Effect of Ethylene on Tuber Initiation in Solanum tuberosum L.

Plants grown in the greenhouse from excised magnetically treated eyes of the Netted Gem potato, Solanum tuberosum L., yielded a greater weight and a greater number of tubers than those grown from untreated eyes. Pregermination magnetic treatment of the eyes sometimes produced an increase in top growth of plants. Plants grown in the field from excised magnetically treated eyes yielded 14% more marketable tubers that weighed 38.5% more than those grown from untreated eyes. Pregermination magnetic treatment of the eye may have effected a change in the metabolic process in the bud that eventually promoted earlier and greater tuber initiation.

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Effect of water deficit on some physiological and biochemical responses of the yellow diploid potato (Solanum tuberosum L. Group Phureja)

Agronomía Colombiana ◽

10.15446/agron.colomb.v38n1.78982 ◽

2020 ◽

Vol 38 (1) ◽

pp. 36-44

Author(s):

Wilmar Ariza ◽

Luis Ernesto Rodríguez ◽

Darwin Moreno-Echeverry ◽

Carlos Arturo Guerrero ◽

Liz Patricia Moreno

Keyword(s):

Solanum Tuberosum ◽

Stomatal Conductance ◽

Water Deficit ◽

Solanum Tuberosum L ◽

Tuber Initiation ◽

Diploid Potato ◽

Biochemical Responses ◽

Shoot Ratio ◽

Root Shoot Ratio ◽

Physiological And Biochemical

Water availability is one of the main limitations of potato yields due to the high sensitivity of this crop to water deficit. The objective of this study was to determine the effect of water deficit on some physiological and biochemical responses in yellow diploid potato plants (Solanum tuberosum L. Group Phureja) of the cultivars Criolla Colombia, Criolla Dorada and Criolla Ocarina. Plants at tuber initiation were subjected to two treatments: continuous irrigation and water deficit imposed by withholding water at tuber initiation for 17 d. The results showed that plants under water deficit increased chlorophyll concentration, malondialdehyde and proline content. However, these plants showed a decrease in stomatal conductance, leafarea, total dry mass and exhibited a higher root/shoot ratio in all potato cultivars. In addition, all the cultivars also showed a decrease in yield, which was associated with sensitivity to water stress. Although the high content of proline and high root/shoot ratio may be associated with tolerance to water deficit, this association was not observed in these cultivars, probably due to the high reduction of stomatal conductance, which limited the production of photoassimilates, plant growth, and,therefore, the yield.

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EFFECTS OF CULTURE DENSITY ON GROWTH AND IN VITRO TUBERIZATION CAPACITY OF POTATO PLANTLETS

Acta Agronomica Hungarica ◽

10.1556/aagr.48.2000.2.9 ◽

2000 ◽

Vol 48 (2) ◽

pp. 185-189

Author(s):

K. Tábori ◽

A. Ferenczy ◽

J. Dobránszki

Keyword(s):

Solanum Tuberosum ◽

Plant Density ◽

Solanum Tuberosum L ◽

Stem Length ◽

Tuber Initiation ◽

In Vitro Tuberization ◽

In Vitro Plantlets ◽

Plant Densities ◽

Potato Plantlets

In vitro plantlets of four varieties of potato (Solanum tuberosum L.) were grown at different plant densities to study their effects on growth and microtuber yield. The responses of the cultivars to plant density, as expressed by changes in development characteristics, especially stem length and leaf area, were different. The time of tuber initiation was earlier at higher plantlet densities for all cultivars. The microtuber number per plantlet was not affected by the plantlet density. The highest number of well-sized (≯4 mm) microtubers per jar could be harvested from the higher plantlet densities (30–40 plantlets per jar). In addition to good yield, the microtubers were uniform in these treatments, so they appear to be economical.

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Potato varieties (Solanum tuberosum L.) determined the drought tolerance using the plastic cover

Mongolian Journal of Agricultural Sciences ◽

10.5564/mjas.v32i1.1608 ◽

2021 ◽

Vol 32 (1) ◽

pp. 77-81

Author(s):

Enkhbold Bataa ◽

Ninjmaa Orgodol

Keyword(s):

Solanum Tuberosum ◽

Field Experiments ◽

Negative Impact ◽

Solanum Tuberosum L ◽

Total Yield ◽

Research Field ◽

Agricultural Science ◽

Tuber Initiation ◽

Potato Varieties ◽

Drought Tolerant

Selecting potato varieties which is drought-tolerant is one important way to reduce the risk of drought. Field experiments were conducted at potato research field located in the Institute of plant and agricultural science, Mongolia. In this experiment used the Gala, Soloist and Quarta varieties. total of 120 plants which is 40 bulbs from one variety were evaluated the drought tolerant. When we used the plastic cover from the tuber initiation to the bulking stage. The total harvest of potato decreased by 9.2 t/ha on average. The total harvest of potato decreased by 9.2 t/ha on average. When using the plastic cover, Potato harvest is decreased by 3.4 t/ha and tubers of production is decreased by 3.5 t/ha. The weight of non-standard tubers is closely related to the yield of varieties grown in drought conditions (r = 0.89), which accounts for the majority of the total yield by the weight of non-standard tubers. The Production tubers of Gala varieties is more 46.4 percent than the average varieties of potato. Lack of soil moisture decreases at the above stage of potato cultivation reduces the yield by 20-30%, reduces the growth rate, reduces the size and weight of the tubers, and has a significant negative impact on crop growth. Гандаавч ашиглан төмс (Solanum tuberosum)-ний сортуудын ган тэсвэрийг тодорхойлсон дүн Ганд тэсвэртэй сортыг шалгаруулж тарих нь гангийн эрсдэлийг багасгах нэг арга гэж эрдэмтэд үзсээр байна. Туршлага судалгааг УГТХүрээлэнгийн Төмс судлалын туршлагын талбайд Гала, Солист, Куарта сортыг хамруулж нэг сортоос 40 булцуу нийт 120 ургамалд ган тэсвэрийг үнэлэв. Төмсний таримлын хөгжлийн үе шат болох бундуйлалтаас бүрэн цэцэглэлтийн үе шатанд нь талбайн нөхцөлд гандаавч ашиглахад таримлын нийт ургац дунджаар 9.2 т/га буюу гандаавч ашиглаагүй талбайн ургацаас 3.4 т/га, таваарын булцууны ургац 3.5 т/га тус тус буурсан байна. Гандаавчтай нөхцөлд ургасан сортуудын ургацад стандарт бус булцууны жин нягт (r=0.89) хамааралтай байгаа нь нийт ургацын дийлэнх хувийг стандарт бус булцууны жин эзэлж байна. Гала сорт нь таваарын булцууны ургацаар сортуудын дунджаас 46.4 хувиар илүү байв. Төмсний таримлын дээрх үе шатанд хөрсний чийгийн хангамж дутагдалтай байвал ургац 20-30% буурч, ургах эрчим багасч улмаар булцууны хэмжээ жижгэрч, жин буурч таримлын өсөлт хөгжилтөнд ихээхэн сөрөг нөлөө үзүүлдэг байна. Түлхүүр үг: Гала, Солист, Куарта, булцуу, ургац

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Effects of nitrogen fertiliser on potato (Solanum tuberosum L., cv. Russet Burbank) in Tasmania. 2. Petiole and soil analysis

Australian Journal of Experimental Agriculture ◽

10.1071/ea02100 ◽

2003 ◽

Vol 43 (6) ◽

pp. 643 ◽

Cited By ~ 3

Author(s):

L. A. Sparrow ◽

K. S. R. Chapman

Keyword(s):

Solanum Tuberosum ◽

Soil Nitrogen ◽

Nitrate Nitrogen ◽

Soil Analysis ◽

Solanum Tuberosum L ◽

Russet Burbank ◽

Tuber Initiation ◽

Nitrogen Status ◽

Nitrogen Fertiliser ◽

Nitrate Concentrations

Thirteen field trials were conducted on ferrosols and tenosols in Tasmania to assess the response of potatoes (Solanum tuberosum L., cv. Russet Burbank) to basal and topdressed nitrogen fertiliser. The objectives of this study were to assess whether petiole nitrate concentrations could be used to indicate potato nitrogen status and crop response to nitrogen topdressing, and whether various soil nitrogen measures could be used to determine the responsiveness of potatoes to nitrogen fertilisation. Petiole nitrate-nitrogen concentrations in the youngest fully expanded leaves were found to be an indicator of nitrogen status. Critical nitrate concentrations varied in a linear fashion from about 25 000 mg/kg at tuber initiation to less than 5000 mg/kg when tubers were 100 mm long (about 100 days after planting). These concentrations are consistent with those determined for Russet Burbank in other studies. In contrast to petiole measures, various pre-plant and early season soil nitrogen measures (mineral, mineralisable and total nitrogen) did not adequately (adjusted R2<0.25) explain variation in crop nitrogen responsiveness and could not be recommended as diagnostic or predictive tests. Soil nitrogen mineralisation rates in spring varied from 0.4 to 5 kg N/ha.day and were higher at sites previously in pasture than at continuously cropped sites. Although petiole nitrate concentrations responded to nitrogen topdressing, most nitrogen-deficient crops in this study did not show yield responses to topdressed nitrogen. This limited the usefulness of petiole nitrate-nitrogen tests.

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

RECUBRIMIENTO COMESTIBLE CON BASE DE PIÑON MEXICANO (Jatropha curcas) SOBRE LA CALIDAD DE CHAYOTE MINIMAMENTE PROCESADO ◽

10.32854/agrop.v0i0.1371 ◽

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.

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