The effect of early drought stress on numbers of tubers and stolons of potato in controlled and field conditions

Haverkort, A. J.; Waart, M. van de; Bodlaender, K. B. A.

doi:10.1007/bf02358133

Cited by 74 publications

(37 citation statements)

References 18 publications

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“…With unchanged or increased HI, this is well expected and explained. The relationship with a higher tuber number is also expected as in these rain-fed conditions higher yields are associated with more rain and favourable soil water conditions during stolon and tuber formation, leading to higher stolon and tuber numbers, as was demonstrated by Haverkort et al (1990) in controlled and field conditions. The similarity of the data for BP1 and for all cultivars together (bold) in Table 4 shows that these correlation values also hold for each individual cultivar.…”

Section: −1mentioning

confidence: 70%

Potato Crop Response to Genotype and Environment in a Subtropical Highland Agro-ecology

2013

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Potato response to environment, planting date and genotype was studied for different agro-ecological zones in Lesotho. Field experiments were conducted at four different sites with altitudes ranging from 1,655 to 2,250 m above sea level during the 2010/2011 and 2011/2012 summer growing seasons. Treatments consisted of three cultivars that varied in maturity type, two planting dates and four sites differing in altitude and weather patterns. Various plant parts were measured periodically. To understand and quantify the influence of abiotic factors that determine and limit yields, the LINTUL crop growth model was employed which simulated potential yields for the different agro-ecological zones using weather data collected per site during the study period. Observed actual crop yields were compared with model simulations to determine the yield gap. Model simulations helped to improve our understanding of yield limitations to further expand potato production in subtropical highlands, with emphasis on increasing production through increased yields rather than increased area. Substantial variation in yield between planting date, cultivar and site were observed. Average tuber dry matter (DM) yields for the highest yielding season were above 7.5 t DM ha −1 or over 37.5 t ha −1 fresh tuber yield. The lowest yield obtained was 2.39 t DM ha −1 or 12 t ha −1 fresh tuber yield for cultivar Vanderplank in the 2011/2012 growing season at the site with the lowest altitude. Modelled potential tuber yields were 9-14 t DM ha −1 or 45-70 t ha −1 fresh yield. Drought stress frequently resulted in lower radiation use efficiencies and to a lesser degree harvest indices, which reduced tuber yield. The site with the lowest altitude and highest temperatures had the lowest yields, while the site with the highest altitude had the highest yields. Later maturing cultivars yielded more than earlier maturing ones at all sites. It is concluded that the risk of low yields in rain-fed subtropical

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Section: −1mentioning

confidence: 70%

Potato Crop Response to Genotype and Environment in a Subtropical Highland Agro-ecology

2013

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“…This study shows that water stress increased WUE. Haverkort et al (1990) also showed that drought increased WUE. Bodlaender (1986) showed that there was no relation between water usage and produced dry matter but that WUE had a significant negative relation with drought resistance.…”

Section: Resultsmentioning

confidence: 90%

Evaluation of Potato Cultivars for Resistance Against Water Deficit Stress Under In Vivo Conditions

Hassanpanah¹

2010

Potato Res.

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Water deficit is the most important abiotic stress factor in crop production. Evaluation of the response of different potato cultivars to water deficit stress is necessary to release cultivars for regions with water deficit. A split-plot experiment with three replications was carried out during 2005 and 2006. The main factor consisted of three levels of irrigation (irrigation after 25%, 35% and 50% discharge of the available water, i.e. normal conditions, mild stress and severe stress, respectively), and the split factor included seven potato cultivars (Agria, Savalan, Satina, Caesar, Kennebec, Marfona and Santé). Cultivars Savalan, Caesar and Kennebec had higher total and marketable tuber yield, water use efficiency, and values for stress tolerance indices than the other cultivars, both under mild and severe stress conditions. Cultivars Caesar and Kennebec were selected as tolerant cultivars; cultivars Savalan and Satina were identified as moderately tolerant cultivars whereas cultivars Agria, Marfona and Santé proved to be susceptible to water deficit.

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“…The mainstem number appears to be a varietal character, as reported by Lynch and Taî [22]. But it is also affected by other factors such as the length of presprouting period [2], size of seed tuber [14,37] and physiological age [15].…”

Section: Discussionmentioning

confidence: 99%

The effect of drought and cultivar on growth parameters, yield and yield components of potato

2003

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-Four potato cultivars (Solanum tuberosum L.) differing in their precocity and contrasted for their drought tolerance were investigated in the field and in the greenhouse (2 cultivars). They were subjected to two water treatments, well-irrigated and droughted. Our objective was to examine which shoot and leaf characters were related to the decrease in tuber yield. Drought reduced tuber yields by 11% in 53%. Drought stress highly reduced the dry mass of leaves in all cases. Tuber number was reduced only in early cultivars whereas in the later cultivars, leaf area index and leaf area duration were more affected than in the early cultivars. The cultivar which maintained its tuber growth rate better under drought during the first three weeks of tuber bulking also maintained its yield better. No clear common reaction of early versus later varieties to drought was found.potato / drought stress / cultivar / agro-physiological parameters Résumé -Effet du stress hydrique et du cultivar sur les paramètres de croissance, le rendement et ses composantes. Quatre variétés de pomme de terre (Solanum tuberosum L.) de précocité variable et réputées différentes au niveau de la tolérance à la sécheresse ont été testées, sous deux régimes hydriques (irrigué et stressé) au champ et sous serre. Notre objectif était d'étudier les relations entre l'évolution de différents paramètres de surface foliaire, et de masse (tiges et des tubercules) au cours du cycle et les diminutions de rendement en tubercules. Le stress hydrique a réduit le poids des tubercules de 11à 53 %. Le stress hydrique a fortement réduit la masse sèche foliaire dans tous les cas. Le nombre de tubercules a été réduit uniquement chez les cultivars précoces, tandis que les cultivars tardifs ont plus été affectés au niveau de l'indice foliaire et de sa durée. Les cultivars qui ont mieux maintenu le taux de croissance de leurs tubercules durant les trois premières semaines de remplissage ont également mieux maintenu leurs rendements. Aucune relation précocité -sensibilité au rendement sous stress n'a été observée. pomme de terre / stress hydrique / cultivar / paramètres agro-physiologiques

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The effect of early drought stress on numbers of tubers and stolons of potato in controlled and field conditions

Cited by 74 publications

References 18 publications

Potato Crop Response to Genotype and Environment in a Subtropical Highland Agro-ecology

Potato Crop Response to Genotype and Environment in a Subtropical Highland Agro-ecology

Evaluation of Potato Cultivars for Resistance Against Water Deficit Stress Under In Vivo Conditions

The effect of drought and cultivar on growth parameters, yield and yield components of potato

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