Postharvest temperature has a greater impact on apical dominance of potato seed-tuber than field growing-degree days exposure

Danieli, Raz; Blank, Lior; Salam, Bolaji Babajide; Malka, Siva Kumar; Teper‐Bamnolker, Paula; Daus, Avinoam; Zig, Uri; Amichay, Michal; Shemer, Zion; Gal‐On, Amit; Eshel, Dani

doi:10.1016/j.fcr.2018.03.020

Cited by 11 publications

(10 citation statements)

References 49 publications

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“…However, although the climatic conditions, especially precipitation, varied during the phenological period of the crop and during the years of the study, the accumulations of GDD4 were similar in the study area (Figure 6). Similar values were observed with the variety Desiree in a Mediterranean climate, indicating a weak correlation between yield and exposure of the plant to GDD (Danieli et al, 2018). Finally, the stress tolerance indices confirmed which varieties are best and least adapted to water deficit.…”

Section: Effects Of Drought Conditions On Tuber Yieldsupporting

confidence: 73%

Evaluating the Drought Tolerance of Seven Potato Varieties on Volcanic Ash Soils in a Medium-Term Trial

et al. 2021

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One of the main factors limiting the productivity of potatoes (Solanum tuberosum L.) is water stress. Two irrigation systems: full irrigation (I) and rainfed conditions (R), were compared over the growing seasons from 2012–13 to 2019–20. The evaluated varieties were Desiree, Karú-INIA, Patagonia-INIA, Puyehue-INIA, Yagana-INIA, Yaike, and Porvenir. This study determined (i) the yield and tuber size distribution, (ii) their relationship between productivity and environmental conditions, and (iii) the most drought-tolerant varieties based on drought tolerance indices. Nine indices including yield index (YI), tolerance index (TOL), mean productivity (MP), geometric mean productivity (GMP), harmonic mean (Harm), stress tolerance index (STI), harmonic mean productivity (HMP), yield reduction (Yr), and stress susceptible index (SSI) were calculated by using tuber yield under I and R conditions. Tuber yield under R conditions decreased by 27 and 34%. However, the highest yield under R conditions occurred in years with more precipitation between 60 and 120 days after planting (DAP; ±60 mm). Under R conditions, the varieties Porvenir, Patagonia-INIA, Yaike, and Puyehue-INIA showed more tolerance to water stress. Water stress negatively affected tuber size distribution, reducing the production of tubers with size >65 mm by 50–60%. The best indices to study drought tolerance were TOL, MP, GMP, Harm, STI, and HMP. This study suggests that in southern Chile, an area with big yield potential, typically cultivated as rainfed, with cool temperate climate conditions and favorable soil properties for potatoes, as Andisols, available rainfall is still a constraint for yield. Therefore, using more water stress-tolerant varieties and providing supplementary irrigation between 60 and 120 DAP are critical to optimize yield and avoid the failure of the crop in years with remarkably low precipitations, which will be more pronounced in the future according to weather trends. These results exemplify how much we can lose in productivity in rainfed conditions even in one of the most favorable areas for growing potatoes in the world and how risky this situation can be for the performance of the potato farms in the future.

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Section: Effects Of Drought Conditions On Tuber Yieldsupporting

confidence: 73%

Evaluating the Drought Tolerance of Seven Potato Varieties on Volcanic Ash Soils in a Medium-Term Trial

et al. 2021

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“…This may be associated with the higher stem density per plant, which may lead to an imbalance between the source and drain and, consequently, to juvenile tubers (Dellai et al, 2008). The use of potato seeds that are still in the period of apical dominance is undesirable because planting at this stage results in a decreased stem population and low productive potential due to poor utilization of solar radiation (Bisognin et al, 2008;Danieli et al, 2018), which corrabora with the present work for the size of tubercle type III. Type I seed tubers that were more sprouted positively contributed to increasing the number of tubers, as a function of the bud stage, possibly because they presented lower dormancy compared with the type III seed tubers.…”

Section: Discussionmentioning

confidence: 50%

“…Type I seed tubers that were more sprouted positively contributed to the number of tubers. However, the large number of tubers formed in a plant largely results from small tubers among those produced in the plant (Filgueira, 1999;Danieli et al, 2018). On the other hand, the type III seed tubers resulted in a smaller number of stems and tubers per plant.…”

Section: Discussionmentioning

confidence: 99%

“…Potato dormancy is a complex process with an extensive release phase, with the period of apical domination in seed potatoes beginning after harvest (Liu et al, 2017). The apical dominance of seed potatoes is affected by physiologic age, thus interfering with the number of main stems produced by the seed tuber (Krijthe, 1962;Danieli et al, 2018). With the progression of the seed potato age, the apical dominance decreases (Eshel & Teper-Bamnolker, 2012;Urrea-Hernandez et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Influence of seed tuber size and sprouting stage on the phytotechnical characteristics of the potato var. Ágata

Cavalcante¹,

Soares²,

Andrade³

et al. 2019

Aust J Crop Sci

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The use of seed tubers of suitable bud stage is of paramount importance in potato crop production because it enables obtaining the number of stems closest to that desired. The objective of this study was to study the influence of bud stage and seed potato tubercle size on the plant characteristics of the potato var. Ágata. The experiment was carried out between January and April 2017. The treatments included two sizes of seed tubers of Agata variety types I (50-60 mm) and III (30-40 mm) and four stages of growth (A, larger sprout, shoots bigger than 1 cm; B, shoots of approximately 0.7 cm; C, shoots of approximately 0.4 cm; and D, less budding, incipient shoots of up to 0.1 cm). The number of stems and tubers per plant, the number of tubers per stem, the production and classification of tubers, and the average mass of tubers were evaluated. A positive association was found between the seed tuber size and sprouting stage and the number of stems per plant. The number of tubers and stems per plant was positively related to the mass of the seed tuber, especially when the tuber was most sprouted. The use of type I seed tubers with an earlier budding phase favors the production of the highest number of tubers per plant. Minor seed tuber yields a lower number of tubers per plant but yields a higher average mass of tubers. The use of smaller seed tubers (type III) is recommended because they could present a higher productive potential and a higher percentage of large tubers.

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“…Potato tubers have been used as a model system to study ED characteristics [8][9][10][11] . Tuber dormancy represents a case in which an otherwise annual plant generates a vegetative perennating organ with an unclear chilling requirement 3,12 . The potato tuber is a stem formed by swelling of the subapical underground stolons 13 .…”

Section: Introductionmentioning

confidence: 99%

Sugar units, not chilling units, control endodormancy duration in plants – potato tuber as a case study

Danieli

Assouline²,

et al. 2021

Preprint

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Endodormancy (ED) is a crucial stage in the life cycle of many perennial plants, regulated by genetic and environmental factors. Chilling units, growth regulators, and nutrient supply are considered inducers of ED release, but the mechanism governing ED duration is poorly understood. The potato tuber has been used as a model system to study metabolic processes associated with ED release. Cold-induced sweetening is a well-known response of the tuber to chilling. Here, we found that cold stress induces an increase in sugar units in association with plasmodesmatal closure in the dormant bud cells. Tuber sweetening was associated with shortened ED duration after cooling. Heat exposure also caused sugar unit accumulation followed by faster ED release. A logistic function was developed to predict ED duration based on sugar unit measurements. We discovered that ED release is better correlated with the accumulation of sugar units compared to chilling units. CRISPR/Cas9 knockout of the vacuolar invertase gene (StVInv) induced longer ED, but only in cultivars in which the mutation modified the level of sugar units. Our results suggest that sugar units are better predictors of vegetative bud ED duration than chilling units.

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Postharvest temperature has a greater impact on apical dominance of potato seed-tuber than field growing-degree days exposure

Cited by 11 publications

References 49 publications

Evaluating the Drought Tolerance of Seven Potato Varieties on Volcanic Ash Soils in a Medium-Term Trial

Evaluating the Drought Tolerance of Seven Potato Varieties on Volcanic Ash Soils in a Medium-Term Trial

Influence of seed tuber size and sprouting stage on the phytotechnical characteristics of the potato var. Ágata

Sugar units, not chilling units, control endodormancy duration in plants – potato tuber as a case study

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