Drought tolerance in potatoes

Steckel, Joyce R. A.; Gray, D.

doi:10.1017/s0021859600062900

Cited by 56 publications

(35 citation statements)

References 7 publications

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“…There are differences in potato cultivar susceptibility to drought (Steckel and Gray 1979;Levy 1983Levy , 1986Susnoschi and Shimshi 1985). Screening for drought susceptibility is complicated.…”

Section: Discussionmentioning

confidence: 99%

In vitro screening of potato lines for drought tolerance

Al-Biski

Najla

Sanoubar

et al. 2012

Physiol Mol Biol Plants

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Fresh water resources are limited and their use in agricultural production is expected to come under increasing constraints. Eighteen Syrian lines of potato (Solanum tuberosum L.) were screened for drought tolerance by measuring aerial and root growth in vitro. Drought stress was evaluated by adding 2, 4, 6, 8 and 10 % (w:v) of sorbitol to MurashigeSkoog medium and compared to 0 % for the control. Water potential of media ranged from −0.58 MPa to −2.5 MPa. Water-stress in culture adversely affected plant growth, and genotypes differed for their responses. Plant length and stem thickness, leaf area, root number length and thickness, and plant fresh and dry weights and plant water content were measured and all decreased due to drought. Grouping lines by cluster analysis for response to drought resulted in: (1) a tolerant group of six lines, (2) a moderately tolerant group of seven lines, and (3) a susceptible group of five lines. The variation in germplasm indicated that potato varieties can be developed for production under some levels of drought.

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Section: Discussionmentioning

confidence: 99%

In vitro screening of potato lines for drought tolerance

Al-Biski

Najla

Sanoubar

et al. 2012

Physiol Mol Biol Plants

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“…First, it currently assumes that the growth of the potato is not limited by its .water balance. In many cases, however, this assumption is violated (Gandar and Tanner, 1976;Steckel and Gray, 1979;Asfary et al, 1983). Two mechanisms operate here: photosynthesis is closely related to transpiration Allen and Scott, 1980); and water uptake determines the allocation of dry matter to the various parts of the plant (Brouwer, 1962;El Nadi et al, 1969;Davidson, 1969a,b;.…”

Section: Discussionmentioning

confidence: 99%

Construction and preliminary evaluation of a simulation model of the population dynamics of the potato cystnematode Globodera pallida

Ward

Rabbinge

Ouden³

1985

Netherlands Journal of Plant Pathology

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A model is constructed to simulate the popuiation dynamics of the potato cyst-nematode, Globodera pal/ida, and its effect on the growth of the potato. Parameters and rate variables are estimated from published data, and a preliminary evaluation is performed. Despite its simplicity, the model can provide realistic predictions of the real system's behaviour: the predicted relation between initial nematode density and the annual multiplication rate, and the effect of nematode density on tuber yield, are simulated well; the effects of early harvesting are similar to those described in the literature; and the predicted seasonal changes in population structure are in reasonable agreement with field observations. The \Veaknesses and potentials of the model, and of the dynamic simulation approach, are discussed.

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“…Part of the difficulty in identifying specific factors associated with drought susceptibility is related to the fact that timing and severity of drought is often difficult to impose and maintain under field conditions. Steckel and Gray (1979) examined rooting depth and soil water extraction of potato cultivars differing in drought susceptibility and found that these parameters could not be consistently related to yield responses under varying soil moisture conditions. Stark et al (1991) evaluated the canopy temperatures of 14 potato genotypes under water-stressed and well-watered conditions and found that the most drought tolerant genotypes had the warmest canopy temperatures under well-watered conditions, indicating reduced transpiration rates.…”

Section: Introductionmentioning

confidence: 99%

Potato Cultivar Response to Seasonal Drought Patterns

et al. 2013

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The ability to minimize potato yield and quality losses due to drought can be greatly improved by understanding the relative responses of different cultivars to seasonal variations in water supply. To address this need, we initiated a 2 year field experiment to determine the responses of the six potato cultivars to different seasonal drought patterns, including 1) full season irrigation at 100 % ET, 2) irrigation at 100 % ET terminated during late bulking , 3) full season irrigation at 70 % ET , 4) irrigation at 70 % ET terminated during late bulking , and 5) a gradual reduction in irrigation from 100 % ET during tuber initiation through early bulking, to 70 % ET during mid-bulking, and 50 % ET through late bulking. GemStar Russet and Ranger Russet, two medium-late maturing cultivars, generally produced the highest yields across the range of drought treatments, but both were fairly sensitive to changes in drought severity. Alturas, a late maturing cultivar, produced relatively high yields with full irrigation, but exhibited the greatest sensitivity to increasing drought severity, particularly when severe late-season water deficits were imposed. Yields for the early maturing cultivar Russet Norkotah were relatively low overall, but it was the least sensitive to changes in drought severity, particularly when late season drought was imposed. Russet Burbank produced comparatively high total yields across the range of drought treatments, but U.S. No. 1 yields were substantially reduced by each seasonal drought pattern. However, it was less sensitive to changes in drought severity than GemStar Russet, Ranger Russet and Alturas. Total and U.S. No. 1 yields for Summit Russet were low for each drought treatment and it exhibited intermediate sensitivity to changes in drought severity. GemStar Russet had the highest water use efficiency based on U.S. No. 1 yield.Resumen Se puede mejorar grandemente la habilidad para minimizar las pérdidas en rendimiento y calidad de papas debido a la sequía, mediante el entendimiento de las respuestas relativas de diferentes variedades a variaciones estacionales en el suministro de agua. Para atender esta necesidad, iniciamos un experimento de campo por dos años para determinar las respuestas de seis variedades de papa a diferentes patrones de sequía estacional, incluyendo, 1) riego completo en el ciclo al 100 % ET, 2) riego al 100 % ET terminando durante el fin de la tuberización, 3) riego durante todo el ciclo a 70 % ET, 4) riego al 70 % ET terminando al final de la tuberización, y 5) reducción gradual de riego de 100 % ET durante la iniciación de la tuberización a lo largo del llenado temprano, a 70 % ET durante la mitad del llenado, y 50 % ET a lo largo de la tuberización tardía. Gem Star Russet y Ranger Russet, dos variedades de intermedias a tardías, generalmente produjeron los rendimientos más altos a lo largo de la amplitud de los tratamientos de sequía, pero ambas fueron muy sensibles a los cambios de la severidad de la sequía. Alturas, una variedad tardía, produjo rendim...

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Drought tolerance in potatoes

Cited by 56 publications

References 7 publications

In vitro screening of potato lines for drought tolerance

In vitro screening of potato lines for drought tolerance

Construction and preliminary evaluation of a simulation model of the population dynamics of the potato cystnematode Globodera pallida

Potato Cultivar Response to Seasonal Drought Patterns

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