Can We Use the Relationship Between Within-Field Elevation and NDVI as an Indicator of Drought-Stress?

Maestrini, Bernardo; Brouwer, Matthijs C.; Been, T.H.; Lotz, L.A.P.

doi:10.1007/978-3-030-39815-6_12

Cited by 2 publications

(2 citation statements)

References 11 publications

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“…Under full irrigation, the highest yields were recorded for genotypes 1 and 2 on loam and genotypes 3 and 4 on sand. However, in stress conditions such genotypic differentiation between soil types was not observed and yields on sand were always lower than on loam, an effect recently also observed for Dutch potato production systems [35]. The treatments significantly differed in their effects on yield (Table 4).…”

Section: Discussionmentioning

confidence: 53%

Phenology-Adjusted Stress Severity Index to Assess Genotypic Responses to Terminal Drought in Field Grown Potato

et al. 2020

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Potato is a drought susceptible, often rain-fed crop suffering strongly from even short periods of soil water deficit. With global environmental conditions changing, potato clones resistant to variable water supply are needed and identifying them is a major task. Many indices assessing potato tolerance to water deficit have been proposed, albeit none of them takes into account the severity of the stress or the sensitivity of the developmental stage during which the stress occurs. As a result, data obtained on genotypes in one location or season are normally not useful in another location or in a different season. We have developed an index evaluating yield response of potato to water deficit based on the soil tension the genotype was subjected to for the duration of the stress modified by the development stage of the genotype. The sum of the daily values was combined in a stress severity index (SSI). In total thirteen genotypes differing in duration and sensitivity to drought were subjected to four levels of deficit irrigation on two soil types at different development stages over two years. Early drought (early tuber filling) reduced yields up to 95% whereas late drought (late tuber bulking) reduced yields significantly less. SSI depended on the genotypic phenological development and on the soil tension values and ranges between 25 and 3500. The index differentiated genotypic responses well across treatments and soil types, even with these relatively advanced development stages, up to a value of 1000. Beyond 1000, yields were generally reduced by more than 60% and a differentiation between genotypes was not possible anymore. SSI constitutes a method that renders site, location, year, season, and soil type effects comparable for responses of potato clones to soil water deficit. Combining this measure of stress severity with other proposed indices may improve upon their current weaknesses in finding or identifying the underlying traits of drought tolerance in potato.

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Section: Discussionmentioning

confidence: 53%

Phenology-Adjusted Stress Severity Index to Assess Genotypic Responses to Terminal Drought in Field Grown Potato

et al. 2020

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“…The reason for the difference is primarily related to the chlorophyll content of the plant, as the absorption of chlorophyll radiation is high in the visible range while low in the NIR range [89]. Accordingly, the NDVI can be used to detect the effect of drought [44,90], the appearance of disease [91,92], the nutrient supply problems of plants [44], or the phytotoxicity effect of herbicide [93].…”

Section: Ndvi Resultsmentioning

confidence: 99%

Effect of Drought and Seed Tuber Size on Agronomical Traits of Potato (Solanum tuberosum L.) under In Vivo Conditions

Hanász,

Zsombik,

Magyar-Tábori

et al. 2024

Agronomy

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Drought may considerably decrease the growth and yield of potatoes. Small tubers may have lower performance and be more sensitive to abiotic stresses than larger tubers. Since an increase in drought areas may be expected, the development of potato varieties with drought tolerance has become necessary. Two-year greenhouse experiments were conducted to test the drought tolerance of potato breeding lines (C103, C107, C20) with great osmotic stress tolerance. Minitubers with diameters of 25–35, 20–24, 15–19 and 10–14 mm were planted. Treatments were the optimal irrigated control (100%) and moderate and severe drought (60% and 20% of optimum water supply). To study the after-effects of drought, tubers from different treatments were planted separately the following year because seed tuber priming may increase drought tolerance. Seed tubers (25–35 mm), two irrigation treatments (control and severe drought), and two control cultivars were used in the second year. We observed the rate of emergence from day-after-planting (DAP) 20 to 30 and flowering from 48 to 54. NDVI measurements were performed on the DAP35-45-75. Plant height and fresh weight of aboveground biomass (AGB) were recorded on DAP76. Harvested tubers were counted, weighed, and size-categorized, and then the number and fresh tuber yield per plant (TN and TY) were calculated. Stress indices (SI) were calculated as percentages of the results of control plots to compare the responses of genotypes to drought stress. We found that each breeding line showed adequate drought tolerance, although only the C103 and C107 breeding lines were stable in in vivo conditions. SI values for tuber number/tuber yield were 103/57; 102/63; 83/52; 80/58 and 55/41 in C103, C107, C20, ‘Boglárka’ and ‘Desiree’ (the last two were control varieties), respectively. The size of the seed tuber significantly affected each character, and usually minitubers larger than 20 mm performed better than smaller ones. No significant after-effect of drought stress on the next generation was found. Although we found a positive correlation (r=0.83) between NDVI values and yield parameters, the correlations in our study were not consistent in all genotypes and water treatments.

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Can We Use the Relationship Between Within-Field Elevation and NDVI as an Indicator of Drought-Stress?

Cited by 2 publications

References 11 publications

Phenology-Adjusted Stress Severity Index to Assess Genotypic Responses to Terminal Drought in Field Grown Potato

Phenology-Adjusted Stress Severity Index to Assess Genotypic Responses to Terminal Drought in Field Grown Potato

Effect of Drought and Seed Tuber Size on Agronomical Traits of Potato (Solanum tuberosum L.) under In Vivo Conditions

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