Transfer of resistance to Verticillium dahliae Kleb. from Solanum torvum S.W. into potato (Solanum tuberosum L.) by protoplast electrofusion

Euphytica ◽  
1992 ◽  
Vol 64 (1-2) ◽  
pp. 39-47 ◽  
Author(s):  
R. Jadari ◽  
D. Sihachakr ◽  
L. Rossignol ◽  
G. Ducreux
Keyword(s):  
Solanum Tuberosum ◽  
Verticillium Dahliae ◽  
Solanum Tuberosum L ◽  
Solanum Torvum ◽  
Protoplast Electrofusion ◽  
Verticillium Dahliae Kleb

Histopathology of Verticillium dahliae within mature roots of Russet Burbank potatoes

1983 ◽  
Vol 61 (12) ◽  
pp. 3405-3421 ◽  
Author(s):  
James W. Perry ◽  
Ray. F. Evert
Keyword(s):  
Verticillium Dahliae ◽  
Solanum Tuberosum L ◽  
Hydrolytic Enzymes ◽  
Structural Response ◽  
Cortical Layer ◽  
Russet Burbank ◽  
Vessel Elements ◽  
Dense Substance ◽  
Perforation Plates ◽  
Verticillium Dahliae Kleb

Roots of Russet Burbank potatoes (Solanum tuberosum L.) inoculated with Verticillium dahliae Kleb. were examined, primarily with the electron microscope. Penetration hyphae entered epidermal cells directly, apparently aided by hydrolytic enzymes. In most instances, penetration took place without eliciting any structural response. Most hyphae failed to penetrate deeper than the epidermal layer, owing primarily to the formation by exodermal cells of lignitubers that ensheathed the penetration hyphae. Apparently lignitubers were sometimes initiated as callose-like appositions opposite encounter sites. All cortical layers were capable of lignituber production. Few hyphae were encountered within cells deeper than the second cortical layer, and intercellular colonization was not extensive. Nonetheless, vascular infection of unwounded roots occurred. Wilt symptoms were first noted 2 days after hyphae were found in vessel elements of the root. Walls and pit membranes of colonized tracheary elements were coated with an electron-dense substance. As the disease progressed, hyphae invaded all tissues in the vascular cylinder and eventually grew back out into the cortex. The soft-walled tissues were destroyed. In wounded roots many severed vessels contained membranous remnants, conidia, and hyphae that tended to be accumulated at the perforation plates.

PATHOGENIC SPECIES OF VERTICILLIUM IN HORTICULTURAL CROPS AND WEEDS IN SOUTHWESTERN ONTARIO

1973 ◽  
Vol 53 (3) ◽  
pp. 615-622 ◽  
Author(s):  
C. D. McKEEN ◽  
H. J. THORPE
Keyword(s):  
Solanum Tuberosum ◽  
Verticillium Wilt ◽  
Verticillium Dahliae ◽  
Solanum Tuberosum L ◽  
Potato Crop ◽  
Pathogenic Species ◽  
Essex County ◽  
Horticultural Crops ◽  
Species Being ◽  
Important Disease

Verticillium wilt is an important disease of many horticultural crops in Essex County of southwestern Ontario. Verticillium dahliae is the predominant pathogenic species, being isolated from all susceptible crops and also from a few common weeds. V. albo-atrum, a virulent pathogen, and V. nigrescens, a weak pathogen, are isolated almost exclusively from potato (Solanum tuberosum L.). V. albo-atrum is virtually dependent on the potato crop for its existence in Essex County. The importance of weeds in the perpetuation of V. dahliae in cropped areas is emphasized.

The effect of colonization by Verticillium dahliae on the root tips of Russet Burbank potatoes

1983 ◽  
Vol 61 (12) ◽  
pp. 3422-3429 ◽  
Author(s):  
James W. Perry ◽  
Ray F. Evert
Keyword(s):  
Verticillium Dahliae ◽  
Apical Meristem ◽  
Solanum Tuberosum L ◽  
Root Cap ◽  
Root Tips ◽  
Vascular Differentiation ◽  
Infected Root ◽  
Cell Layers ◽  
Wall Appositions ◽  
Verticillium Dahliae Kleb

The structure and development of tissues in potato (Solanum tuberosum L.) root tips colonized by Verticillium dahliae Kleb. were contrasted with those of uninoculated root tips. Within 2 days of inoculation hyphae had penetrated the root cap without eliciting any wall appositions in the root cap cells. Callose-like deposits were found along the walls of protodermal cells bordering the colonized cap cells. Overall, colonized root tips had lost their meristematic appearance owing to increased vacuolation in the cells. In contrast to the normal longitudinal course of primary vascular differentiation, in infected root tips the protoxylem matured in advance of the protophloem. Fifteen days after inoculation the root tips had lapsed into maturity. The endodermis and exodermis extended completely around what was once the apical meristem. Although the xylem had differentiated to within several cell layers of the colonized apex, xylem infection had not occurred in this region. Sieve elements in colonized root tips failed to develop sieve-plate pores.

Situación económica y social de la población de San José del Carmen, San Cristóbal de las Casas, Chiapas

2019 ◽  
Vol 12 (4) ◽  
Author(s):  
Pedro Cadena-Iñiguez ◽  
Eileen Salinas-Cruz ◽  
Jesús Martínez-Sánchez ◽  
Mariano Morales-Guerra ◽  
Romualdo Vásquez-Ortiz ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Theobroma Cacao ◽  
Zea Mays L ◽  
Solanum Tuberosum L ◽  
San Jose ◽  
Phaseolus Vulgaris L ◽  
Las Casas ◽  
Vicia Faba L ◽  
Las Mujeres ◽  
Theobroma Cacao L

Objetivo: Establecer una línea base como fundamento para la intervención e inducción de innovaciones a través de escuelas de campo y planes de negocios. Diseño/metodología/aproximación: El estudio se desarrolló en San José del Carmen, San Cristóbal de Las Casas, Chiapas, México. Se elaboró una encuesta como instrumento para recabar en campo información de familias de la localidad con la finalidad de conocer su situación actual. La localidad de trabajo se eligió utilizando como criterio las poblaciones que se encuentran dentro de Cruzada Nacional contra el hambre y en la clasificación de la pobreza extrema Resultados: La localidad de San José del Carmen es considerada como de alta marginación, la población es bilingüe, su principal lengua es el Tzotzil, el nivel de estudios promedio es hasta el tercer año de primaria, las principales actividades productivas son la siembra de maíz (Zea mays L.), frijol (Phaseolus vulgaris L.), papa (Solanum tuberosum L.) y haba (Vicia faba L.) que son utilizadas principalmente para autoconsumo.  No cuentan con agua potable ya que su sistema es a través de la recaudación de agua de lluvia o a través de un jagüey. Sus principales actividades económicas son la albañilería por parte de los hombres, y venta de productos, tales como el pozol (bebida energética a base de maíz y cacao (Theobroma cacao L.), tostadas y algunos vegetales por parte de las mujeres. Las tostadas son producidas en forma artesanal con un proceso de doble nixtamalización y vendida en bolsas de 20 tostadas cada una, a un costo de MX$10.00 en los mercados de San Cristóbal de las Casas, una a dos veces por semana alrededor de 40 bolsas por día de venta. Limitaciones del estudio/implicaciones: La afiliación zapatista de alguno de los pobladores y el hecho de que algunos habitantes no hablen español, fueron factores que limitaron desarrollar al 100% el estudio; sin embargo, se considera que se tienen los elementos necesarios para establecer la línea base de la situación de San José del Carmen. Conclusiones: El diagnóstico servirá como una herramienta para establecer una intervención a través de innovaciones y planes de negocios en la comunidad de estudio. Los pobladores cuentan con herramientas necesarias para obtener nuevos conocimientos que ayuden a un desarrollo de su producción. El idioma no deberá de ser una limitante para ello.

ALLELE DIVERSITY FOR ACID VACUOLAR INVERTASE GENE Pain-1 FRAGMENT IN POTATO (Solanum tuberosum L.) VARIETIES AND LINES

2018 ◽  
Vol 53 (1) ◽  
pp. 132-139
Author(s):  
M.A. Slugina ◽  
◽  
E.O. Shmelkova ◽  
A.A. Meleshin ◽  
E.Z. Kochieva ◽  
...  
Keyword(s):  
Solanum Tuberosum ◽  
Solanum Tuberosum L ◽  
Vacuolar Invertase ◽  
Invertase Gene
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