relativos à purificação do vírus da necrose branca do fumo, em geral instável aos processos de purificação, mostraram ser possível obter preparações razoàvelmente homogêneas partindo-se de plantas por êle infetadas. O processo de purificação constou de uma clarificação preliminar através da adsorção de diversos componentes do suco de planta, ao qual foi adicionado dietilditiocarbamato de sódio a 0,1 M e tampão de fosfato pH 8,0 e a 0,1 M em fosfato hidradatado de cálcio, seguida de ultracentrifugações diferenciais. Os resultados das purificações a partir de Nicotiana tabacum L. var. xanthi, Solanum nigrum L. e Datura stramonium L. doentes, mostraram-se consistentes com respeito à presença de pellets após duas ultracentrifugações, o mesmo não acontecendo com as plantas contrôles. Tais preparações apresentaram infetuosidade até o terceiro dia após a extração do suco. Exames ao microscópio eletrônico das suspensões das pellets acima mencionadas em água destilada, mostraram a existência de partículas esferóides com um diâmetro ao redor de 50 milimicra. Injeções em coelho, via íntravenosa, num total de 7 doses de 2-3 ml de suspensão do vírus da necrose branca do fumo, preparadas diariamente pelo processo já referido, mas com uma só ultracentrifugação, provocaram a formação de anticorpos para o mesmo, conforme se pôde constatar pelos testes de precipitina de difusão em ágar.


2014 ◽  
Vol 1 (2) ◽  
pp. 20-23
Author(s):  
O. Ivashchenko ◽  
O. Ivashchenko

Aim. Studying of black nightshade young plants’ response to the induced mechanical stresses. Methods. Researches conducted in small plot fi eld experiments. Results. Change of sensitivity level of Solanum nigrum L. plants depending on phases of their development at the moment of damage of elevated parts has been proven. Owing to loss of the surface capable to photosynthesis, there is an essential decrease in volumes of photosynthesis at plants of weed survived and their possibilities of ontogeny passage. The deep induced dis- stresses reduce biological effi ciency of plants, their ability to accumulate weight and to form seeds and even lead them to death. Conclusions. The defi ned principles of response of weed plants to the induced mechanical dis-stresses are can be used for working out and ecological receptions of crops protection from weeds.


2018 ◽  
Vol 08 (03) ◽  
Author(s):  
Ademuyiwa Helen ◽  
Ologundudu Akinbode Foluso ◽  
Fasidi Olutayo

2001 ◽  
Vol 120 (3) ◽  
pp. 201-207 ◽  
Author(s):  
K. Horsman ◽  
T. Gavrilenko ◽  
M. Bergervoet ◽  
D.-J. Huigen ◽  
A. T. W. Joe ◽  
...  

2020 ◽  
Vol 14 (1) ◽  
pp. 192-203
Author(s):  
Thierry Placide Médard Kingo Kpangba ◽  
Joseph Mpika ◽  
Alaric Makoundou ◽  
Mercier Alain Bita ◽  
Attibayéba Attibayéba

La productivité de la morelle noire est faible sur les sols surexploités dans les zones périurbaines de Brazzaville. L’objectif était d’évaluer l’apport de la terre des termitières sur la croissance végétale de trois cultivars de la morelle noire. Les termitières collectées ont été broyées, tamisées et amendées les planches de 3 m x 1,2 m. Une planche ayant reçu 0 kg, 2 kg, 4 kg et 6 kg de terre des termitières, 60 plants d’un cultivar ont été repiqués aux écartements 20 x 20 cm selon un schéma bi factoriel complet 4 x 3 logé dans un dispositif en bloc complètement randomisé. Les traitements ont été répétés trois fois. Les résultats ont révélé une meilleure croissance en hauteur et en diamètre ainsi qu’un meilleur développement foliaire des plants amendés avec les doses de la terre des termitières en comparaison de ceux n’en ayant pas reçu. L’apport de 6 kg de terre des termitières montre une influence positive sur le développement racinaire de plants des trois cultivars. L’apport 2 kg, 4 kg et 6 kg de terre de termitières améliore la croissance végétative et le rendement en biomasses aérienne et souterraine de trois cultivars de morelle noire cultivés au Congo. © 2020 International Formulae Group. All rights reserved. Mots clés: Congo, fertilisation, termitières champignons, croissance végétative, Solanum nigrum L. English Title: Effect of the termite mounds on the vegetative production of three cultivars of black nightshade (Solanum nigrum L.: Solanaceae) grown in Brazzaville, Congo English Abstract The productivity of black nightshade is low on the overexploited soils in the suburban areas of Brazzaville. The objective was to evaluate the contribution of termite mound on the plant growth of three black nightshade cultivars. The termite mounds were collected, crushed, sieved and amended the planks of 3m x 1.2m. A board having received 0 kg, 2 kg, 4 kg and 6 kg of termite mounds, 60 plants of a cultivar were transplanted at 20 x 20 cm intervals according to a complete 4 x 3 bi-factorial diagram housed in a block plan completely randomized. The treatments were repeated three times. The results showed better growth in height and diameter, as well as better foliar development of seedlings amended with termite mounds compared to those that did not. The contribution of 6 kg of termite mound had a positive influence on the root development of the three cultivars. The contribution of 2 kg, 4 kg and 6 kg of termite mound improved vegetative growth and yield in aboveground and belowground biomass of three black nightshade cultivars grown in Congo. © 2020 International Formulae Group. All rights reserved. Keywords: Congo, cultivar, fertility, Termite fungi, vegetative production, Solanum nigrum L.


2019 ◽  
pp. 515-522
Author(s):  
M. Suganthy ◽  
K. Rajamani ◽  
L. Nalina ◽  
B. Meena

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